Frontiers of Physics最新文献_第2页

First-principles investigation of two-dimensional iron molybdenum nitride: A double transition-metal cousin of MoSi2N4(MoN) monolayer with distinctive electronic and topological properties 二维氮化钼铁的第一性原理研究：具有独特电子和拓扑特性的 MoSi2N4（MoN）单层双过渡金属表层

IF 6.5 2区物理与天体物理

Frontiers of Physics Pub Date : 2024-07-18 DOI: 10.1007/s11467-024-1431-6

Yi Ding, Yanli Wang

{"title":"First-principles investigation of two-dimensional iron molybdenum nitride: A double transition-metal cousin of MoSi2N4(MoN) monolayer with distinctive electronic and topological properties","authors":"Yi Ding, Yanli Wang","doi":"10.1007/s11467-024-1431-6","DOIUrl":"10.1007/s11467-024-1431-6","url":null,"abstract":"<div><p>As the homologous compounds of MoSi<sub>2</sub>N<sub>4</sub>, the MoSi<sub>2</sub>N<sub>4</sub>(MoN)<sub><i>n</i></sub> monolayers have been synthesized in a recent experiment. These systems consist of homogeneous metal nitride multilayers sandwiched between two SiN surfaces, which extends the septuple-atomic-layer MSi<sub>2</sub>N<sub>4</sub> system to ultra-thick MSi<sub>2</sub>N<sub>4</sub>(MN)<sub><i>n</i></sub> forms. In this paper, we perform a first-principles study on the MoSi<sub>2</sub>N<sub>4</sub>(FeN) monolayer, which is constructed by iron molybdenum nitride intercalated into the SiN layers. As a cousin of MoSi<sub>2</sub>N<sub>4</sub>(MoN), this double transition-metal system exhibits robust structural stability from the energetic, mechanical, dynamical and thermal perspectives. Different from the MoSi<sub>2</sub>N<sub>4</sub>(MoN) one, the MoSi<sub>2</sub>N<sub>4</sub>(FeN) monolayer possesses intrinsic ferromagnetism and presents a bipolar magnetic semiconducting behaviour. The ferromagnetism can be further enhanced by the surface hydrogenation, which raises the Curie temperature to 310 K around room temperature. More interestingly, the hydrogenated MoSi<sub>2</sub>N<sub>4</sub>(FeN) monolayer exhibits a quantum anomalous Hall (QAH) insulating behaviour with a sizeable nontrivial band gap of 0.23 eV. The nontrivial topological character can be well described by a two-band <i>k · p</i> model, confirming a non-zero Chern number of <i>C</i> = 1. Similar bipolar magnetic semiconducting feature and hydrogenation-induced QAH state are also present in the WSi<sub>2</sub>N<sub>4</sub>(FeN) monolayer. Our study demonstrates that the double transition-metal MSi<sub>2</sub>N<sub>4</sub>(M′N) system will be a fertile platform to achieve fascinating spintronic and topological properties.\u0000</p><div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":573,"journal":{"name":"Frontiers of Physics","volume":"19 6","pages":""},"PeriodicalIF":6.5,"publicationDate":"2024-07-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141827052","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Multi-conditioned controlled growth of CoBi nanostructures on SrTiO3 钴铋纳米结构在 SrTiO3 上的多条件受控生长

IF 6.5 2区物理与天体物理

Frontiers of Physics Pub Date : 2024-07-17 DOI: 10.1007/s11467-024-1423-6

Desheng Cai, Yumin Xia, Pengju Li, Kun Xie, Yuzhou Liu, Yitong Gu, Gan Yu, Changgan Zeng, Ping Cui, Shengyong Qin

{"title":"Multi-conditioned controlled growth of CoBi nanostructures on SrTiO3","authors":"Desheng Cai, Yumin Xia, Pengju Li, Kun Xie, Yuzhou Liu, Yitong Gu, Gan Yu, Changgan Zeng, Ping Cui, Shengyong Qin","doi":"10.1007/s11467-024-1423-6","DOIUrl":"10.1007/s11467-024-1423-6","url":null,"abstract":"<div><p>Cobalt pnictides have been theoretically proposed to be attractive candidates for high-temperature superconductors. Additionally, monolayered CoX (X = As, Sb, Bi) on SrTiO<sub>3</sub> systems present a potential new platform for realizing topological superconductors in the two-dimensional limit, due to their nontrivial band topology. To this end, we have successfully fabricated high-quality CoBi nanoislands on SrTiO<sub>3</sub> (001) substrates by molecular beam epitaxy followed by an investigation of their atomic structure and electronic properties via in situ scanning tunneling microscopy/spectroscopy. Beyond the previously predicted lattice with <i>a</i> = <i>b</i> = 3.5 Å, 2 × 1 dimer row was observed in this study. Furthermore, our results reveal that the topography of CoBi islands is strongly influenced by various growth conditions, such as substrate temperature, the flux ratio between Co and Bi, and the annealing process. This study paves the way for further explorations of the superconductivity and topological properties of cobalt pnictide systems.\u0000</p><div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":573,"journal":{"name":"Frontiers of Physics","volume":"19 6","pages":""},"PeriodicalIF":6.5,"publicationDate":"2024-07-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141828344","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Giant anomalous transverse transport properties of Co-doped two-dimensional Fe3GaTe2 掺杂 Co 的二维 Fe3GaTe2 的巨型反常横向输运特性

IF 6.5 2区物理与天体物理

Frontiers of Physics Pub Date : 2024-07-12 DOI: 10.1007/s11467-024-1424-5

Imran Khan, Jisang Hong

{"title":"Giant anomalous transverse transport properties of Co-doped two-dimensional Fe3GaTe2","authors":"Imran Khan, Jisang Hong","doi":"10.1007/s11467-024-1424-5","DOIUrl":"10.1007/s11467-024-1424-5","url":null,"abstract":"<div><p>In spintronics, transverse anomalous transport properties have emerged as a highly promising avenue surpassing the conventional longitudinal transport behaviors. Here, we explore the transverse transport properties of monolayer and bilayer Fe<sub>3−<i>x</i></sub>Co<sub><i>x</i></sub>GaTe<sub>2</sub> (<i>x</i> = 0.083, 0.167, 0.250, and 0.330) systems. All the systems exhibit ferromagnetic ground states with metallic features and also have perpendicular magnetic anisotropy. Besides, the magnetic anisotropy is substantially enhanced with increasing Co-doping concentration. However, unlike magnetic anisotropy, the Curie temperature is suppressed by increasing the Co-doping concentration. For instance, the monolayer and bilayer Fe<sub>2.917</sub>Co<sub>0.083</sub>GaTe<sub>2</sub> hold a Curie temperature of 253 K and 269 K, which decreases to 163 K and 173 K in monolayer and bilayer Fe<sub>2.67</sub>Co<sub>0.33</sub>GaTe<sub>2</sub> systems, respectively. We find a giant anomalous Nernst conductivity (ANC) of 6.03 A/(K·m) in the monolayer Fe<sub>2.917</sub>Co<sub>0.083</sub>GaTe<sub>2</sub> at −30 meV, and this is further enhanced to 11.30 A/(K·m) in the bilayer Fe<sub>2.917</sub>Co<sub>0.083</sub>GaTe<sub>2</sub> at −20 meV. Moreover, the bilayer Fe<sub>2.917</sub>Co<sub>0.083</sub>GaTe<sub>2</sub> structure has a large anomalous thermal Hall conductivity (ATHC) of −0.14 W/(K·m) at 100 K. Overall, we find that the Fe<sub>3−<i>x</i></sub>Co<sub><i>x</i></sub>GaTe<sub>2</sub> (<i>x</i> = 0.083, 0.167, 0.250, and 0.330) structures have better anomalous transverse transport performance than the pristine Fe<sub>3</sub>GaTe<sub>2</sub> system and can be used for potential spintronics and spin caloritronics applications.</p><div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":573,"journal":{"name":"Frontiers of Physics","volume":"19 6","pages":""},"PeriodicalIF":6.5,"publicationDate":"2024-07-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141612592","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Machine learning in laser-induced breakdown spectroscopy: A review 激光诱导击穿光谱学中的机器学习：综述

IF 6.5 2区物理与天体物理

Frontiers of Physics Pub Date : 2024-07-12 DOI: 10.1007/s11467-024-1427-2

Zhongqi Hao, Ke Liu, Qianlin Lian, Weiran Song, Zongyu Hou, Rui Zhang, Qianqian Wang, Chen Sun, Xiangyou Li, Zhe Wang

{"title":"Machine learning in laser-induced breakdown spectroscopy: A review","authors":"Zhongqi Hao, Ke Liu, Qianlin Lian, Weiran Song, Zongyu Hou, Rui Zhang, Qianqian Wang, Chen Sun, Xiangyou Li, Zhe Wang","doi":"10.1007/s11467-024-1427-2","DOIUrl":"10.1007/s11467-024-1427-2","url":null,"abstract":"<div><p>Laser-induced breakdown spectroscopy (LIBS) is a spectroscopic analytic technique with great application potential because of its unique advantages for online/in-situ detection. However, due to the spatially inhomogeneity and drastically temporal varying nature of its emission source, the laser-induced plasma, it is difficult to find or hard to generate an appropriate spatiotemporal window for high repeatable signal collection with lower matrix effects. The quantification results of traditional physical principle based calibration model are unsatisfactory since these models were not able to compensate for complicate matrix effects as well as signal fluctuation. Machine learning is an emerging approach, which can intelligently correlated the complex LIBS spectral data with its qualitative or/and quantitative composition by establishing multivariate regression models with greater potential to reduce the impacts of signal fluctuation and matrix effects, therefore achieving relatively better qualitative and quantitative performance. In this review, the progress of machine learning application in LIBS is summarized from two main aspects: i) Pre-processing data for machine learning model, including spectral selection, variable reconstruction, and denoising to improve qualitative/quantitative performance; ii) Machine learning methods for better quantification performance with reduction of the impact of matrix effect as well as LIBS spectra fluctuations. The review also points out the issues that researchers need to address in their future research on improving the performance of LIBS analysis using machine learning algorithms, such as restrictions on training data, the disconnect between physical principles and algorithms, the low generalization ability and massive data processing ability of the model.</p><div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":573,"journal":{"name":"Frontiers of Physics","volume":"19 6","pages":""},"PeriodicalIF":6.5,"publicationDate":"2024-07-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141612581","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Emerging single-photon detection technique for high-performance photodetector 用于高性能光电探测器的新兴单光子探测技术

IF 6.5 2区物理与天体物理

Frontiers of Physics Pub Date : 2024-07-12 DOI: 10.1007/s11467-024-1428-1

Jinxiu Liu, Zhenghan Peng, Chao Tan, Lei Yang, Ruodan Xu, Zegao Wang

{"title":"Emerging single-photon detection technique for high-performance photodetector","authors":"Jinxiu Liu, Zhenghan Peng, Chao Tan, Lei Yang, Ruodan Xu, Zegao Wang","doi":"10.1007/s11467-024-1428-1","DOIUrl":"10.1007/s11467-024-1428-1","url":null,"abstract":"<div><p>Single-photon detections (SPDs) represent a highly sensitive light detection technique capable of detecting individual photons at extremely low light intensity levels. This technology mainly relies on the mainstream SPDs, such as photomultiplier tubes (PMTs), avalanche photodiodes (SAPD), superconducting nanowire single-photon detectors (SNSPDs), superconducting transition-edge sensor (TES), and hybrid lead halide perovskite. However, the complexity and high manufacturing cost, coupled with the requirement of special conditions like a low-temperature environment, pose significant challenges to the wide adoption of SPDs. To address the challenges faced by SPDs, significant efforts have been devoted to enhancing their performance. In this review, we first summarize the principles and technical challenges of several SPDs. Conductors, superconductors, semiconductors, 3D bulk materials, 2D film materials, 1D nanowires, and 0D quantum dots have all been discussed for single-photon detectors. Methods such as special optical structure, waveguide integration, and strain engineering have been employed to elevate the performance of single-photon detectors. These techniques enhance light absorption and modulate the band structure of the material, thereby improving the single-photon sensitivity. By providing an overview of the current situation and future challenges of SPDs, this review aims to propose potential solutions for photon detection technology.</p><div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":573,"journal":{"name":"Frontiers of Physics","volume":"19 6","pages":""},"PeriodicalIF":6.5,"publicationDate":"2024-07-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141612584","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Visualization for physics analysis improvement and applications in BESIII 改进物理分析的可视化和在 BESIII 中的应用

IF 6.5 2区物理与天体物理

Frontiers of Physics Pub Date : 2024-07-04 DOI: 10.1007/s11467-024-1422-7

Zhi-Jun Li (, ), Ming-Kuan Yuan (, ), Yun-Xuan Song (, ), Yan-Gu Li (, ), Jing-Shu Li (, ), Sheng-Sen Sun (, ), Xiao-Long Wang (, ), Zheng-Yun You (, ), Ya-Jun Mao (, )

{"title":"Visualization for physics analysis improvement and applications in BESIII","authors":"Zhi-Jun Li \u0000 (, ), Ming-Kuan Yuan \u0000 (, ), Yun-Xuan Song \u0000 (, ), Yan-Gu Li \u0000 (, ), Jing-Shu Li \u0000 (, ), Sheng-Sen Sun \u0000 (, ), Xiao-Long Wang \u0000 (, ), Zheng-Yun You \u0000 (, ), Ya-Jun Mao \u0000 (, )","doi":"10.1007/s11467-024-1422-7","DOIUrl":"10.1007/s11467-024-1422-7","url":null,"abstract":"<div><p>Modern particle physics experiments usually rely on highly complex and large-scale spectrometer devices. In high energy physics experiments, visualization helps detector design, data quality monitoring, offline data processing, and has great potential for improving physics analysis. In addition to the traditional physics data analysis based on statistical methods, visualization provides unique intuitive advantages in searching for rare signal events and reducing background noises. By applying the event display tool to several physics analyses in the BESIII experiment, we demonstrate that visualization can benefit potential physics discovery and improve the signal significance. With the development of modern visualization techniques, it is expected to play a more important role in future data processing and physics analysis of particle physics experiments.\u0000</p><div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":573,"journal":{"name":"Frontiers of Physics","volume":"19 6","pages":""},"PeriodicalIF":6.5,"publicationDate":"2024-07-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141552732","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Self-aligned TiOx-based 3D vertical memristor for a high-density synaptic array 用于高密度突触阵列的基于氧化钛的自对准三维垂直忆阻器

IF 6.5 2区物理与天体物理

Frontiers of Physics Pub Date : 2024-07-03 DOI: 10.1007/s11467-024-1419-2

Subaek Lee, Juri Kim, Sungjun Kim

{"title":"Self-aligned TiOx-based 3D vertical memristor for a high-density synaptic array","authors":"Subaek Lee, Juri Kim, Sungjun Kim","doi":"10.1007/s11467-024-1419-2","DOIUrl":"10.1007/s11467-024-1419-2","url":null,"abstract":"<div><p>The emerging nonvolatile memory, three-dimensional vertical resistive random-access memory (VRRAM), inspired by the vertical NAND structure, has been proposed to replace NAND flash memory which has reached its integration limit. To improve the vertical ionic diffusion occurring in the conventional VRRAM structure, we propose a Pt/HfO<sub>2</sub>/TiO<sub>2</sub>/Ti self-aligned VRRAM with physically confined switching cells through sidewall thermal oxidation. We achieved stable bipolar switching, endurance (>10<sup>4</sup> cycles), and retention (>10<sup>4</sup> s) responses, and improved the interlayer leakage current issue through a distinctive self-aligned structure. Additionally, we elucidated the switching mechanism by analyzing current levels concerning ambient temperature. To utilize VRRAM for neuromorphic computing, the biological synaptic functions are emulated by applying pulse stimulation to the synaptic cell. The weight modulation of biological synapses is demonstrated based on potentiation, depression, spike-rate-dependent plasticity, and spike-timing-dependent plasticity. Additionally, we improve the pattern recognition rate by creating a linear conductance modulation with an incremental pulse train in pattern recognition simulations. The stable electrical characteristics and implementation of various synaptic functions demonstrate that self-aligned VRRAM is suitable for neuromorphic systems as a high-density synaptic device.</p><div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":573,"journal":{"name":"Frontiers of Physics","volume":"19 6","pages":""},"PeriodicalIF":6.5,"publicationDate":"2024-07-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141527261","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Localized surface plasmon resonance enhanced photodetector: Physical model, enhanced mechanism and applications 局部表面等离子体共振增强型光电探测器：物理模型、增强机制和应用

IF 6.5 2区物理与天体物理

Frontiers of Physics Pub Date : 2024-07-03 DOI: 10.1007/s11467-024-1413-8

Jiangtong Su, Xiaoqi Hou, Ning Dai, Yang Li

{"title":"Localized surface plasmon resonance enhanced photodetector: Physical model, enhanced mechanism and applications","authors":"Jiangtong Su, Xiaoqi Hou, Ning Dai, Yang Li","doi":"10.1007/s11467-024-1413-8","DOIUrl":"10.1007/s11467-024-1413-8","url":null,"abstract":"<div><p>Localized surface plasmon resonance (LSPR) is an intriguing phenomenon that can break diffraction limitations and exhibit excellent light-confinement abilities, making it an attractive strategy for enhancing the light absorption capabilities of photodetectors. However, the complex mechanism behind this enhancement is still plaguing researchers, especially for hot-electron injection process, which inhibits further optimization and development. A clear guideline for basic physical model, enhancement mechanism, material selection and architectural design for LSPR photodetector are still required. This review firstly describes the mainstream understanding of fundamental physical modes of LSPR and related enhancement mechanism for LSPR photodetectors. Then, the universal strategies for tuning the LSPR frequency are introduced. Besides, the state-of-the-art progress in the development of LSPR photodetectors is briefly summarized. Finally, we highlight the remaining challenges and issues needed to be resolved in the future research.</p><div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":573,"journal":{"name":"Frontiers of Physics","volume":"19 6","pages":""},"PeriodicalIF":6.5,"publicationDate":"2024-07-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141527262","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Generation and characterization of customized Laguerre–Gaussian beams with arbitrary profiles 具有任意剖面的定制拉盖尔-高斯光束的生成和特性分析

IF 6.5 2区物理与天体物理

Frontiers of Physics Pub Date : 2024-07-01 DOI: 10.1007/s11467-024-1426-3

Chengyuan Wang, Yun Chen, Jinwen Wang, Xin Yang, Hong Gao, Fuli Li

引用次数: 0

Van der Waals epitaxy of type-II band alignment CsPbI3/TMDC heterostructure for optoelectronic applications 用于光电应用的范德华外延 II 型带排列 CsPbI3/TMDC 异质结构

IF 6.5 2区物理与天体物理

Frontiers of Physics Pub Date : 2024-06-24 DOI: 10.1007/s11467-024-1404-9

Chang Lu, Shunhui Zhang, Meili Chen, Haitao Chen, Mengjian Zhu, Zhengwei Zhang, Jun He, Lin Zhang, Xiaoming Yuan

{"title":"Van der Waals epitaxy of type-II band alignment CsPbI3/TMDC heterostructure for optoelectronic applications","authors":"Chang Lu, Shunhui Zhang, Meili Chen, Haitao Chen, Mengjian Zhu, Zhengwei Zhang, Jun He, Lin Zhang, Xiaoming Yuan","doi":"10.1007/s11467-024-1404-9","DOIUrl":"10.1007/s11467-024-1404-9","url":null,"abstract":"<div><p>Van der Waals epitaxy allows heterostructure formation without considering the lattice match requirement, thus is a promising method to form 2D/2D and 2D/3D heterojunction. Considering the unique optical properties of CsPbI<sub>3</sub> and transition metal dichalcogenides (TMDCs), their heterostructure presents potential applications in both photonics and optoelectronics fields. Here, we demonstrate selective growth of cubic phase CsPbI<sub>3</sub> nanofilm with thickness as thin as 4.0 nm and zigzag/armchair oriented nanowires (NWs) on monolayer WSe<sub>2</sub>. Furthermore, we show growth of CsPbI<sub>3</sub> on both transferred WSe<sub>2</sub> on copper grid and WSe<sub>2</sub>–based optoelectrical devices, providing a platform for structure analysis and device performance modification. Transmission electron microscopy (TEM) results reveal the epitaxial nature of cubic CsPbI<sub>3</sub> phase. The revealed growth fundamental of CsPbI<sub>3</sub> is universal valid for other two-dimensional substrates, offering a great advantage to fabricate CsPbI<sub>3</sub> based van der Waals heterostructures (vdWHs). X-ray photoelectron spectroscopy (XPS) and optical characterization confirm the type-II band alignment, resulting in a fast charge transfer process and the occurrence of a broad emission peak at lower energy. The formation of WSe<sub>2</sub>/CsPbI<sub>3</sub> heterostructure largely enhances the photocurrent from 2.38 nA to 38.59 nA. These findings are vital for bottom-up epitaxy of inorganic semiconductor on atomic thin 2D substrates for optoelectronic applications.</p><div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":573,"journal":{"name":"Frontiers of Physics","volume":"19 5","pages":""},"PeriodicalIF":6.5,"publicationDate":"2024-06-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141501331","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0