Journal of Physics: Condensed Matter最新文献_第2页

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

Thermodynamics and dynamics of coupled complex SYK models. 耦合复杂 SYK 模型的热力学和动力学。

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/ad743a

Jan C Louw, Linda M van Manen, Rishabh Jha

{"title":"Thermodynamics and dynamics of coupled complex SYK models.","authors":"Jan C Louw, Linda M van Manen, Rishabh Jha","doi":"10.1088/1361-648X/ad743a","DOIUrl":"10.1088/1361-648X/ad743a","url":null,"abstract":"It has been known that the large-qcomplex Sachdev-Ye-Kitaev (SYK) model falls under the same universality class as that of van der Waals (mean-field) and saturates the Maldacena-Shenker-Stanford (MSS) bound, both features shared by various black holes. This makes the SYK model a useful tool in probing the fundamental nature of quantum chaos and holographic duality. This work establishes the robustness of this shared universality class and chaotic properties for SYK-like models by extending to a system of coupled large-qcomplex SYK models of different orders. We provide a detailed derivation of thermodynamic properties, specifically the critical exponents for an observed phase transition, as well as dynamical properties, in particular the Lyapunov exponent, via the out-of-time correlator calculations. Our analysis reveals that, despite the introduction of an additional scaling parameter through interaction strength ratios, the system undergoes a continuous phase transition at low temperatures, similar to that of the single SYK model. The critical exponents align with the Landau-Ginzburg (mean-field) universality class, shared with van der Waals gases and various AdS black holes. Furthermore, we demonstrate that the coupled SYK system remains maximally chaotic in the large-qlimit at low temperatures, adhering to the MSS bound, a feature consistent with the single SYK model. These findings establish robustness and open avenues for broader inquiries into the universality and chaos in complex quantum systems. We provide a detailed outlook for future work by considering the 'very' low-temperature regime, where we discuss relations with the Hawking-Page phase transition observed in the holographic dual black holes. We present preliminary calculations and discuss the possible follow-ups that might be taken to make the connection robust.","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":"142080712","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

Combined effect of strain and intrinsic spin-orbit coupling on band gap engineering of GNRs: a first-principles study. 应变和本征自旋轨道耦合对氮化镓带隙工程的联合效应：第一原理研究。

IF 2.3 4区物理与天体物理

Journal of Physics: Condensed Matter Pub Date : 2024-09-05 DOI: 10.1088/1361-648X/ad743b

Sandeep Kumar, Surender Pratap, Ravi Trivedi, Brahmananda Chakraborty

引用次数: 0

Effects of electronic correlation on topological properties of Kagome semimetal Ni₃In₂S₂. 电子关联对卡戈米半金属 Ni3In2S2 拓扑特性的影响。

IF 2.3 4区物理与天体物理

Journal of Physics: Condensed Matter Pub Date : 2024-09-05 DOI: 10.1088/1361-648X/ad7439

P Das, P Saha, M Singh, P Kumar, S Patnaik

{"title":"Effects of electronic correlation on topological properties of Kagome semimetal Ni3In2S2.","authors":"P Das, P Saha, M Singh, P Kumar, S Patnaik","doi":"10.1088/1361-648X/ad7439","DOIUrl":"10.1088/1361-648X/ad7439","url":null,"abstract":"Kagome metals gain attention as they manifest a spectrum of quantum phenomena such as superconductivity, charge order, frustrated magnetism, and allied correlated states of condensed matter. With regard to electronic band structure, several of them exhibit non-trivial topological characteristics. Here, we present a thorough investigation on the growth and the physical properties of single crystals of Ni3In2S2which is established to be a Dirac nodal line Kagome semimetal. Extensive characterization is attained through temperature and field-dependent resistivity, angle-dependent magnetoresistance (MR) and specific heat measurements. The central question we seek to address is the effect of electronic correlations in suppressing the manifestation of topological characteristics. In most metals, the Fermi liquid behaviour is restricted to a narrow range of temperatures. Here, we show that Ni3In2S2follows the Fermi-liquid behaviour up to 86 K. This phenomenon is further supported by a high Kadowaki-Woods ratio obtained through specific heat analysis. Different interpretations of the magneto-transport study reveal that MR exhibits linear behaviour, suggesting the presence of Dirac fermions at lower temperatures. The angle-dependent magneto-transport study obeys the Voigt-Thomson formula. This, on the contrary, implies the classical origin of MR. Thus, the effect of strong electron correlation in Ni3In2S2manifests itself in the anisotropic magneto-transport. Furthermore, the magnetization measurement shows the presence of de-Haas van Alphen oscillations. Calculations of the Berry phase provide insights into the topological features in the Kagome semimetal Ni3In2S2.","PeriodicalId":16776,"journal":{"name":"Journal of Physics: Condensed Matter","volume":null,"pages":null},"PeriodicalIF":2.3,"publicationDate":"2024-09-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142080707","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

Micromagnetic analysis of magnetic vortex dynamics for reservoir computing. 用于储层计算的磁涡旋动力学微磁分析。

IF 2.3 4区物理与天体物理

Journal of Physics: Condensed Matter Pub Date : 2024-09-05 DOI: 10.1088/1361-648X/ad7006

Ruoyan Feng, John Rex Mohan, Chisato Yamanaka, Yosuke Hasunaka, Arun Jacob Mathew, Yasuhiro Fukuma

引用次数: 0

Exotic phases induced by RKKY interaction in the square lattice. 方晶格中 RKKY 相互作用诱发的异相。

IF 2.3 4区物理与天体物理

Journal of Physics: Condensed Matter Pub Date : 2024-09-05 DOI: 10.1088/1361-648X/ad7346

A Vela Wac, F A Gómez Albarracín, D C Cabra

引用次数: 0

First-principles calculations to investigate phase stability, elastic and thermodynamic properties of TiMoNbX (X=Cr, Ta, Cr and Ta) refractory high entropy alloys. 通过第一性原理计算研究 TiMoNbX（X=Cr、Ta、Cr 和 Ta）难熔高熵合金的相稳定性、弹性和热力学特性。

IF 2.3 4区物理与天体物理

Journal of Physics: Condensed Matter Pub Date : 2024-09-05 DOI: 10.1088/1361-648X/ad7437

Yueyi Wang, Hongxi Liu, Xuanhong Hao, Chen Yang, Yaxia Liu, Lin Chen, Xiaowei Zhang

{"title":"First-principles calculations to investigate phase stability, elastic and thermodynamic properties of TiMoNbX (X=Cr, Ta, Cr and Ta) refractory high entropy alloys.","authors":"Yueyi Wang, Hongxi Liu, Xuanhong Hao, Chen Yang, Yaxia Liu, Lin Chen, Xiaowei Zhang","doi":"10.1088/1361-648X/ad7437","DOIUrl":"10.1088/1361-648X/ad7437","url":null,"abstract":"This work uses first-principles calculations to investigate the phase stability, thermophysical and mechanical properties of refractory high entropy alloys (RHEAs) at finite temperatures. On the basis of plane wave quasi-potential and density functional theory, construct the structure model of a solid solution. The TiMoNbX (X = Cr, Ta, Cr and Ta) RHEAs have been determined to preserve a single body-centered cubic solid solution structure by calculations and the equilibrium lattice parameters and elastic modulus are consistent with experimental data obtained by laser cladding, which is combined with TC4 (Ti-6Al-4V) substrate. Using the quasi-harmonic Debye-Grüneisen model, the thermophysical characteristics of three RHEAs are investigated. The Voigt-Reuss-Hill scheme is used for calculating the Young's modulus (E), bulk modulus (B), shear modulus (G), and Poisson's ratio (ν), which indicates that all three RHEAs are ductile materials. Additionally, the modulus and hardness of materials decrease as temperature rises, whereas the properties of TiMoNbX RHEAs are predicted, as the nanoindentation hardness values at room temperature are comparable to, and slightly higher than the calculated values.","PeriodicalId":16776,"journal":{"name":"Journal of Physics: Condensed Matter","volume":null,"pages":null},"PeriodicalIF":2.3,"publicationDate":"2024-09-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142080709","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

Heterojunction photoelectric device with fast response speed and low power consumption composed of WSSe and AlN. 由 WSSe 和 AlN 组成的异质结光电器件响应速度快、功耗低。

IF 2.3 4区物理与天体物理

Journal of Physics: Condensed Matter Pub Date : 2024-09-05 DOI: 10.1088/1361-648X/ad744b

Hanxiao Wang, Zhen Cui, Enling Li, Yang Shen, Ke Qin, Pei Yuan

引用次数: 0