Journal of Physics: Condensed Matter最新文献_第10页

Active learning-based automated construction of Hamiltonian for structural phase transitions: a case study on BaTiO₃. 基于主动学习的结构相变哈密顿自动构建：关于 BaTiO3 的案例研究。

IF 4.6 4区物理与天体物理

Journal of Physics: Condensed Matter Pub Date : 2024-11-15 DOI: 10.1088/1361-648X/ad882a

Mian Dai, Yixuan Zhang, Nuno Fortunato, Peng Chen, Hongbin Zhang

引用次数: 0

Possible structures of skyrmion states in chiral ferromagnetic films with spatially modulated uniaxial anisotropy. 具有空间调制单轴各向异性的手性铁磁薄膜中的天电离状态的可能结构。

IF 4.6 4区物理与天体物理

Journal of Physics: Condensed Matter Pub Date : 2024-11-15 DOI: 10.1088/1361-648X/ad8ea1

R M Vakhitov, A A Akhmetova, M A Filippov

引用次数: 0

Synthesis and characterization of p-CuO/n-ZnO heterostructured composite thin films for the detection of formaldehyde gas. 用于检测甲醛气体的 p-CuO/n-ZnO 异质结构复合薄膜的合成与表征。

IF 2.3 4区物理与天体物理

Journal of Physics: Condensed Matter Pub Date : 2024-11-15 DOI: 10.1088/1361-648X/ad8f23

Sarika Yadav, P Nagaraju, Sameena Begum, M Swathi, Kurugundla Gopi Krishna, J K Ojha, G R Turpu

{"title":"Synthesis and characterization of p-CuO/n-ZnO heterostructured composite thin films for the detection of formaldehyde gas.","authors":"Sarika Yadav, P Nagaraju, Sameena Begum, M Swathi, Kurugundla Gopi Krishna, J K Ojha, G R Turpu","doi":"10.1088/1361-648X/ad8f23","DOIUrl":"10.1088/1361-648X/ad8f23","url":null,"abstract":"We report the synthesis and characterization of pure CuO and CuO-ZnO nanostructured composite thin films sprayed on particle-free glass substrates using chemical spray pyrolysis method. The films were systematically analyzed through microstructural, morphological, chemical, and gas-sensing studies. X-ray diffraction (XRD) studies confirmed the polycrystalline nature of the films, with a predominant monoclinic phase along the (002) direction. Key structural parameters, such as crystallite size, dislocation density, strain, and the number of crystallites per unit area, were reported from XRD analysis. Field emission scanning electron microscopy revealed a bundled-like morphology witha uniform particle distribution, enhancing the surface area for effective gas interaction. X-ray photoelectron spectroscopy results indicated that Cu and Zn ions existed predominantly in the 2+ oxidation state, contributing to the films' reactivity. Significantly, the gas sensing studies were investigated with static liquid distribution method, highlighting the remarkable performance of the 30 wt.% CuO-ZnO composite thin film. This composite exhibited a substantial response to 5 ppm formaldehyde at ambient conditions, showing a recovery time of 22 s and a response time of 15 s. These findings underscore the potential of CuO-ZnO composites for efficient formaldehyde gas sensing applications, marking a notable advancement in the field of environmental monitoring.","PeriodicalId":16776,"journal":{"name":"Journal of Physics: Condensed Matter","volume":" ","pages":""},"PeriodicalIF":2.3,"publicationDate":"2024-11-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142581391","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

Charge-driven first-order magnetic transition in NiPS₃. NiPS3 中电荷驱动的一阶磁性转变。

IF 4.6 4区物理与天体物理

Journal of Physics: Condensed Matter Pub Date : 2024-11-15 DOI: 10.1088/1361-648X/ad8ea0

Junik Hwang, Seonghoon Park, Beom Hyun Kim, Junghyun Kim, Je-Geun Park, Seung-Ho Baek

引用次数: 0

Composite quadrupole order in ferroic and multiferroic materials. 铁性和多铁性材料中的复合四极秩序。

IF 2.3 4区物理与天体物理

Journal of Physics: Condensed Matter Pub Date : 2024-11-12 DOI: 10.1088/1361-648X/ad8ea3

R Matthias Geilhufe

引用次数: 0

Charge transfer induced phase transition in Li₂MnO₃at high pressure. 高压下 Li2MnO3 中电荷转移诱导的相变。

IF 2.3 4区物理与天体物理

Journal of Physics: Condensed Matter Pub Date : 2024-11-12 DOI: 10.1088/1361-648X/ad8b8f

Ajinkya P Khangal, Nishant N Patel, Ajay K Mishra

{"title":"Charge transfer induced phase transition in Li2MnO3at high pressure.","authors":"Ajinkya P Khangal, Nishant N Patel, Ajay K Mishra","doi":"10.1088/1361-648X/ad8b8f","DOIUrl":"10.1088/1361-648X/ad8b8f","url":null,"abstract":"Efficient and better energy storage materials are of utmost technological importance to reduce energy dependence on the fossil fuels. Li2MnO3is one such material having potential to meet most of the requirements for energy storage. This material has been synthesized using solid state synthesis route. High pressure structural and vibrational studies on this material have been carried out upto ∼22 and 26 GPa respectively. These investigations show occurrence of a hitherto unknown second order phase transition to a new low symmetry phase whose symmetry is constrained to be monoclinic with space group P21/n at pressure of ∼2.3 GPa in Li2MnO3. The bulk modulus and its derivative determined by fitting theP-Vdata with third order Birch-Murnaghan equation of state are 113.3 ± 13.1 GPa and 4.1 ± 1.2 respectively. Mode Grüneisen parameter calculated for all the Raman modes show positive values which indicates the absence of any soft mode in this material. A microscopic mechanism based on bond-charge transfer is invoked and applied to understand the spectroscopic changes occurring in this material which also manifests second order structural phase transition. Enhancement in covalent character of Li-O bonds in the Li-O polyhedra is inferred based on the spectroscopic observation and above mechanism.","PeriodicalId":16776,"journal":{"name":"Journal of Physics: Condensed Matter","volume":" ","pages":""},"PeriodicalIF":2.3,"publicationDate":"2024-11-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142502583","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 order in nanogranular iron germanium (Fe_0.53Ge_0.47) films. 纳米粒状铁锗（Fe0.53Ge0.47）薄膜中的磁序。

IF 2.3 4区物理与天体物理

Journal of Physics: Condensed Matter Pub Date : 2024-11-12 DOI: 10.1088/1361-648X/ad8c0a

Ruthi Zielinski, Nhat Nguyen, Bryce Herrington, Amir Tarkian, Omar Taha, Wai Kiat Chin, Ather Mahmood, Xiaoqian Chen, Christoph Klewe, Padraic Shafer, Jim Ciston, Paul Ashby, Claudio Mazzoli, Robert Streubel

引用次数: 0

From weak- to strong-coupling superconductivity in the AlB₂-type solid solution SrGa_1-xAl_xGe with honeycomb layers. 具有蜂巢层的 AlB2 型固溶体 SrGa1-xAlxGe 中从弱耦合到强耦合的超导性。

IF 2.3 4区物理与天体物理

Journal of Physics: Condensed Matter Pub Date : 2024-11-12 DOI: 10.1088/1361-648X/ad8c0b

Dorota I Walicka, Olivier Blacque, Tomasz Klimczuk, Fabian O von Rohr

{"title":"From weak- to strong-coupling superconductivity in the AlB2-type solid solution SrGa1-xAlxGe with honeycomb layers.","authors":"Dorota I Walicka, Olivier Blacque, Tomasz Klimczuk, Fabian O von Rohr","doi":"10.1088/1361-648X/ad8c0b","DOIUrl":"10.1088/1361-648X/ad8c0b","url":null,"abstract":"We report on the structure and the superconducting properties of 9-electron 111 compounds with honeycomb layers, namely SrGaGe, SrAlGe, and the SrGa1-xAlxGe solid solution. By means of single-crystal x-ray diffraction we show that, on one hand, SrGaGe crystallizes into the centrosymmetricP6/mmmspace group (a= 4.2555(2) Å,c= 4.7288(2) Å) with statistical disorder in the [GaGe]62-honeycomb layers. On the other hand, we confirm that SrAlGe crystallizes in a non-centrosymmetric space group, namelyP6¯m2(a= 4.2942(1) Å,c= 4.7200(2) Å) with fully ordered [AlGe]62-honeycomb layers. By using magnetization and specific heat measurements, we show that the superconducting properties of SrGaGe and SrAlGe differ significantly from each other. SrGaGe is a superconductor with a critical temperature ofTc= 2.6 K falling into the weak coupling limit, while SrAlGe has aTc= 6.7 K and can be classified in the strong coupling limit. By realizing the SrGa1-xAlxGe solid solution, we were able to investigate the transition between the different crystal structures as well as the evolution of the electronic properties. We show that the transition from the weak-to strong-coupling superconductivity in this system is likely associated with the disorder-to-order transition of the honeycomb layer, along with the loss of the inversion center in the crystal structure.","PeriodicalId":16776,"journal":{"name":"Journal of Physics: Condensed Matter","volume":" ","pages":""},"PeriodicalIF":2.3,"publicationDate":"2024-11-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142522207","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

Vanadium incorporation in 2D-layered MoSe₂. 二维层 MoSe2 中的钒掺入。

IF 2.3 4区物理与天体物理

Journal of Physics: Condensed Matter Pub Date : 2024-11-11 DOI: 10.1088/1361-648X/ad8abb

João V B Del Piero, Roberto H Miwa, Wanderlã L Scopel

引用次数: 0

Geometry, anomaly, topology, and transport in Weyl fermions. 韦尔费米子的几何、反常、拓扑和传输。

IF 2.3 4区物理与天体物理

Journal of Physics: Condensed Matter Pub Date : 2024-11-11 DOI: 10.1088/1361-648X/ad8ab9

Azaz Ahmad, Gautham Varma K, Gargee Sharma

{"title":"Geometry, anomaly, topology, and transport in Weyl fermions.","authors":"Azaz Ahmad, Gautham Varma K, Gargee Sharma","doi":"10.1088/1361-648X/ad8ab9","DOIUrl":"10.1088/1361-648X/ad8ab9","url":null,"abstract":"Weyl fermions are one of the simplest objects that link ideas in geometry and topology to high-energy physics and condensed matter physics. Although the existence of Weyl fermions as elementary particles remains dubious, there is mounting evidence of their existence as quasiparticles in certain condensed matter systems. Such systems are termed Weyl semimetals (WSMs). Needless to say, WSMs have emerged as a fascinating class of materials with unique electronic properties, offering a rich playground for both fundamental research and potential technological applications. This review examines recent advancements in understanding electron transport in WSMs. We begin with a pedagogical introduction to the geometric and topological concepts critical to understanding quantum transport in Weyl fermions. We then explore chiral anomaly, a defining feature of WSMs, and its impact on transport phenomena such as longitudinal magnetoconductance and planar Hall effect. The Maxwell-Boltzmann transport theory extended beyond the standard relaxation-time approximation is then discussed in the context of Weyl fermions, which is used to evaluate various transport properties. Attention is also given to the effects of strain-induced gauge fields and external magnetic fields in both time-reversal broken and inversion asymmetric inhomogeneous WSMs. The review synthesizes theoretical insights, experimental observations, and numerical simulations to provide a comprehensive understanding of the complex transport behaviors in WSMs, aiming to bridge the gap between theoretical predictions and experimental verification.","PeriodicalId":16776,"journal":{"name":"Journal of Physics: Condensed Matter","volume":" ","pages":""},"PeriodicalIF":2.3,"publicationDate":"2024-11-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142502594","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