Applied Physics Letters最新文献_第2页

Double-layer LiNbO3 longitudinally excited shear wave resonators with ultra-large electromechanical coupling coefficient and spurious-free performance 具有超大机电耦合系数和无杂散性能的双层LiNbO3纵向激发剪切波谐振器

IF 4 2区物理与天体物理

Applied Physics Letters Pub Date : 2025-05-15 DOI: 10.1063/5.0250773

Zhen-Hui Qin, Hao Yan, Chen-Bei Hao, Shu-Mao Wu, Hua-Yang Chen, Sheng-Nan Liang, Si-Yuan Yu, Yan-Feng Chen

引用次数: 0

Dynamic modulation of dual-band nonreciprocal radiation in a graphene–Weyl semimetal plasmonic structure 石墨烯- weyl半金属等离子体结构中双波段非互易辐射的动态调制

IF 4 2区物理与天体物理

Applied Physics Letters Pub Date : 2025-05-15 DOI: 10.1063/5.0270822

Ye Ming Qing, Jiao Liu, Zhaoyan Yang, Yue Gou, Liang Wei Wu, Jun Wu

引用次数: 0

Dilute MnBi2Te4-alloying enables high-performance GeTe thermoelectrics 稀mnbi2te4合金化可实现高性能GeTe热电器件

IF 4 2区物理与天体物理

Applied Physics Letters Pub Date : 2025-05-15 DOI: 10.1063/5.0267606

Dan Zhang, Hongli Wang, Jiandong Liu, Manzhe Zhao, Guannan Liu, Junyou Yang, Yubo Luo, Shufang Wang

{"title":"Dilute MnBi2Te4-alloying enables high-performance GeTe thermoelectrics","authors":"Dan Zhang, Hongli Wang, Jiandong Liu, Manzhe Zhao, Guannan Liu, Junyou Yang, Yubo Luo, Shufang Wang","doi":"10.1063/5.0267606","DOIUrl":"https://doi.org/10.1063/5.0267606","url":null,"abstract":"As an attractive lead-free thermoelectric material, GeTe has gained widespread interest. However, the extremely high hole concentration seriously limits the thermoelectric performance of pristine GeTe. In this work, dilute MnBi2Te4-alloying is utilized to synergically optimize electrical- and thermal-transport properties of GeTe for thermoelectric performance improvement. It can not only decrease the precipitation of Ge to optimize carrier concentration, but also promote multi-band convergence to enlarge the density of state effective mass. Furthermore, the MnBi2Te4-alloyed samples also maintain a moderate carrier mobility. In addition, the increased point-defect scattering for phonons leads to the significant reduction in lattice thermal conductivity. Consequently, a high peak thermoelectric figure of merit (ZT) of ∼1.8 at 723 K and a large average ZT of ∼1.0 from 300 to 723 K are achieved in 4% MnBi2Te4-alloyed GeTe, showing the potential of dilute compound alloying to enhance the thermoelectric performance of GeTe by the concurrent regulation of electrical- and thermal-transport properties.","PeriodicalId":8094,"journal":{"name":"Applied Physics Letters","volume":"120 1","pages":""},"PeriodicalIF":4.0,"publicationDate":"2025-05-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144066400","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

Complex-valued Tellegen response 复值Tellegen响应

IF 4 2区物理与天体物理

Applied Physics Letters Pub Date : 2025-05-15 DOI: 10.1063/5.0267381

Fedor Nutskii, Eduardo Barredo-Alamilla, Maxim A. Gorlach

引用次数: 0

Low threshold InAs-based interband cascade lasers with room temperature lasing wavelengths near 4 and 4.4 μ m 室温激光波长接近4和4.4 μ m的低阈值inas基带间级联激光器

IF 4 2区物理与天体物理

Applied Physics Letters Pub Date : 2025-05-15 DOI: 10.1063/5.0260619

Jinglong Xie, Yuzhe Lin, Shihao Zhu, Yuan Ma, Xinkai Liu, Wanhua Zheng, Rui Q. Yang, Hong Lu

{"title":"Low threshold InAs-based interband cascade lasers with room temperature lasing wavelengths near 4 and 4.4 μ m","authors":"Jinglong Xie, Yuzhe Lin, Shihao Zhu, Yuan Ma, Xinkai Liu, Wanhua Zheng, Rui Q. Yang, Hong Lu","doi":"10.1063/5.0260619","DOIUrl":"https://doi.org/10.1063/5.0260619","url":null,"abstract":"Mid-infrared laser spectroscopy at wavelengths of 4–5 μm is important for the detection of greenhouse gases, including CO2 at 4.23 μm, N2O at 4.45 μm, and CO at 4.60 μm, with ultra-high sensitivity and selectivity. It can be used in environmental monitoring, real-time industrial process controls, medical diagnosis/therapeutics, and other applications. In this work, we report significant advances in interband cascade lasers (ICLs) with the shortest emission wavelengths among InAs-based ICLs at room temperature (RT). Benefiting from the precise control of the growth parameters in molecular beam epitaxy, ICL structures were epitaxially grown on InAs substrates with high-quality that is validated by a low threshold current density of 1.9 A/cm2 at 80 K. By minimizing the Urbach tail absorption loss in InAs with excellent material quality, broad-area (BA) devices emitting at 4.02 μm in pulsed operation are demonstrated at 300 K with a threshold current density of 232 A/cm2, which is the lowest among the InAs-based ICLs. These BA devices were able to operate with a maximum voltage efficiency of 89% at temperatures up to 258 K in the continuous wave (cw) mode and to 378 K in the pulsed mode, indicating improved thermal dissipation and a sufficient temperature range for narrow ridge devices to achieve cw operation at RT and above. These demonstrated device features suggest high potential of low-cost InAs-based ICLs for real-world applications in a wide mid-infrared wavelength region.","PeriodicalId":8094,"journal":{"name":"Applied Physics Letters","volume":"4 1","pages":""},"PeriodicalIF":4.0,"publicationDate":"2025-05-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144066403","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

Optimizing spin polarization in quantum dot vertical-gain structures through pump wavelength selection 通过泵浦波长选择优化量子点垂直增益结构中的自旋极化

IF 4 2区物理与天体物理

Applied Physics Letters Pub Date : 2025-05-15 DOI: 10.1063/5.0261768

Najm Alhosiny, Sami S. Alharthi, James Doogan, Edmund Clarke, Thorsten Ackemann

引用次数: 0

Study of Au doping processing for high quality extrinsic doped n on p HgCdTe detector 高质量HgCdTe探测器外源掺杂n的Au掺杂工艺研究

IF 4 2区物理与天体物理

Applied Physics Letters Pub Date : 2025-05-15 DOI: 10.1063/5.0268537

Dapeng Jin, Zhikai Gan, Songmin Zhou, Xi Wang, Quanzhi Sun, Xun Li, Liqi Zhu, Chun Lin

引用次数: 0

Optical and electrical readout of diamond NV centers in dependence of the excitation wavelength 金刚石NV中心的光学和电学读数与激发波长有关

IF 4 2区物理与天体物理

Applied Physics Letters Pub Date : 2025-05-15 DOI: 10.1063/5.0264362

Lina M. Todenhagen, Martin S. Brandt

引用次数: 0

Analyzing the capacity fading mechanism in high-capacity Cr8O21 as a cathode material for Li-ion batteries 分析了大容量Cr8O21作为锂离子电池正极材料的容量衰减机理

IF 4 2区物理与天体物理

Applied Physics Letters Pub Date : 2025-05-15 DOI: 10.1063/5.0255382

Baozhen Sun, Yi Yan, Bo Xu, Haimei Luo, Musheng Wu, Shuying Zhong, Chuying Ouyang

{"title":"Analyzing the capacity fading mechanism in high-capacity Cr8O21 as a cathode material for Li-ion batteries","authors":"Baozhen Sun, Yi Yan, Bo Xu, Haimei Luo, Musheng Wu, Shuying Zhong, Chuying Ouyang","doi":"10.1063/5.0255382","DOIUrl":"https://doi.org/10.1063/5.0255382","url":null,"abstract":"The capacity fading mechanism of Cr8O21 remains unclear owing to the lack of reliable evidence. To elucidate the source of capacity loss, we investigated the structures, the structural evolution process, and phase transitions of lithiated Cr8O21 (LixCr8O21) using first-principles calculations. On the one hand, we found that LixCr8O21 adopts a sandwich structure at low Li content but exhibits a rock salt-like structure at high Li content. Compared to the sandwich-like LixCr8O21, the rock salt-like LixCr8O21 possesses a reduced volume and, therefore, decreased interstitial Li sites. The rock salt-like LixCr8O21 structure can maximally store 14 Li, less than 4 Li compared to the sandwich structure. Therefore, this structural change from sandwich-like into rock salt-like is a reason for the capacity loss in Cr8O21 in the discharge process. On the other hand, the convex hull and phase diagram demonstrate that the rock salt-like LixCr8O21 is thermodynamically unstable, and a portion of it transforms into active LiCrO2 during the first discharge. However, LiCrO2 is then converted into CrO2, rather than Cr8O21 in the subsequent charge process. This irreversible phase transition (Cr8O21 → LiCrO2 in the discharge process and LiCrO2 → CrO2 in the charge process) is another significant cause for the capacity loss in Cr8O21. This study provides key theoretical evidence for the drastic capacity fading in Cr8O21 and thereby facilitates the future development of high-capacity cathodes for lithium-ion batteries.","PeriodicalId":8094,"journal":{"name":"Applied Physics Letters","volume":"17 1","pages":""},"PeriodicalIF":4.0,"publicationDate":"2025-05-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144066410","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

Acoustic selective skin effect in a coupled ring lattice 耦合环形晶格中的声选择趋肤效应

IF 4 2区物理与天体物理

Applied Physics Letters Pub Date : 2025-05-15 DOI: 10.1063/5.0254735

Yun-Kai Liu, Feng Gao, Peng Wu, Yu-Gui Peng, Bo Song, Xue-Feng Zhu

引用次数: 0