Npg Asia Materials最新文献

{"title":"Probing the weak limit of magnetocrystalline anisotropy through a spin‒flop transition in the van der Waals antiferromagnet CrPS4","authors":"Jae Yeon Seo, Sunghyun Lim, Hyun Jun Shin, Ki Won Jeong, Jae Min Hong, Kyungsun Moon, Mi Kyung Kim, Nara Lee, Young Jai Choi","doi":"10.1038/s41427-024-00559-3","DOIUrl":"10.1038/s41427-024-00559-3","url":null,"abstract":"The influence of magnetocrystalline anisotropy (MCA) on antiferromagnetism is elucidated through the characterization of the spin‒flop transition. However, due to a lack of suitable candidates for investigation, a detailed understanding of the preservation of the spin‒flop transition in the presence of low MCA energy remains elusive. In this study, we introduce CrPS4, which is a two-dimensional van der Waals antiferromagnet, as an ideal system to explore the exceedingly weak limit of the thermally-evolved MCA energy. By employing a uniaxially anisotropic spin model and fitting it to the experimental magnetic properties, we quantify the MCA energy and identify the discernible spin configurations in different magnetic phases. Notably, even at the limit of extremely weak MCA, with a mere 0.12% of the interlayer antiferromagnetic exchange interaction at T = 33 K, which is slightly below the Néel temperature (TN) of 38 K, the spin‒flop transition remains intact. We further establish a direct correlation between the visualized spin arrangements and the progressive reversal of magnetic torque induced by rotating magnetic fields. This analysis reveals the essential role of MCA in antiferromagnetism, thus extending our understanding to previously undetected limits and providing valuable insights for the development of spin-processing functionalities based on van der Waals magnets. Though the impact of magnetic anisotropy on antiferromagnetism is manifested in spin-flop transition, understanding the preservation of this transition in weak anisotropy remains elusive. By adopting an anisotropic spin model, we find that the spin-flop transition remains intact in extremely weak anisotropy, with a mere 0.12% of interlayer exchange interaction at 33 K, slightly below the Néel temperature of 38 K. We further establish a direct relationship between the visualized spin arrangements and the progressive reversal of magnetic torque in rotating magnetic fields. Our analysis provides valuable insights for exploring novel phenomena in the realm of low-dimensional magnetism.","PeriodicalId":19382,"journal":{"name":"Npg Asia Materials","volume":"16 1","pages":"1-9"},"PeriodicalIF":8.6,"publicationDate":"2024-08-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.nature.com/articles/s41427-024-00559-3.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141923705","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Thermoregulatory integration in hand prostheses and humanoid robots through blood vessel simulation","authors":"Sang-Mi Jeong, Jonguk Yang, Youngsoo Kang, Hee Sung Seo, Keumyoung Seo, Taekyung Lim, Sanghyun Ju","doi":"10.1038/s41427-024-00558-4","DOIUrl":"10.1038/s41427-024-00558-4","url":null,"abstract":"In this paper, we introduce an innovative approach for generating robotic faces with a thermal signature similar to that of humans and equipping prosthetic or robotic hands with a lifelike temperature distribution. This approach enhances their detection via infrared cameras and promotes more natural interactions between humans and robots. This method integrates a temperature regulation system into artificial skin, drawing inspiration from the human body’s natural temperature control via blood flow. Central to this technique is a fiber network simulating blood vessels within the artificial skin. Water flows through these fibers under specific temperature and flow conditions, forming a controlled heat release system. The heat emission can be adjusted by changing the dilation of these fibers, primarily by modulating the frequency of circulation. Our findings indicate that this approach can replicate the varied thermal characteristics of different human faces and hand areas. Consequently, the robotic faces appear more human-like in infrared images, aiding their identification by infrared cameras. At the same time, the prosthetic hands achieve a more natural temperature, reducing the discomfort typically felt in direct contact with synthetic limbs. The aim of this study was to address the challenges faced by the users of prosthetic hands. The results from this study show a promising direction in humanoid robotics, fostering improved tactile interactions and redefining human–robot relationships. This innovative technique facilitates further advancements, blurring the lines between artificial aids and natural biological systems. Robotic faces and hands with human-like thermal infrared emission and physiological temperature are achieved by replicating the circulatory system’s inherent temperature regulation mechanism. The keystone of our development is an intricate system of fibers, reminiscent of blood vessels, embedded within the artificial skin. The fiber network enables controlled heat dissipation by regulating water circulation to mimic human thermal signatures.","PeriodicalId":19382,"journal":{"name":"Npg Asia Materials","volume":"16 1","pages":"1-12"},"PeriodicalIF":8.6,"publicationDate":"2024-07-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.nature.com/articles/s41427-024-00558-4.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141771071","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Emerging organic electrode materials for sustainable batteries","authors":"P. M. Hari Prasad, G. Malavika, Anuraj Pillai, Sachu Sadan, Zeena S. Pillai","doi":"10.1038/s41427-024-00557-5","DOIUrl":"10.1038/s41427-024-00557-5","url":null,"abstract":"Organic electrode materials (OEMs) possess low discharge potentials and charge‒discharge rates, making them suitable for use as affordable and eco-friendly rechargeable energy storage systems without needing metals such as lithium or sodium. OEMs can provide a sustainable energy economy by their development into stable and efficient next-generation high-power batteries. Despite the presence of several classes of OEMs, such as conducting polymers, 2D and 3D metal-organic frameworks, organolithium derivatives, 2D covalent organic frameworks, aromatic heterocyclic imides, and viologen derivatives, since their introduction in the 1960s, carbonyl-based molecules have maintained low discharge potentials and stable charging/discharging properties. Nevertheless, several redox-active organic molecules, including carbonyl derivatives, show poor electrochemical stability and ionic mobility in standard battery electrolytes, hampering their commercial use. Therefore, with the increased demand for renewable energy, the synthesis and testing of carbonyl-based OEMs continue to be performed in energy research. This review summarizes recent advances in developing carbonyl-based OEMs and their performance in rechargeable batteries. Organic electrode materials have gained considerable interest in the area of energy storage owing to their cost effectiveness, stability, tunable nature and high power. The use of natural ingredients, carbon-based materials and polymers for fabrication impart flexibility and light weight to the gadgets. Organic electrode materials present the potential for biodegradable energy storage solutions in batteries and supercapacitors, fostering innovation in sustainable technology.","PeriodicalId":19382,"journal":{"name":"Npg Asia Materials","volume":"16 1","pages":"1-19"},"PeriodicalIF":8.6,"publicationDate":"2024-07-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.nature.com/articles/s41427-024-00557-5.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141738511","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Twist angle-dependent transport properties of twisted bilayer graphene","authors":"Jin Hong Kim, Seoung-Hun Kang, Duhee Yoon, Hakseong Kim, Jin-Soo Kim, Mohd Musaib Haidari, Dong Jin Jang, Jin-Yong Ko, Young-Woo Son, Bae Ho Park, Jin Sik Choi","doi":"10.1038/s41427-024-00556-6","DOIUrl":"10.1038/s41427-024-00556-6","url":null,"abstract":"Twisted bilayer graphene (tBLG) with small twist angles has attracted significant attention because of its unique electronic properties arising from the formation of a moiré superlattice. In this study, we systematically characterized the twist-angle-dependent electronic and transport properties of tBLG grown via chemical vapor deposition. This characterization included parameters such as the charge-neutral point voltage, carrier concentration, resistance, and mobility, covering a wide range of twist angles from 0° to 30°. We experimentally demonstrated that these parameters exhibited twist-angle-dependent moiré period trends, with high twist angles exceeding 9°, revealing more practically useful features, including improved mobilities compared to those of single-layer graphene. In addition, we demonstrated that the doping states and work functions were weakly dependent on the twist angles, as confirmed by additional first-principles calculations. This study provides valuable insights into the transport properties of tBLG and its potential for practical applications in the emerging field of twistronics. We systematically characterized the twist-angle-dependent electronic and transport properties of twisted bilayer graphene (tBLG) grown via chemical vapor deposition. Parameters such as charge-neutral point voltage, carrier concentration, resistance, and mobility were examined across a wide range of twist angles from 0° to 30°. Our experimental results demonstrated that these parameters exhibited twist-angle-dependent trends corresponding to the moiré period. Notably, high twist angles exceeding 9° displayed practically useful features, including improved mobilities compared to single-layer graphene. Additionally, we found that the doping states and work functions showed weak dependence on the twist angles, a finding corroborated by first-principles calculations.","PeriodicalId":19382,"journal":{"name":"Npg Asia Materials","volume":"16 1","pages":"1-9"},"PeriodicalIF":8.6,"publicationDate":"2024-07-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.nature.com/articles/s41427-024-00556-6.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141608630","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Modulation of the electromagnetic shielding effectiveness through micro/macrostructure design for electronic packaging","authors":"Lizhi Guan, Jingbo Fan, Zhi Kai Ng, Edwin Hang Tong Teo, Hortense Le Ferrand","doi":"10.1038/s41427-024-00554-8","DOIUrl":"10.1038/s41427-024-00554-8","url":null,"abstract":"Lightweight electronic packaging that provides mechanical protection, cooling ability, and customizable electromagnetic interference (EMI) shielding effectiveness (SE) is needed for next-generation electronics. Although electronic packaging solutions with excellent EMI SE exist, there is limited research on how hierarchical design can modulate the EMI SE of an electronic packaging material on demand. In this study, the deliberate precise micro/macrostructure design of graphite-based materials using magnetically assisted 3D printing allows tuning of the EMI SE in the X band (8–12 GHz), leading to a maximum total shielding performance of 90 dB. Aligning high-density graphite microplatelets during 3D printing also remarkably amplified the total SE by 200%. Subsequently, rationally designing the oriented microstructure within a geometrical shape increases the reflection and improves the EMI SE from 40 to 60 dB in a specific direction. Our proof-of-concept samples demonstrate the potential of precise micro/macrostructure design for customizing and enhancing electronic packaging’s EMI SE while achieving good heat dissipation and mechanical protection using a versatile 3D printing method. These advances pave the way for more reliable and safer electronic systems. Magnetically assisted 3D printing allows customizable electromagnetic interference (EMI) shielding effectiveness (SE). Aligning high-density graphite microplatelets during the 3D printing parallel or perpendicularly to incident waves leads to their tailored reflection and transmission. Designing the micro/macrostructure of materials allows customization and enhancement of electronic packaging’s EMI SE while achieving good heat dissipation and mechanical protection. These advances pave the way for more reliable and safer electronic systems.","PeriodicalId":19382,"journal":{"name":"Npg Asia Materials","volume":"16 1","pages":"1-12"},"PeriodicalIF":8.6,"publicationDate":"2024-07-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.nature.com/articles/s41427-024-00554-8.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141551337","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Inorganic Cs3Bi2I9 lead-free halide perovskite film for large-area X-ray detector via low-cost ambient spray coating","authors":"Yen-Ting Chen, Zi-Xiang Wen, Chen-Fu Lin, Ming-Hsien Li, Peter Chen","doi":"10.1038/s41427-024-00552-w","DOIUrl":"10.1038/s41427-024-00552-w","url":null,"abstract":"Lead-free Cs3Bi2I9 single crystals have been demonstrated to be promising materials for direct X-ray detectors with remarkable performance. However, their application for 2D X-ray imaging is hindered by their time-consuming preparation and limited crystal size. In this paper, a thick Cs3Bi2I9 perovskite film fabricated via facile spray coating at a low processing temperature, which increases the area of the photoactive film, reduces the processing time, decreases the energy budget and the production cost, and enhances the production yield due to high material utilization, has great potential for commercial applications. Careful control of the processing temperature and intervals during spray coating results in a dense and thick perovskite film with well-stacked perovskite domains. The compact perovskite film enhances the charge transport capability of the Cs3Bi2I9 perovskite film and reduces the dark current density of the X-ray detector. The resultant X-ray detector, prepared through a two-step spray coating process, exhibited a sensitivity of 127.23 μC Gyair−1 cm−2 and a detection limit of 7.4 μGyair s−1. In addition, the device delivers long-term stability with a consistent photoresponse when exposed to consecutive X-ray pulse irradiation. A two-step spray coating process (first step: 20 cycles of spray coating at 110 °C with 40 s intervals; second step: 180 cycles of spray coating at 130 °C with 20 s intervals) was employed to a produce large-area, compact, and thick Cs3Bi2I9 perovskite film for the application of direct X-ray detectors. The fabricated device achieved a large active area of 150 mm2, a sensitivity of 127.23 μC Gyair−1 cm−2, a detection limit of 7.4 μGyairs−1, and durability after long-term X-ray pulse irradiation.","PeriodicalId":19382,"journal":{"name":"Npg Asia Materials","volume":"16 1","pages":"1-15"},"PeriodicalIF":8.6,"publicationDate":"2024-06-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.nature.com/articles/s41427-024-00552-w.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141504451","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Science and applications of 2.5D materials: development, opportunities and challenges","authors":"Hiroki Ago, Pablo Solís-Fernández","doi":"10.1038/s41427-024-00551-x","DOIUrl":"10.1038/s41427-024-00551-x","url":null,"abstract":"Research on two-dimensional (2D) materials has made tremendous progress reflecting their unique properties and promising applications. In this perspective, we review the novel concept of “2.5-dimensional (2.5D) materials”, which represent new opportunities to extend the field of materials science beyond 2D materials. This concept consists of controlling van der Waals interactions and using interlayer nanospaces to synthesize new materials and explore their intriguing properties. It also includes combination with other dimensional materials, the fabrication of three-dimensional (3D) architectures of 2D materials, and practical applications in our 3D everyday life. We discuss recent research based on this concept and provide future perspectives. Although atomically thin 2D materials have attracted great interest from their unique properties and promising applications, the integration of multiple 2D materials or their modifications are more exciting because they offer opportunities to explore new frontier of materials science. This perspective illustrates the new concept of “2.5-dimensional (2.5D) materials”, which symbolically represents the great potential offered by different routes to extend the realm of 2D materials. Some examples of 2.5D materials are reviewed, such as multicomponent heterostructures, intercalation, combination with other dimensional materials, functionalization, and application to 3D devices. In this perspective, we present the recent progress of this 2.5D materials research and future outlook.","PeriodicalId":19382,"journal":{"name":"Npg Asia Materials","volume":"16 1","pages":"1-7"},"PeriodicalIF":8.6,"publicationDate":"2024-06-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.nature.com/articles/s41427-024-00551-x.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141504450","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Ultrathin skin-conformable electrodes with high water vapor permeability and stretchability characteristics composed of single-walled carbon nanotube networks assembled on elastomeric films","authors":"Tatsuhiro Horii, Kai Yamashita, Marimo Ito, Kei Okada, Toshinori Fujie","doi":"10.1038/s41427-024-00553-9","DOIUrl":"10.1038/s41427-024-00553-9","url":null,"abstract":"Herein, we report on conductive ultrathin films (nanosheets) with the characteristics of stretchability and water vapor permeability for skin-conformable bioelectrodes. The films are fabricated by combining conductive fibrous networks of single-wall carbon nanotubes (SWCNTs) and poly(styrene-b-butadiene-b-styrene) (SBS) nanosheets (i.e., SWCNT-SBS nanosheets). An increase in the number of SWCNT coatings increases both the thicknesses and densities of the SWCNT bundles. The SBS nanosheets coated with three layers of SWCNTs (i.e., SWCNT 3rd-SBS nanosheets) show comparable sheet resistance to the SBS nanosheets coated with poly(3,4-ethylenedioxithiophene) doped with poly(4-styrenesulfonate acid) (PEDOT:PSS) containing 5 wt.% butylene glycol (i.e., PEDOT:PSS/BG5-SBS nanosheets). In addition, the SWCNT 3rd-SBS nanosheets exhibit significantly reduced elastic moduli and increased elongations at break compared to the PEDOT:PSS/BG5-SBS nanosheets. Furthermore, the calculated water vapor transmission ratio of the 210-nm-thick SBS nanosheets (268,172 g m−2 (2 h)−1) is greater than that of the filter paper (6345 g m−2 (2 h)−1). The SWCNT 3rd-SBS nanosheets attached to model skin show high tolerances to bending and artificial sweat at different pH values (i.e., the electrical resistance changes ~1.1 times). Finally, the SWCNT 3rd-SBS nanosheet is applied to detect the surface electromyogram from the forearm of a subject. This nanosheet displays a signal-to-noise ratio similar to that of the PEDOT:PSS/BG5-SBS nanosheet. We report on conductive ultrathin films (referred to as “nanosheets”) with stretchability and water vapor permeability for skin-conformable bioelectrodes. By combining conductive fibrous networks of single-wall carbon nanotubes and poly(styrene-b-butadiene-b-styrene) continuous nanosheets (i.e., SWCNT-SBS nanosheets), the conductive nanosheet shows a high tolerance to bending on a model skin sheet and a high permeability to humidity. Finally, we demonstrate that the conductive nanosheet can detect the surface electromyogram signals from a subject’s forearm.","PeriodicalId":19382,"journal":{"name":"Npg Asia Materials","volume":"16 1","pages":"1-13"},"PeriodicalIF":8.6,"publicationDate":"2024-06-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.nature.com/articles/s41427-024-00553-9.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141504452","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Monitoring ocular disease via optical nanostructures potentially applicable to corneal contact lens products","authors":"Bader AlQattan, Mohamed Elsherif, Fahad Alam, Haider Butt","doi":"10.1038/s41427-024-00550-y","DOIUrl":"10.1038/s41427-024-00550-y","url":null,"abstract":"Ocular diseases can cause vision problems or even blindness if they are not detected early. Some ocular diseases generate irregular physical changes in the eye; therefore, reliable diagnostic technology for continuous monitoring of the eye is an unmet clinical need. In this study, a pulsed laser (Nd:YAG) was used to create optical nanostructures on a hydrogel-based commercial contact lens. Simulations were used to determine the spacing of the nanostructures, which were then produced and tested on the lens in ambient humidity and fully hydrated environments. The nanostructures produced a 4° diffraction angle difference in response to the environmental changes. Vision obstruction was considered while designing the nanostructure features on the lens. The curved nanostructures exhibited a series of visible rainbow colors with an average range of 8° under normal room light. A spherical surface was also used to simulate the human eye, and application of a force (curvature change) caused the nanostructure spacing to change, influencing the visible color of the contact lenses. A smartphone camera application was used to measure the progress of ocular diseases by analyzing the RGB color values of the visible color. The nanostructures were also responsive to K+ ion variations in artificial tear fluids, with a 12 mmol L−1 sensitivity, which may allow the detection of ocular ionic strength changes. A pulsed laser created optical nanostructures (holograms) on hydrogel-based soft contact lenses. The nanostructures produced varying diffraction patterns in response to the environmental changes. Vision obstruction was considered while designing the nanostructure features on the lens surface. A change in curvature of the contact lens caused the nanostructure spacing to change, influencing the visible color of the hologram. A smartphone camera application was used to monitor the diffraction colors by analyzing the RGB color values.","PeriodicalId":19382,"journal":{"name":"Npg Asia Materials","volume":"16 1","pages":"1-13"},"PeriodicalIF":8.6,"publicationDate":"2024-06-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.nature.com/articles/s41427-024-00550-y.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141341662","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Topologically influenced terahertz emission in Co2MnGa with a large anomalous Hall effect","authors":"Ruma Mandal, Ren Momma, Kazuaki Ishibashi, Satoshi Iihama, Kazuya Suzuki, Shigemi Mizukami","doi":"10.1038/s41427-024-00545-9","DOIUrl":"10.1038/s41427-024-00545-9","url":null,"abstract":"The terahertz (THz) spectral zone is one of the most exciting but least explored domains of the electromagnetic spectrum. To extend the applicability of THz waves, the present objective is to develop an efficient, compact, durable, and low-cost THz emitter source. A spintronic THz emitter consisting of a ferromagnetic/nonmagnetic bilayer heterostructure is a promising innovation that can provide an alternative solution/replacement for conventional THz emitters. To further develop these spin-based THz emitters, we demonstrate an efficient and strong THz emission from a single layer of Co2MnGa with a large anomalous Hall effect (AHE) influenced by its Weyl semimetallic nature. Strong correlations among the THz emission, AHE, and chemical ordering of the full Heusler crystal structures for Co2MnGa are shown. Based on proper structural and chemical design, the topological nature of this material facilitates systematic optimization. Our initial findings provide a new design concept for the topological influences on spin-based THz emitters, and these emitters are expected to facilitate the further development of the intriguing Weyl physics. Our investigation delves into the pulse-laser-induced emission of THz waves from a single layer of Co2MnGa thin film, emphasizing its notable anomalous Hall effect (AHE) stemming from its Weyl semimetallic characteristics. We establish robust correlations between THz emission, AHE, and the chemical structure of Co2MnGa thin films. Significantly, Co2MnGa films exhibit much larger THz emission compared to conventional CoFeB films. These findings introduce an innovative approach to designing spin-based THz emitters and promise to deepen our understanding of Weyl physics.","PeriodicalId":19382,"journal":{"name":"Npg Asia Materials","volume":"16 1","pages":"1-11"},"PeriodicalIF":8.6,"publicationDate":"2024-06-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.nature.com/articles/s41427-024-00545-9.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141372884","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}