Journal of Physics: Condensed Matter最新文献_第8页

Enhancing Ω Phase Thermal Stability in Al Alloys through Interstitial Ordering. 通过间隙有序增强Al合金Ω相热稳定性。

IF 2.3 4区物理与天体物理

Journal of Physics: Condensed Matter Pub Date : 2025-01-13 DOI: 10.1088/1361-648X/ada9ae

Xiaowei Zhou, Liwen Wang, Chunxuan Liu, Jingwen Qiu, Hongrong Liu, Ziran Liu

引用次数: 0

Thickness-dependence of the in-plane thermal conductivity and the interfacial thermal conductance of supported MoS2. 二硫化钼面内热导率和界面热导率的厚度依赖性。

IF 2.3 4区物理与天体物理

Journal of Physics: Condensed Matter Pub Date : 2025-01-13 DOI: 10.1088/1361-648X/ada9ad

Henrique Felipe Melo, Juliana Brant, Paulo Guimaraes

{"title":"Thickness-dependence of the in-plane thermal conductivity and the interfacial thermal conductance of supported MoS2.","authors":"Henrique Felipe Melo, Juliana Brant, Paulo Guimaraes","doi":"10.1088/1361-648X/ada9ad","DOIUrl":"https://doi.org/10.1088/1361-648X/ada9ad","url":null,"abstract":"Nowadays, experimental research advances in condensed matter physics are deep-rooted in the development and manipulation of nanomaterials, making it essential to explore the fundamental properties of materials that are candidates for nanotechnology. In this work, we study the dependence of the molybdenum disulfide (MoS2) Raman modes on the sample temperature and on the excitation laser power. From the correlation between these two sets of measurements, we determine the planar thermal conductivity of MoS2monolayers, bilayers, trilayers, four layers, seven layers, and eight layers. We find a nonmonotonic behavior, with the thermal conductivity decreasing from 38 Wm-1K-1 to 24 Wm-1K-1, going from monolayer to trilayers, and then increasing from 24 Wm-1K-1to 50 Wm-1K-1when the thickness increases from three to eight layers. We associate this behavior with a convolution of two different phonon scattering processes: boundary scattering and interlayer scattering. We also report a monotonic thickness dependence of the interfacial thermal conductance of n-layers of MoS2on SiO2/Si, which ranges from 0.9 MWm-2K-1for a monolayer to 3.2 MWm-2K-1for eight layers films.&#xD.","PeriodicalId":16776,"journal":{"name":"Journal of Physics: Condensed Matter","volume":" ","pages":""},"PeriodicalIF":2.3,"publicationDate":"2025-01-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142978871","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

Dynamics of a single anisotropic particle under various resetting protocols. 不同复位方案下单个各向异性粒子的动力学。

IF 2.3 4区物理与天体物理

Journal of Physics: Condensed Matter Pub Date : 2025-01-10 DOI: 10.1088/1361-648X/ada336

Subhasish Chaki, Kristian Stølevik Olsen, Hartmut Löwen

{"title":"Dynamics of a single anisotropic particle under various resetting protocols.","authors":"Subhasish Chaki, Kristian Stølevik Olsen, Hartmut Löwen","doi":"10.1088/1361-648X/ada336","DOIUrl":"10.1088/1361-648X/ada336","url":null,"abstract":"We study analytically the dynamics of an anisotropic particle subjected to different stochastic resetting schemes in two dimensions. The Brownian motion of shape-asymmetric particles in two dimensions results in anisotropic diffusion at short times, while the late-time transport is isotropic due to rotational diffusion. We show that the presence of orientational resetting promotes the anisotropy to late times. When the spatial and orientational degrees of freedom are reset, we find that a non-trivial spatial probability distribution emerges in the steady state that is determined by the initial orientation, particle asymmetry and the resetting rate. When only spatial degrees of freedom are reset while the orientational degree of freedom is allowed to evolve freely, the steady state is independent of the particle asymmetry. When only particle orientation is reset, the late-time probability density is given by a Gaussian with an effective diffusion tensor, including off-diagonal terms, determined by the resetting rate. Generally, the coupling between the translational and rotational degrees of freedom, when combined with stochastic resetting, gives rise to unique behavior at late times not present in the case of symmetric particles. Considering recent developments in experimental implementations of resetting, our results can be useful for the control of asymmetric colloids, for example in self-assembly processes.","PeriodicalId":16776,"journal":{"name":"Journal of Physics: Condensed Matter","volume":" ","pages":""},"PeriodicalIF":2.3,"publicationDate":"2025-01-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142885806","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

Band sorting based on global continuity of eigenvalues and topological properties of phononic crystals. 基于特征值全局连续性和声子晶体拓扑性质的能带分选。

IF 2.3 4区物理与天体物理

Journal of Physics: Condensed Matter Pub Date : 2025-01-09 DOI: 10.1088/1361-648X/ada410

Lihong Ao, Aymeric Ramiere

引用次数: 0

Magnetic topological Weyl fermions in half-metallic In₂CoSe₄. 半金属In2CoSe4中的磁性拓扑Weyl费米子。

IF 2.3 4区物理与天体物理

Journal of Physics: Condensed Matter Pub Date : 2025-01-09 DOI: 10.1088/1361-648X/ada50a

Xiaosong Bai, Yan Wang, Wenwen Yang, Qiunan Xu, Wenjian Liu

{"title":"Magnetic topological Weyl fermions in half-metallic In2CoSe4.","authors":"Xiaosong Bai, Yan Wang, Wenwen Yang, Qiunan Xu, Wenjian Liu","doi":"10.1088/1361-648X/ada50a","DOIUrl":"10.1088/1361-648X/ada50a","url":null,"abstract":"Magnetic Weyl semimetals (WSMs) have recently attracted much attention due to their potential in realizing strong anomalous Hall effects. Yet, how to design such systems remains unclear. Based on first-principles calculations, we show here that the ferromagnetic half-metallic compound In2CoSe4has several pairs of Weyl points and is hence a good candidate for magnetic WSM. These Weyl points would approach the Fermi level gradually as the HubbardUincreases, and finally disappear after a critical valueUc. The range of the HubbardUthat can realize the magnetic WSM state can be expanded by pressure, manifesting the practical utility of the present prediction. Moreover, by generating two surface terminations at Co or In atom after cleaving the compound at the Co-Se bonds, the nontrivial Fermi arcs connecting one pair of Weyl points with opposite chirality are discovered in surface states. Furthermore, it is possible to observe the nontrivial surface state experimentally, e.g. angle-resolved photoemission spectroscopy measurements. As such, the present findings imply strongly a new magnetic WSM which may host a large anomalous Hall conductivity.","PeriodicalId":16776,"journal":{"name":"Journal of Physics: Condensed Matter","volume":" ","pages":""},"PeriodicalIF":2.3,"publicationDate":"2025-01-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142921748","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

Magnetoelectric properties and Morin type spin transitions of Na-doped GaFeO₃. na掺杂GaFeO3的磁电性质和Morin型自旋跃迁。

IF 2.3 4区物理与天体物理

Journal of Physics: Condensed Matter Pub Date : 2025-01-09 DOI: 10.1088/1361-648X/ada413

Zamzama Rahmany, Savitha Pillai S

{"title":"Magnetoelectric properties and Morin type spin transitions of Na-doped GaFeO3.","authors":"Zamzama Rahmany, Savitha Pillai S","doi":"10.1088/1361-648X/ada413","DOIUrl":"https://doi.org/10.1088/1361-648X/ada413","url":null,"abstract":"The effects of Na doping on the structure magnetic, electric, and magnetoelectric properties of GaFeO3were studied. Rietveld refinement of the XRD data reveals the formation of a single-phase trigonal structure with no impurity on Na doping up to 50% and a significant increase in lattice strain with doping. FTIR and Raman analysis further supported the phase purity of the samples. The morphology of the samples was studied using FESEM, and the particle size increased with Na doping. Magnetic data shows room temperature ferrimagnetic properties. Temperature-dependent magnetization measurements revealed a noticeable change from GaFeO3, exhibiting a Morin-like transition at 182 K for the lowest Na content. This AFM transition temperature increased to 217 K with the highest Na doping levels. The temperature-dependent Raman spectra do not reveal any structural phase transition and show a distinct change in phonon modes near the spin reorientation temperature. The leakage current density of the samples at 100 volts increased from 10-8A cm-2to (10-4-10-5A cm-2) with Na doping. The frequency-dependent dielectric constant increased largely with doping. The magnetoelectric coupling coefficient measured at room temperature rises forx= 0.05 to (36.2 ps m-1) and slowly decreases as Na concentration increases.","PeriodicalId":16776,"journal":{"name":"Journal of Physics: Condensed Matter","volume":"37 11","pages":""},"PeriodicalIF":2.3,"publicationDate":"2025-01-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142950395","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

The properties of solids: 'If you want to understand function, study structure'. 固体的性质：“如果你想了解功能，研究结构”。

IF 2.3 4区物理与天体物理

Journal of Physics: Condensed Matter Pub Date : 2025-01-09 DOI: 10.1088/1361-648X/ada412

R O Jones

引用次数: 0

Transfer matrix in graphene-like materials: the case of silicene and transition metal dichalcogenides. 类石墨烯材料中的转移基质：硅烯和过渡金属二硫族化合物的情况。

IF 2.3 4区物理与天体物理

Journal of Physics: Condensed Matter Pub Date : 2025-01-09 DOI: 10.1088/1361-648X/ada416

M Ibarra-Reyes, R Pérez-Álvarez, I Rodríguez-Vargas

引用次数: 0

Progress of anion redox in Na-rich layered transition metal oxides (Na₂MO₃) as cathode materials for sodium-ion batteries. 钠离子电池正极材料富钠层状过渡金属氧化物（Na2MO3）阴离子氧化还原研究进展。

IF 2.3 4区物理与天体物理

Journal of Physics: Condensed Matter Pub Date : 2025-01-09 DOI: 10.1088/1361-648X/ad9f06

Junjun Yin, Shuping Huang

{"title":"Progress of anion redox in Na-rich layered transition metal oxides (Na2MO3) as cathode materials for sodium-ion batteries.","authors":"Junjun Yin, Shuping Huang","doi":"10.1088/1361-648X/ad9f06","DOIUrl":"10.1088/1361-648X/ad9f06","url":null,"abstract":"Under the background of surging global demand for batteries and scarcity of Li resources, sodium-ion batteries (SIBs) are attracting attention as a potential alternative with their unique advantages, and the layered transition metal (TM) oxides therein are considered to be one of the most promising cathode materials. In this paper, firstly, the diversity of cathode materials for SIBs is systematically introduced, as well as the layered oxide structures among them are categorized, and then it focuses on the O3-type sodium-rich Na2MO3, which is promising for large-scale commercial applications, illustrating the development and mechanism of anion redox. Excess Na transforms the TM layer into the mixed Na1/3M2/3O2layer, leading to the formation of localized configuration Na-O-Na. Thereby, isolated nonhybridized O 2p states are introduced, which participate in the charge compensation process (O2-/On-) under high-voltage conditions and provide the battery with additional capacity beyond the cation redox reaction. Therefore, the Na2MO3formed by its TM element located in different periods are classified, discussed and summarized in terms of structural change characteristics, electrochemical properties and anion-redox mechanism. However, this particular redox mechanism is also accompanied by the challenges such as voltage hysteresis, irreversible oxygen loss, TM migration, capacity decay and poor air stability. Therefore, to address these challenges, various improvement strategies have been proposed, including doping of large radius metal ions, light metal ions, TM ions with high covalency with O, nonmetal ions, formation of mixed phases, and surface modification. This work is expected to provide new ways to find and design novel high-capacity Na-rich layered oxide cathode materials.","PeriodicalId":16776,"journal":{"name":"Journal of Physics: Condensed Matter","volume":" ","pages":""},"PeriodicalIF":2.3,"publicationDate":"2025-01-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142822084","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

Magnetic-proximity-induced anomalous Hall effect at the EuO/Sb₂Te₃interface. EuO/ sb2te3界面磁邻近诱导的异常霍尔效应。

IF 2.3 4区物理与天体物理

Journal of Physics: Condensed Matter Pub Date : 2025-01-09 DOI: 10.1088/1361-648X/ada479

Indraneel Sinha, Shreyashi Sinha, Subham Naskar, Sujit Manna

{"title":"Magnetic-proximity-induced anomalous Hall effect at the EuO/Sb2Te3interface.","authors":"Indraneel Sinha, Shreyashi Sinha, Subham Naskar, Sujit Manna","doi":"10.1088/1361-648X/ada479","DOIUrl":"10.1088/1361-648X/ada479","url":null,"abstract":"Time-reversal symmetry breaking of a topological insulator phase generates zero-field edge modes which are the hallmark of the quantum anomalous Hall effect (QAHE) and of possible value for dissipation-free switching or non-reciprocal microwave devices. But present material systems exhibiting the QAHE, such as magnetically doped bismuth telluride and twisted bilayer graphene, are intrinsically unstable, limiting their scalability. A pristine magnetic oxide at the surface of a TI would leave the TI structure intact and stabilize the TI surface, but epitaxy of an oxide on the lower-melting-point chalcogenide presents a particular challenge. Here we utilize pulsed laser deposition to grow (111)-oriented EuO on vacuum cleaved and annealed Sb2Te3(0001) surfaces. Under suitable growth conditions, we obtain a pristine interface and surface, as evidenced by x-ray reflectivity and scanning tunneling microscopy, respectively. Despite bulk transport in the thick (2 mm) Sb2Te3layers, devices prepared for transport studies show a strong AHE, the necessary precursor to the QAHE. Our demonstration of EuO-Sb2Te3epitaxy presents a scalable thin film approach to realize QAHE devices with radically improved chemical stability as compared to competing approaches.","PeriodicalId":16776,"journal":{"name":"Journal of Physics: Condensed Matter","volume":" ","pages":""},"PeriodicalIF":2.3,"publicationDate":"2025-01-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142909803","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