APL Materials最新文献_第8页

Enhanced interlayer electron transfer by surface treatments in mixed-dimensional van der Waals semiconductor heterostructures 在混合维范德华半导体异质结构中通过表面处理增强层间电子转移

IF 6.1 2区材料科学

APL Materials Pub Date : 2024-06-26 DOI: 10.1063/5.0214718

Takeshi Odagawa, Sota Yamamoto, Chaoliang Zhang, Kazuki Koyama, Jun Ishihara, Giacomo Mariani, Yoji Kunihashi, Haruki Sanada, Junsaku Nitta, Makoto Kohda

{"title":"Enhanced interlayer electron transfer by surface treatments in mixed-dimensional van der Waals semiconductor heterostructures","authors":"Takeshi Odagawa, Sota Yamamoto, Chaoliang Zhang, Kazuki Koyama, Jun Ishihara, Giacomo Mariani, Yoji Kunihashi, Haruki Sanada, Junsaku Nitta, Makoto Kohda","doi":"10.1063/5.0214718","DOIUrl":"https://doi.org/10.1063/5.0214718","url":null,"abstract":"We investigate the excitonic species in WS2 monolayers transferred onto III–V semiconductor substrates with different surface treatments. When the III–V substrates were covered with amorphous native oxides, negatively charged excitons dominated the spectral weight in low-temperature near-resonance photoluminescence (PL) measurements. However, when the native oxides of the III–V substrates were reduced, neutral excitons began to dominate the spectral weight, indicating a reduction in the electron density in the WS2 monolayers. The removal of the native oxides enhanced the electron transfer from the WS2 monolayer to the III–V substrate. In addition, an additional shoulder-like PL feature appeared ∼50 meV below the emission of neutral excitons, which can be attributed to the emission of localized excitons. When the III–V substrate surface was passivated by sulfur after the reduction of the native oxides, neutral excitons still dominated the spectral weight. However, the low-energy PL shoulder disappeared again, suggesting the effective delocalization of excitons through substrate surface passivation. Surface engineering of the semiconductor substrates for two-dimensional (2D) materials can provide a novel approach to control the carrier density of the 2D materials, implement deterministic carrier localization or delocalization for the 2D materials, and facilitate the interlayer transfer of charge, spin, and valley currents. These findings open the avenue for novel device concepts and phenomena in mixed-dimensional semiconductor heterostructures.","PeriodicalId":7985,"journal":{"name":"APL Materials","volume":"40 1","pages":""},"PeriodicalIF":6.1,"publicationDate":"2024-06-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141509003","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

High-temperature insulating ferromagnetic state in charge-disproportionated and spin-state-disproportionated strained SrCoO2.5 thin film 电荷不成比例和自旋态不成比例应变 SrCoO2.5 薄膜中的高温绝缘铁磁态

IF 6.1 2区材料科学

APL Materials Pub Date : 2024-05-30 DOI: 10.1063/5.0188767

Sourav Chowdhury, Anupam Jana, Ritu Rawat, Priyanka Yadav, Rajibul Islam, Fei Xue, A. K. Mandal, Sumit Sarkar, Rajan Mishra, R. Venkatesh, D. M. Phase, R. J. Choudhary

{"title":"High-temperature insulating ferromagnetic state in charge-disproportionated and spin-state-disproportionated strained SrCoO2.5 thin film","authors":"Sourav Chowdhury, Anupam Jana, Ritu Rawat, Priyanka Yadav, Rajibul Islam, Fei Xue, A. K. Mandal, Sumit Sarkar, Rajan Mishra, R. Venkatesh, D. M. Phase, R. J. Choudhary","doi":"10.1063/5.0188767","DOIUrl":"https://doi.org/10.1063/5.0188767","url":null,"abstract":"Ferromagnetic insulators (FMIs) have widespread applications in microwave devices, magnetic tunneling junctions, and dissipationless electronic and quantum-spintronic devices. However, the sparsity of the available high-temperature FMIs has led to the quest for a robust and controllable insulating ferromagnetic state. Here, we present compelling evidence of modulation of the magnetic ground state in a SrCoO2.5 (SCO) thin film via strain engineering. The SCO system is an antiferromagnetic insulator with a Neel temperature, TN, of ∼550 K. Applying in-plane compressive strain, the SCO thin film reveals an insulating ferromagnetic state with an extraordinarily high Curie temperature, TC, of ∼750 K. The emerged ferromagnetic state is associated with charge-disproportionation (CD) and spin-state-disproportionation (SSD), involving high-spin Co2+ and low-spin Co4+ ions. The density functional theory calculation also produces an insulating ferromagnetic state in the strained SCO system, consistent with the CD and SSD, which is associated with the structural ordering in the system. Transpiring the insulating ferromagnetic state through modulating the electronic correlation parameters via strain engineering in the SCO thin film will have a significant impact in large areas of modern electronic and spintronic applications.","PeriodicalId":7985,"journal":{"name":"APL Materials","volume":"1009 1","pages":""},"PeriodicalIF":6.1,"publicationDate":"2024-05-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141191523","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Reciprocal space x-ray computed tomography 对等空间 X 射线计算机断层扫描

IF 6.1 2区材料科学

APL Materials Pub Date : 2024-05-30 DOI: 10.1063/5.0203995

Arturas Vailionis, Liyan Wu, Jonathan E. Spanier

引用次数: 0

Impact of sulfur addition on the structure and dynamics of Ni–Nb alloy melts 加硫对 Ni-Nb 合金熔体结构和动力学的影响

IF 6.1 2区材料科学

APL Materials Pub Date : 2024-05-29 DOI: 10.1063/5.0205058

Nicolai Grund, Dirk Holland-Moritz, Saba Khademorezaian, Lucas P. Kreuzer, Nico Neuber, Lucas M. Ruschel, Hendrik Voigt, Johanna Wilden, Fan Yang, Soham Banerjee, Malte Blankenburg, Ann-Christin Dippel, Jan Peter Embs, Sergiy Divinski, Ralf Busch, Andreas Meyer, Gerhard Wilde

引用次数: 0

Development of one-step roll-to-roll system with incorporated vacuum sputtering for large-scale production of plasmonic sensing chips 开发用于大规模生产等离子传感芯片的一步式卷对卷系统，其中包含真空溅射技术

IF 6.1 2区材料科学

APL Materials Pub Date : 2024-05-29 DOI: 10.1063/5.0211084

Tae Eon Kim, Sunghoon Jung, Soo Hyun Lee, ChaeWon Mun, Eun-Yeon Byeon, Jun-Yeong Yang, Jucheol Park, Seunghun Lee, Heemin Kang, Sung-Gyu Park

{"title":"Development of one-step roll-to-roll system with incorporated vacuum sputtering for large-scale production of plasmonic sensing chips","authors":"Tae Eon Kim, Sunghoon Jung, Soo Hyun Lee, ChaeWon Mun, Eun-Yeon Byeon, Jun-Yeong Yang, Jucheol Park, Seunghun Lee, Heemin Kang, Sung-Gyu Park","doi":"10.1063/5.0211084","DOIUrl":"https://doi.org/10.1063/5.0211084","url":null,"abstract":"The trade-off relationship between cost and performance is a major challenge in the development of surface-enhanced Raman spectroscopy (SERS) sensors for practical applications. We propose a roll-to-roll system with incorporated vacuum sputtering to manufacture Ag-coated nanodimples (Ag/NDs) on A4-scale films in a single step. The Ag/ND SERS platforms were prepared via O2 ion beam sputtering and Ag sputtering deposition. The concave three-dimensional spaces in the Ag/NDs functioned as hotspots, and their optimal fabrication conditions were investigated with two variables: moving speed and Ag thickness. The entire process was automated, which resulted in highly consistent optical responses (i.e., relative standard deviation of ∼10%). The activation of plasmonic hotspots was demonstrated by electric-field profiles calculated via the finite-difference time-domain method. The wavelength dependency of the Ag/ND platforms was also examined by dark-field microscopy. The results indicate that the developed engineering technique for the large-scale production of Ag/ND plasmonic chips would likely be competitive in the commercial market.","PeriodicalId":7985,"journal":{"name":"APL Materials","volume":"21 1","pages":""},"PeriodicalIF":6.1,"publicationDate":"2024-05-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141198245","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Speed limits of the laser-induced phase transition in FeRh 激光诱导 FeRh 相变的速度极限

IF 6.1 2区材料科学

APL Materials Pub Date : 2024-05-28 DOI: 10.1063/5.0206095

M. Mattern, J. Jarecki, J. A. Arregi, V. Uhlíř, M. Rössle, M. Bargheer

引用次数: 0

Effective polysulfide control in lithium–sulfur batteries utilizing BiFeO3 nanoparticles 利用 BiFeO3 纳米粒子有效控制锂硫电池中的多硫化物

IF 6.1 2区材料科学

APL Materials Pub Date : 2024-05-28 DOI: 10.1063/5.0209845

Mohan K. Bhattarai, Balram Tripathi, Shweta Shweta, Satyam Kumar, Claudia C. Zuluaga-Gómez, Rajesh K. Katiyar, Brad R. Weiner, Ram S. Katiyar, Gerardo Morell

{"title":"Effective polysulfide control in lithium–sulfur batteries utilizing BiFeO3 nanoparticles","authors":"Mohan K. Bhattarai, Balram Tripathi, Shweta Shweta, Satyam Kumar, Claudia C. Zuluaga-Gómez, Rajesh K. Katiyar, Brad R. Weiner, Ram S. Katiyar, Gerardo Morell","doi":"10.1063/5.0209845","DOIUrl":"https://doi.org/10.1063/5.0209845","url":null,"abstract":"Lithium–sulfur batteries (LiSBs) offer high energy density, cost-effectiveness, and eco-friendliness, making them promising for future energy storage. This study explores using BiFeO3 (BFO) nanoparticles (NPs) to tackle challenges such as lithium polysulfides (LiPs) and shuttle issues in LiSBs. It employs a solid-state melt diffusion technique, encapsulates sulfur in single-walled carbon nanotubes (SCNTs), and utilizes BFO for effective polysulfide control. Herein, composite cathodes of sulfur (S)/SCNTs (abbr. SCNT) were fabricated, and cells were designed using a BFO-coated separator (SCNT-BFS). In addition, a cathode modification was performed with composite S/SCNTs/BFO (SCNT-BF), and a comparative analysis was conducted to assess the effectiveness of the BFO in the separator and the cathode. Cyclic voltammetry measurements revealed that the increased current peak intensity at lower reduction potential in SCNT-BF and SCNT-BFS indicated control of higher-order LiPs (Li2Sx, where 4 ≤ x ≤ 8), resulting in the generation of more stable lower-order products (Li2S2/Li2S). The charge/discharge analysis revealed controlled LiPs, resulting in high-capacity retention in SCNT-BF (∼75%) and SCNT-BFS (∼88%) over 200 cycles, which yielded capacities of 526 and 700 mAh/g at C/8 (1C = 1675 mA/g). These promising results suggest that incorporating BFO into the cathode and separator can advance the commercialization of durable LiSBs.","PeriodicalId":7985,"journal":{"name":"APL Materials","volume":"83 1","pages":""},"PeriodicalIF":6.1,"publicationDate":"2024-05-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141166878","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Patterning and epitaxy of large-area arrays of nanoscale complex oxide epitaxial heterostructures 纳米级复杂氧化物外延异质结构大面积阵列的制图和外延

IF 6.1 2区材料科学

APL Materials Pub Date : 2024-05-28 DOI: 10.1063/5.0203258

Miguel A. Betancourt-Ponce, Rui Liu, Jian Sun, Paul G. Evans, Padma Gopalan

{"title":"Patterning and epitaxy of large-area arrays of nanoscale complex oxide epitaxial heterostructures","authors":"Miguel A. Betancourt-Ponce, Rui Liu, Jian Sun, Paul G. Evans, Padma Gopalan","doi":"10.1063/5.0203258","DOIUrl":"https://doi.org/10.1063/5.0203258","url":null,"abstract":"A combination of block copolymer (BCP) lithography and solid-phase epitaxy can be employed to form large areas, on the order of square centimeters, of a high density of epitaxial crystalline complex oxide nanostructures. We have used BCP lithography with a poly(styrene-block-methyl methacrylate) (PS-b-PMMA) copolymer to template a nanohole array either directly on an (001)-oriented SrTiO3 (STO) single crystal substrate or on a 20 nm-thick Si3N4 layer deposited on the STO substrate. BCPs with the selected compositions assembled in a cylindrical phase with 16 nm diameter PMMA cylinders and a cylinder-to-cylinder spacing of 32 nm. The substrate was modified with an energetically non-preferential polymer layer to allow for the vertical alignment of the cylinders. The PMMA cylinders were removed using a subtractive process, leaving an array of cylindrical holes. For BCPs assembled on Si3N4/STO, the pattern was transferred to the Si3N4 layer using reactive ion etching, exposing the underlying STO substrate in the nanoholes. An amorphous LaAlO3 (LAO) layer was deposited on the patterned Si3N4/STO at room temperature. The amorphous LAO epitaxially crystallized within the nanoscale-patterned holes with fully relaxed lattice parameters through solid phase epitaxy, resulting in the formation of nanoscale LAO/STO epitaxial heterostructures.","PeriodicalId":7985,"journal":{"name":"APL Materials","volume":"10 1","pages":""},"PeriodicalIF":6.1,"publicationDate":"2024-05-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141171057","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Double pulse all-optical coherent control of ultrafast spin-reorientation in an antiferromagnetic rare-earth orthoferrite 反铁磁稀土正铁氧体超快自旋定向的双脉冲全光相干控制

IF 6.1 2区材料科学

APL Materials Pub Date : 2024-05-17 DOI: 10.1063/5.0197976

N. E. Khokhlov, A. E. Dolgikh, B. A. Ivanov, A. V. Kimel

引用次数: 0

Mechanical intelligence via fully reconfigurable elastic neuromorphic metasurfaces 通过完全可重构的弹性神经形态元表面实现机械智能

IF 6.1 2区材料科学

APL Materials Pub Date : 2024-05-15 DOI: 10.1063/5.0201761

M. Moghaddaszadeh, M. Mousa, A. Aref, M. Nouh

引用次数: 0