Physica Status Solidi B-basic Solid State Physics最新文献_第2页

Hole Spin Coherence in InAs/InAlGaAs Self‐Assembled Quantum Dots Emitting at Telecom Wavelengths 以电信波长发射的 InAs/InAlGaAs 自组装量子点中的空穴自旋相干性

IF 1.6 4区物理与天体物理

Physica Status Solidi B-basic Solid State Physics Pub Date : 2024-09-03 DOI: 10.1002/pssb.202400174

Eiko Evers, Nataliia E. Kopteva, Vitalie Nedelea, Andrei Kors, Ranbir Kaur, Johann Peter Reithmaier, Mohamed Benyoucef, Manfred Bayer, Alex Greilich

引用次数: 0

Nonresonant Terahertz Detector Based on Improved N‐Polar AlGaN/GaN Plasma Wave High‐Electron‐Mobility Transistors 基于改进型 N 极 AlGaN/GaN 等离子体波高电子迁移率晶体管的非共振太赫兹探测器

IF 1.6 4区物理与天体物理

Physica Status Solidi B-basic Solid State Physics Pub Date : 2024-08-26 DOI: 10.1002/pssb.202400055

Yang Dai, Ruosong Yuan, Yukun Li, Leiyu Gao, Yiting Zhang, Pengzhan Wang, Yunyao Zhang, Xiaoyi Lei, Han Zhang, Wu Zhao

引用次数: 0

On the Study of Thickness Gradients in Novel Star Honeycombs: Classical and Combinatorial Designs 关于新型星形蜂窝厚度梯度的研究：经典设计与组合设计

IF 1.6 4区物理与天体物理

Physica Status Solidi B-basic Solid State Physics Pub Date : 2024-08-26 DOI: 10.1002/pssb.202400295

Xuelin Li, Zhuangzhuang Li, Zhuoyu Guo, Jiahui Lin, Yue Zhou, Zonglai Mo, Jun Li

{"title":"On the Study of Thickness Gradients in Novel Star Honeycombs: Classical and Combinatorial Designs","authors":"Xuelin Li, Zhuangzhuang Li, Zhuoyu Guo, Jiahui Lin, Yue Zhou, Zonglai Mo, Jun Li","doi":"10.1002/pssb.202400295","DOIUrl":"https://doi.org/10.1002/pssb.202400295","url":null,"abstract":"Herein, a series of gradient designs are carried out to enhance further the energy absorption capacity of a novel star honeycomb. These include unidirectional and bidirectional gradient designs along the impact direction, while the gradient changes in the non‐impact direction are considered. Via the coupling of bidirectional and unidirectional directions, a combined gradient evolution method is further proposed. The in‐plane compression characteristics of these gradient honeycombs are systematically revealed based on the validated finite element method at low‐, medium‐, and high‐velocity impacts, respectively. The results show that honeycombs with gradient variations in the impact direction are realized as localized modes under both low‐ and medium‐velocity impacts, while honeycombs with gradient design only in the non‐impact direction exhibited global modes and “local + global” modes, respectively; under high‐speed impacts, honeycombs with gradient configurations in the non‐impact direction showed stepped layer‐by‐layer collapses, whereas honeycombs with gradient evolutions only in the impact direction collapsed in I‐shaped layers. Besides, the increase in compressive strength and specific energy absorption of honeycomb with combined gradient configuration can be up to 38.1% and 67.9%. This article provides a new idea of honeycomb gradient evolution, which can provide a reference for improving the energy‐absorption capacity of honeycombs.","PeriodicalId":20406,"journal":{"name":"Physica Status Solidi B-basic Solid State Physics","volume":null,"pages":null},"PeriodicalIF":1.6,"publicationDate":"2024-08-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142189096","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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

Advantages of Ultrathin AlN/GaN/AlN Quantum Wells for Excitonic Population Distribution and Transition Features Studied by Phononic–Excitonic–Radiative Model 利用声子-激子-辐射模型研究超薄 AlN/GaN/AlN 量子阱在激子种群分布和转变特征方面的优势

IF 1.6 4区物理与天体物理

Physica Status Solidi B-basic Solid State Physics Pub Date : 2024-08-26 DOI: 10.1002/pssb.202400038

Masaya Chizaki, Yoshihiro Ishitani

{"title":"Advantages of Ultrathin AlN/GaN/AlN Quantum Wells for Excitonic Population Distribution and Transition Features Studied by Phononic–Excitonic–Radiative Model","authors":"Masaya Chizaki, Yoshihiro Ishitani","doi":"10.1002/pssb.202400038","DOIUrl":"https://doi.org/10.1002/pssb.202400038","url":null,"abstract":"Excitons are expected to be a high‐efficiency emission source in UV light‐emitting devices. However, the damping of the excitonic laser oscillation has been reported under conditions where the excitonic states are expected to be populated in the conventional theory. In order to understand the exciton dynamics under the thermal nonequilibrium state, a theoretical model including various energy species in semiconductors such as electrons, phonons, and photons is required. Herein, a 2D phononic–excitonic–radiative model is constructed to analyze the exciton dynamics in a 2D system. 2D excitons with four principal quantum number states and the continuum in the lowest energy level of the AlN/GaN/AlN quantum wells are considered. It is found that the 2D phonon significantly augments the excitation transition rate. When the high recombination rate corresponding to stimulated emission is considered, the exciton binding energy of 108 meV is not enough to reduce the population in the high‐order discreet states and the continuum states, while the binding energy of 215 meV corresponding to the one monolayer GaN has an advantage of reducing these populations. The analysis of population flux has an advantage in discussing the increase in the kinetic energy transfer to the 1S exciton.","PeriodicalId":20406,"journal":{"name":"Physica Status Solidi B-basic Solid State Physics","volume":null,"pages":null},"PeriodicalIF":1.6,"publicationDate":"2024-08-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142189095","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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

Corrections of Electron–Phonon Coupling for Second‐Order Structural Phase Transitions 二阶结构相变的电子-鹭鸶耦合校正

IF 1.6 4区物理与天体物理

Physica Status Solidi B-basic Solid State Physics Pub Date : 2024-08-26 DOI: 10.1002/pssb.202400139

Mario Graml, Kurt Hingerl

{"title":"Corrections of Electron–Phonon Coupling for Second‐Order Structural Phase Transitions","authors":"Mario Graml, Kurt Hingerl","doi":"10.1002/pssb.202400139","DOIUrl":"https://doi.org/10.1002/pssb.202400139","url":null,"abstract":"Structural phase transitions are accompanied by a movement of one nucleus (or a few) in the crystallographic unit cell. If the nucleus movement is continuous, a second‐order phase transition without latent heat results, whereas an abrupt nucleus displacement indicates a first‐order phase transition with accompanying latent heat. Herein, a Hamiltonian including electron–phonon coupling (EPC) as proposed by Kristoffel and Konsel is taken. Contrary to their treatment, both the kinetic energy of the nucleus and its position are treated. The interaction of the many‐electron system with the single nucleus is taken into account by the Born–Oppenheimer approximation and perturbative expressions for the free energies are derived. The nuclei corrections due to the entangled electrons are found to be minor, but highlight the importance of the symmetry breaking at low temperature. Furthermore the free energy for a canonical ensemble is computed, whereas Kristoffel and Konsel use a grand canonical ensemble, which allows to derive more stringent bounds on the free energy. For the zero‐order nucleus correction, the shift of the phase transition temperature by evaluating the free energy is deduced.","PeriodicalId":20406,"journal":{"name":"Physica Status Solidi B-basic Solid State Physics","volume":null,"pages":null},"PeriodicalIF":1.6,"publicationDate":"2024-08-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142189094","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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

Bismuth Ordering and Optical Anisotropy in GaAsBi Alloys 砷化镓铋合金中的铋有序性和光学各向异性

IF 1.6 4区物理与天体物理

Physica Status Solidi B-basic Solid State Physics Pub Date : 2024-08-26 DOI: 10.1002/pssb.202400352

Ilaria Tomei, Tadas Paulauskas, Vaidas Pačebutas, Sandra Stanionyte, Filippo Pierucci, Beatrice Bonanni, Anna Sgarlata, Massimo Fanfoni, Claudio Goletti

{"title":"Bismuth Ordering and Optical Anisotropy in GaAsBi Alloys","authors":"Ilaria Tomei, Tadas Paulauskas, Vaidas Pačebutas, Sandra Stanionyte, Filippo Pierucci, Beatrice Bonanni, Anna Sgarlata, Massimo Fanfoni, Claudio Goletti","doi":"10.1002/pssb.202400352","DOIUrl":"https://doi.org/10.1002/pssb.202400352","url":null,"abstract":"Reflectance anisotropy spectroscopy (RAS) is applied to investigate GaAsBi samples grown by molecular beam epitaxy on (001)‐oriented GaAs substrates with GaAs or InGaAs buffer layers, resulting in nearly lattice‐matched or compressive strain conditions, with Bi concentration in the alloy in the range 2–5%. These new samples allow to bridge the gap in the Bi concentration values of previous RAS experiments (C. Goletti et al., Appl. Phys. Lett. 2022, 120, 031902), confirming the [110]‐polarized Bi‐related anisotropy in optical spectra below 3 eV and the linear dependence of its amplitude on Bi concentration. The characterization of the grown GaAsBi samples by X‐Ray diffraction and transmission electron microscopy clearly demonstrates the presence of CuPt‐like ordering in the bulk. CuPt structure is the primary origin of the optical anisotropy measured by RAS and by polarized photoluminescence, due to the anisotropic strain produced in the bulk crystal lattice. The lineshape of the RAS spectra above 3 eV, with its overall and characteristic positive convexity, confirms this conclusion.","PeriodicalId":20406,"journal":{"name":"Physica Status Solidi B-basic Solid State Physics","volume":null,"pages":null},"PeriodicalIF":1.6,"publicationDate":"2024-08-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142189091","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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

Modulation of the Electronic Structure and Optical Properties of VO2 by Doping with X (X = Be, Mg, Al, Ga) 通过掺杂 X（X = Be、Mg、Al、Ga）调节 VO2 的电子结构和光学特性

IF 1.6 4区物理与天体物理

Physica Status Solidi B-basic Solid State Physics Pub Date : 2024-08-26 DOI: 10.1002/pssb.202400253

Dengrui Zhao, Dong Wei, Gaofu Guo, Heng Yu, Yifei Wei, Yaqiang Ma, Yanan Tang, Xianqi Dai

{"title":"Modulation of the Electronic Structure and Optical Properties of VO2 by Doping with X (X = Be, Mg, Al, Ga)","authors":"Dengrui Zhao, Dong Wei, Gaofu Guo, Heng Yu, Yifei Wei, Yaqiang Ma, Yanan Tang, Xianqi Dai","doi":"10.1002/pssb.202400253","DOIUrl":"https://doi.org/10.1002/pssb.202400253","url":null,"abstract":"Monoclinic VO2, a semiconductor with a narrow bandgap, is highly suitable for infrared (IR) spectrum utilization. The electrical and optical properties of VO2 doped with X are thoroughly examined. Specifically, Mg doping decreases the formation of V–V dimers. The presence of the 3d orbitals of the V atoms and the 2s orbital of the Mg atom leads to a decrease in the bandgap. This leads to an absorption peak of 104 in the mid‐infrared (mid‐IR) range, resulting in an optical absorption that is approximately ten times greater than that of pure VO2. As a result, it becomes simpler to detect. Notably, the responsiveness of the system doped with Mg to IR light increases. VO2 significantly increases the photocurrent density, with a 1000‐fold increase in the mid‐IR region and a tenfold increase in the near‐IR region. This finding provides a theoretical basis for empirically exploring VO2 in IR technology.","PeriodicalId":20406,"journal":{"name":"Physica Status Solidi B-basic Solid State Physics","volume":null,"pages":null},"PeriodicalIF":1.6,"publicationDate":"2024-08-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142189093","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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

Dispersive Spectra of Fröhlich Phonon Modes in Wurtzite Nitride Nanoholes with Circular and Square Cross Sections 具有圆形和方形截面的伍兹氮化物纳米孔中弗洛里希声子模式的色散光谱

IF 1.6 4区物理与天体物理

Physica Status Solidi B-basic Solid State Physics Pub Date : 2024-08-17 DOI: 10.1002/pssb.202400197

Li Zhang, Guanghui Wang, Xianli Liu, Qi Wang

{"title":"Dispersive Spectra of Fröhlich Phonon Modes in Wurtzite Nitride Nanoholes with Circular and Square Cross Sections","authors":"Li Zhang, Guanghui Wang, Xianli Liu, Qi Wang","doi":"10.1002/pssb.202400197","DOIUrl":"https://doi.org/10.1002/pssb.202400197","url":null,"abstract":"Semiconductor nanoholes have garnered significant interest due to their unique nanotopological structures, which can result in distinct physicochemical characteristics. This study delves into the properties of crystal vibrations in nanohole structures. The analytic Fröhlich phonon state and dispersion relationship in wurtzite nanoholes, with circular and square cross sections (CS), are derived using the macroscopic dielectric continuum model. It is found that two types of phonon modes, surface optical (SO) and half‐space (HS) modes, coexist in wurtzite nitride nanohole structures. These phonon modes and their dispersive behaviors in nanoholes significantly differ from those in nanowires due to the different nanotopological structures. Furthermore, the Fröhlich electron–phonon interaction Hamiltonians for SO and HS phonon modes in nanoholes are obtained based on a field quantization scheme. Numerical calculations on wurtzite AlN nanoholes reveal that the shape of the CS has a remarkable influence on the dispersive spectra of SO and HS phonon modes. Additionally, it is found that the dielectric medium significantly affects the dispersive features of SO modes, while its influence on the dispersive behavior of HS modes is negligible. The profound physical mechanisms behind these observations are deeply analyzed.","PeriodicalId":20406,"journal":{"name":"Physica Status Solidi B-basic Solid State Physics","volume":null,"pages":null},"PeriodicalIF":1.6,"publicationDate":"2024-08-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142189097","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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

On Wrist and Forearm Pain Experienced by Rowers: Can Mechanical Metamaterials Make Rowing and Coastal Rowing Safer? 关于赛艇运动员的手腕和前臂疼痛：机械超材料能否让赛艇和海岸赛艇运动更安全？

IF 1.6 4区物理与天体物理

Physica Status Solidi B-basic Solid State Physics Pub Date : 2024-08-17 DOI: 10.1002/pssb.202400289

Joseph N. Grima, Dario Cerasola, James N. Grima‐Cornish, Michelle Vella Wood, Nadia Portelli, Darren Sillato, Marilyn Casha, Alfred Gatt, Tonio P. Agius, Cynthia Formosa, Daphne Attard

{"title":"On Wrist and Forearm Pain Experienced by Rowers: Can Mechanical Metamaterials Make Rowing and Coastal Rowing Safer?","authors":"Joseph N. Grima, Dario Cerasola, James N. Grima‐Cornish, Michelle Vella Wood, Nadia Portelli, Darren Sillato, Marilyn Casha, Alfred Gatt, Tonio P. Agius, Cynthia Formosa, Daphne Attard","doi":"10.1002/pssb.202400289","DOIUrl":"https://doi.org/10.1002/pssb.202400289","url":null,"abstract":"On‐water rowing is a sport where participants make extensive, powerful, and complex repetitive movements with their wrists to pull and feather (twist) the oar. Herein, the aim is to assess the frequency and perceived causes of wrist and forearm pain in rowers and, in particular, assess whether there are any possible mechanical issues that could be addressed through the use of auxetic technology. Through an online survey of 145 on‐water rowers, it is found that 33.8% of the rowers reported wrist or forearm pain arising from rowing. The majority (67.3%) consider over‐gripping to be the cause while one out of five associated it with periods of tension and anxiety, which also led them to over‐grip. This indicates that rowing handles could benefit from the use of mechanical metamaterials, auxetics in particular, owing to their anomalous manner in how they deform when subjected to mechanical deformations. Moreover, given the rise in popularity of coastal rowing, which will become an Olympic discipline alongside classic rowing as from the 2028 Los Angeles Olympic Games, the potential use of auxetics in the manufacture of protective gear for use in coastal rowing is also discussed.","PeriodicalId":20406,"journal":{"name":"Physica Status Solidi B-basic Solid State Physics","volume":null,"pages":null},"PeriodicalIF":1.6,"publicationDate":"2024-08-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142224499","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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

Niobium Modification in Ni‐Rich Cathode Materials for Li‐Ion Batteries: Insights from Ab Initio Calculations 锂离子电池富镍阴极材料中的铌改性：来自 Ab Initio 计算的启示

IF 1.6 4区物理与天体物理

Physica Status Solidi B-basic Solid State Physics Pub Date : 2024-08-14 DOI: 10.1002/pssb.202400242

Lu Lv, Yaoyao Ma, Qinghua Zhou, Wenhua Liu, Yuhang Zhang, Huiyuan Chen, Wei Hu

引用次数: 0