Journal of Physics: Condensed Matter最新文献

Topological phases of tight-binding trimer lattice in the BDI symmetry class. BDI 对称类中紧密结合三聚体晶格的拓扑阶段。

IF 2.3 4区物理与天体物理

Journal of Physics: Condensed Matter Pub Date : 2024-09-06 DOI: 10.1088/1361-648X/ad744c

Mohammad Ghuneim, Raditya Weda Bomantara

引用次数: 0

Anti-matching effect in a two dimensional driven vortex lattice in the presence of periodic pinning. 二维驱动旋涡晶格中存在周期性针销时的反匹配效应。

IF 2.3 4区物理与天体物理

Journal of Physics: Condensed Matter Pub Date : 2024-09-06 DOI: 10.1088/1361-648X/ad743c

Akhilesh M P, Toby Joseph

{"title":"Anti-matching effect in a two dimensional driven vortex lattice in the presence of periodic pinning.","authors":"Akhilesh M P, Toby Joseph","doi":"10.1088/1361-648X/ad743c","DOIUrl":"10.1088/1361-648X/ad743c","url":null,"abstract":"The dynamics of a driven superconducting vortex lattice in a two-dimensional (2D) periodic potential of square symmetry is studied using Brownian dynamics simulations. The range and strength of the vortex-substrate interaction are taken to be of the same order as that of the vortex-vortex interaction. The matching effect in a driven vortex lattice in the presence of a periodic array of pinning centers refers to the enhanced resistance to the vortex lattice motion when the ratio of the number of vortices to the number of pinning centers (called the filling fraction) takes simple fractional values. In particular, one expects a pronounced matching effect when the filling fraction is one. Contrary to this expectation, a drop in the vortex lattice mobility is observed as the filling fraction is increased from value one. This anti-matching effect can be understood in terms of the structural change in the vortex lattice as the filling fraction is varied. The dip observed in vortex mobility as a function of temperature when the filling fraction equals one (Joseph T 2020PhysicaA556124737), is studied for other values of filling above and below one. The behavior is found to persist for other fillings as well and is associated with the melting of the vortex lattice. The temperature at which the lattice melts is found to increase with drive and explains the shift in the temperature at which mobility is a minimum, locally.","PeriodicalId":16776,"journal":{"name":"Journal of Physics: Condensed Matter","volume":null,"pages":null},"PeriodicalIF":2.3,"publicationDate":"2024-09-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142080703","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

Weak antilocalization in the topological semimetal candidate YbAuSb. 拓扑半金属候选物质 YbAuSb 中的弱反聚焦。

IF 2.3 4区物理与天体物理

Journal of Physics: Condensed Matter Pub Date : 2024-09-06 DOI: 10.1088/1361-648X/ad6f8a

D Ram, S Banerjee, A Sundaresan, D Samal, Z Hossain

{"title":"Weak antilocalization in the topological semimetal candidate YbAuSb.","authors":"D Ram, S Banerjee, A Sundaresan, D Samal, Z Hossain","doi":"10.1088/1361-648X/ad6f8a","DOIUrl":"10.1088/1361-648X/ad6f8a","url":null,"abstract":"We report a study of the magnetic and magnetotransport properties of YbAuSb single crystals, which were grown using the bismuth flux. The x-ray diffraction data indicate that YbAuSb crystallizes in LiGaGe-type hexagonal structure with space groupP63mc. Our magnetic measurements revealed that YbAuSb is nonmagnetic with a divalent state of ytterbium ion. The temperature-dependent electrical resistivity exhibits a metallic behavior. A cusp-like feature in transverse and longitudinal magnetoresistance is observed at the low field regime. This cusp-like feature is attributed to the weak antilocalization (WAL) effect, which is more prominent at low temperatures. The transverse magnetoconductivity in low field region follows semiclassical model∼B, which is consistent with the presence of WAL phenomena. The WAL effect in transverse and longitudinal magnetoconductance is well explained using the modified Hikami-Larkin-Nagaoka and generalized Altshuler-Aronov model, respectively. The Hall resistivity shows a linear field dependence with a positive slope, suggesting hole charge carriers dominate in electrical transport. The calculated carrier density and mobility are in the order of 1020 cm-3and 102 cm2 V-1 s-1, respectively.","PeriodicalId":16776,"journal":{"name":"Journal of Physics: Condensed Matter","volume":null,"pages":null},"PeriodicalIF":2.3,"publicationDate":"2024-09-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141982509","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

Low-temperature magnetic properties of theS= 1/2 kagomé antiferromagnet YCo₃(OH)_6.55Br_2.45. S = 1/2 卡戈梅反铁磁体 YCo3(OH)6.55Br2.45 的低温磁性能。

IF 2.3 4区物理与天体物理

Journal of Physics: Condensed Matter Pub Date : 2024-09-06 DOI: 10.1088/1361-648X/ad7434

Zhenwei Yu, Hui Liang, Yiyan Wang, Na Li, Yan Sun, Dandan Wu, Ying Zhou, Zongling Ding, Jin Sun, Tianbo He, Ziyang Wu, Junfeng Wang, Xuefeng Sun, Qiuju Li

引用次数: 0

Rich Magnon Topology in Triangular Lattice Magnets. 三角形晶格磁体中丰富的马格农拓扑结构

IF 2.3 4区物理与天体物理

Journal of Physics: Condensed Matter Pub Date : 2024-09-06 DOI: 10.1088/1361-648X/ad7805

Haodong Yu, Lin Hu, Fawei Zheng, Yu-Gui Yao

引用次数: 0

Magnetism of pseudospin-1/2 pyrochlore antiferromagnet Na₃Co(CO₃)₂Cl. 伪自旋-1/2 锆石反铁磁体 Na3Co(CO3)2Cl 的磁性。

IF 2.3 4区物理与天体物理

Journal of Physics: Condensed Matter Pub Date : 2024-09-06 DOI: 10.1088/1361-648X/ad7182

Kazuhiro Nawa, Ryo Murasaki, Shinichi Itoh, Hiraku Saito, Hiroyuki Nojiri, Clarina Dela Cruz, Daisuke Okuyama, Masahiro Yoshida, Daichi Ueta, Hideki Yoshizawa, Taku J Sato

{"title":"Magnetism of pseudospin-1/2 pyrochlore antiferromagnet Na3Co(CO3)2Cl.","authors":"Kazuhiro Nawa, Ryo Murasaki, Shinichi Itoh, Hiraku Saito, Hiroyuki Nojiri, Clarina Dela Cruz, Daisuke Okuyama, Masahiro Yoshida, Daichi Ueta, Hideki Yoshizawa, Taku J Sato","doi":"10.1088/1361-648X/ad7182","DOIUrl":"10.1088/1361-648X/ad7182","url":null,"abstract":"Pyrochlore magnets have attracted interest as systems for realizing critical phenomena, rich magnetic structures, associated topological band structures, and nontrivial quantum phases. Na3Co(CO3)2Cl is a pseudospin-1/2 antiferromagnet in which the Co2+ions form a pyrochlore network. Its structural and magnetic properties were investigated using magnetization, heat capacity, ESR, single-crystal x-ray diffraction, powder neutron diffraction and powder inelastic neutron scattering. Magnetization and heat capacity measurements indicated a ground-state doublet, which is regarded as pseudospin 1/2, dominated the magnetic properties at low temperatures, with a magnetic exchange of 9.6 K. As the temperature decreases, a magnetic transition is observed at 1.6 K, which is confirmed to be an all-in-all-out magnetic order. The crystal field excitations observed by inelastic neutron scattering experiments indicated the Ising nature of the ground-state doublet. This thorough study revealed that Na3Co(CO3)2Cl can be regarded as a pseudospin-1/2 pyrochlore lattice antiferromagnet with dominant Ising-type interactions.","PeriodicalId":16776,"journal":{"name":"Journal of Physics: Condensed Matter","volume":null,"pages":null},"PeriodicalIF":2.3,"publicationDate":"2024-09-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142008955","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

Decoding disorder signatures of AuCl₃and vacancies in MoS₂films: from synthetic to experimental inversion. 解码 MoS2 膜中 AuCl3 和空位的无序特征：从合成到实验的反转。

IF 2.3 4区物理与天体物理

Journal of Physics: Condensed Matter Pub Date : 2024-09-06 DOI: 10.1088/1361-648X/ad7568

F R Duarte, F Matusalem, D Grasseschi, A R Rocha, Leandro Seixas, Christiano J S de Matos, S Mukim, M S Ferreira

{"title":"Decoding disorder signatures of AuCl3and vacancies in MoS2films: from synthetic to experimental inversion.","authors":"F R Duarte, F Matusalem, D Grasseschi, A R Rocha, Leandro Seixas, Christiano J S de Matos, S Mukim, M S Ferreira","doi":"10.1088/1361-648X/ad7568","DOIUrl":"10.1088/1361-648X/ad7568","url":null,"abstract":"This study investigates the scope of application of a recently designed inversion methodology that is capable of obtaining structural information about disordered systems through the analysis of their conductivity response signals. Here we demonstrate that inversion tools of this type are capable of sensing the presence of disorderly distributed defects and impurities even in the case where the scattering properties of the device are only weakly affected. This is done by inverting the DC conductivity response of monolayered MoS2films containing a minute amount of AuCl3coordinated complexes. Remarkably, we have successfully extracted detailed information about the concentration of AuCl3by decoding its signatures on the transport features of simulated devices. In addition to the case of theoretically generated Hamiltonians, we have also carried out a full inversion procedure from experimentally measured signals of similar structures. Based on experimental input signals of MoS2with naturally occurring vacancies, we were able to quantify the vacancy concentration contained in the samples, which indicates that the inversion methodology has experimental applicability as long as the input signal is able to resolve the characteristic contributions of the type of disorder in question. Being able to handle more complex, realistic scenarios unlocks the method's applicability for designing and engineering even more elaborate materials.","PeriodicalId":16776,"journal":{"name":"Journal of Physics: Condensed Matter","volume":null,"pages":null},"PeriodicalIF":2.3,"publicationDate":"2024-09-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142108602","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

Magnetotransport and angle-resolved photoemission spectroscopy of MnSb₁₂Te₁₉: a new member of MnSb_2nTe_3n+1family. MnSb2nTe3n+1家族新成员MnSb12Te19的磁传输和角度分辨光发射光谱。

IF 2.3 4区物理与天体物理

Journal of Physics: Condensed Matter Pub Date : 2024-09-06 DOI: 10.1088/1361-648X/ad7806

Mohit Mudgal, Priyanka Meena, Vishnu Kumar Tiwari, Venkateswara Yenugonda, Vivek K Malik, Jens Buck, Kai Rossnagel, Sanjoy Kumar Mahatha, Jayita Nayak

{"title":"Magnetotransport and angle-resolved photoemission spectroscopy of MnSb12Te19: a new member of MnSb2nTe3n+1family.","authors":"Mohit Mudgal, Priyanka Meena, Vishnu Kumar Tiwari, Venkateswara Yenugonda, Vivek K Malik, Jens Buck, Kai Rossnagel, Sanjoy Kumar Mahatha, Jayita Nayak","doi":"10.1088/1361-648X/ad7806","DOIUrl":"https://doi.org/10.1088/1361-648X/ad7806","url":null,"abstract":"The quest for intrinsically ferromagnetic topological materials is a focal point in the study of topological phases of matter, as intrinsic ferromagnetism plays a vital role in realizing exotic properties such as the anomalous Hall effect (AHE) in quasi-two-dimensional materials, and this stands out as one of the most pressing concerns within the field. Here, we investigate a novel higher ordermember of the MnSb2nTe3n+1family, MnSb12Te19, for the first time combining magnetotransport and angle-resolved photoemission spectroscopy (ARPES) measurements. Our magnetic susceptibility experiments identify ferromagnetic transitions at temperature Tc= 18.7 K, consistent with our heat capacity measurements (T=18.8 K). The AHE is observed for the field along the c-axis below Tc. Our study of Shubinikov-de-Haas (SdH) oscillations provides evidence for Dirac fermions with π Berry phase. Our comprehensive investigation reveals that MnSb12Te19exhibits a FM ground state along with AHE, and hole-dominated transport properties consistent with ARPES measurements.","PeriodicalId":16776,"journal":{"name":"Journal of Physics: Condensed Matter","volume":null,"pages":null},"PeriodicalIF":2.3,"publicationDate":"2024-09-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142145875","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

A multi-orbital Hund's rules-based ionic Hamiltonian for transition metal atoms: high-order equation of motion method approach and Kondo resonances. 过渡金属原子的基于 Hund´s 规则的多轨道离子哈密顿：高阶运动方程法方法和 Kondo 共振。

IF 2.3 4区物理与天体物理

Journal of Physics: Condensed Matter Pub Date : 2024-09-06 DOI: 10.1088/1361-648X/ad6bdc

E C Goldberg, M S Tacca, F Flores

引用次数: 0

Exploring Charge Transfer and Schottky Barrier Modulation at Monolayer Ge₂Sb₂Te₅-Metal Interfaces. 探索单层 Ge2Sb2Te5 金属界面的电荷转移和肖特基势垒调制。

IF 2.3 4区物理与天体物理

Journal of Physics: Condensed Matter Pub Date : 2024-09-06 DOI: 10.1088/1361-648X/ad7804

Xiaoying Wan, Chengqi Zhang, Jiahui Li, Zhaofu Zhang, Qingbo Wang, Hai Wang, Jun Liu, Hong-Xia Zhong

{"title":"Exploring Charge Transfer and Schottky Barrier Modulation at Monolayer Ge2Sb2Te5-Metal Interfaces.","authors":"Xiaoying Wan, Chengqi Zhang, Jiahui Li, Zhaofu Zhang, Qingbo Wang, Hai Wang, Jun Liu, Hong-Xia Zhong","doi":"10.1088/1361-648X/ad7804","DOIUrl":"https://doi.org/10.1088/1361-648X/ad7804","url":null,"abstract":"Monolayer Ge2Sb2Te5exhibits great potential in non-volatile memory technology due to its excellent electronic properties and phase-change characteristics, while the fundamental nature of Ge2Sb2Te5-metal contacts has not been well understood yet. Here, we provide a comprehensive ab initio study of the electronic properties between monolayer Ge2Sb2Te5and Pt, Pd, Au, Cu, Cr, Ag, and W contacts based on first-principles calculations. We find that the strong interaction interfaces formed between monolayer Ge2Sb2Te5and Pt, Pd, Cr, and W contacts show chemical bonding and strong charge transfer. In contrast, no apparent chemical bonding and weak charge transfer are observed in the weak interaction interfaces formed with Au, Cu, and Ag. Additionally, our study reveals the presence of a pronounced Fermi level pinning effect between monolayer Ge2Sb2Te5and metals, with pinning factors ofSn=0.325 andSp=0.350. By increasing the interlayer distance, an effective transition from n-type Ohmic contact to n-type Schottky contact is facilitated because the band edge of Ge2Sb2Te5is shifted upwards. Our study not only provides a theoretical basis for selecting suitable metal electrodes in Ge2Sb2Te5-based devices but also holds significant implications for understanding Schottky barrier height modulation between semiconductors and metals.","PeriodicalId":16776,"journal":{"name":"Journal of Physics: Condensed Matter","volume":null,"pages":null},"PeriodicalIF":2.3,"publicationDate":"2024-09-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142145874","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