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Topological semimetals are systems in which the conduction and the valence bands cross each other and this crossing is protected by topological constraints. These materials provide an intriguing test of fundamental theory and their…

强关联电子 · 物理学 2017-05-25 Marcin Matusiak , J. R. Cooper , Dariusz Kaczorowski

2H phase (trigonal prismatic D3h) of layered two-dimensional (2D) transition metal dichalcogenides (TMDs) have attracted a lot of interests due to the superior electronic and optoelectronic properties. However, flexible electronic devices…

计算物理 · 物理学 2019-06-04 Yi Wang , Zhibin Gao , Jun Zhou

It is demonstrated that the transition temperature (Tc) of high-Tc superconductors is determined by their layered crystal structure, bond lengths, valency properties of the ions, and Coulomb coupling between electronic bands in adjacent,…

超导电性 · 物理学 2012-02-03 Dale R. Harshman , Anthony T. Fiory , John D. Dow

We thoroughly investigate the microscopic mechanisms of the thermal transport in orthorhombic \textit{o}-CsCu$_5$S$_3$ by integrating the first-principles-based self-consistent phonon calculations (SCP) with the linearized Wigner transport…

材料科学 · 物理学 2024-04-17 Jincheng Yue , Jiongzhi Zheng , Junda Li , Siqi Guo , Wenling Ren , Han Liu , Yanhui Liu , Tian Cui

In the ongoing search for innovative thermoelectric (TE) materials with superior TE performance globally, we aim to investigate the possible use of half-Heusler alloy CoHfSi in TE applications. We analyzed the structure stability,…

材料科学 · 物理学 2025-06-27 Sadhana Matth , S. Pandey , Himanshu Pandey

Thermal properties of molybdenum disulfide (MoS$_2$) have recently attracted attention related to fundamentals of heat propagation in strongly anisotropic materials, and in the context of potential applications to optoelectronics and…

We calculate the temperature dependence of the transport properties of heavy-fermion systems such as resistivity, optical conductivity, thermoelectric power, the electronic part of the thermal conductivity, and the "figure of merit." The…

强关联电子 · 物理学 2009-11-11 Claas Grenzebach , Frithjof B. Anders , Gerd Czycholl , Thomas Pruschke

In this paper, we propose a computational framework, based on the VASP and phono3py computer codes, to obtain the thermoelectric figure of merit from the electron-phonon and phonon-phonon interactions using finite displacements in…

Low-dimensional electronic and glassy phononic transport are two important ingredients of highly-efficient thermoelectric material, from which two branches of the thermoelectric research emerge. One focuses on controlling electronic…

材料科学 · 物理学 2015-07-14 Xue-Ya Mi , Xiaoxiang Yu , Kai-Lun Yao , Xiaoming Huang , Nuo Yang , Jing-Tao Lü

The search for new thermoelectric materials aims at improving their power and efficiency, as expressed by thermopower $S$ and figure of merit $ZT$. By considering a very general transport spectral function $W(E)$, expressions for $S$ and…

材料科学 · 物理学 2018-04-10 Peter Zahn

In this work we calculate the thermoelectric figure of merit of XHfPb (X= Ni, Pd, and Pt) by computing the both the power factor and the lattice thermal conductivity by first principles. We make reasonable approximations: we use the…

材料科学 · 物理学 2023-01-11 Paul O. Adebambo , Gboyega A. Adebayo , Roberto Guerra , Davide Ceresoli

We have investigated the electronic and thermoelectric properties of half-Heusler alloys NiTZ (T = Sc, and Ti; Z = P, As, Sn, and Sb) having 18 valence electron. Calculations are performed by means of density functional theory and Boltzmann…

We show that synthesis-induced Metal -Insulator transition (MIT) for electronic transport along the orthorombic c axis of FeSb$_{2}$ single crystals has greatly enhanced electrical conductivity while keeping the thermopower at a relatively…

强关联电子 · 物理学 2012-10-12 Qing Jie , Rongwei Hu , Emil Bozin , A. Llobet , I. Zaliznyak , C. Petrovic , Q. Li

The temperature dependence of electronic and magnetic properties of the organic charge-transfer salt (DOEO)$_4$[HgBr$_4$]TCE was investigated using magnetometry. Electronic transport properties revealed three distinct phases which are…

The thermoelectric figure of merit ZT, which is defined using electrical conductivity, Seebeck coefficient, thermal conductivity, and absolute temperature T, has been widely used as a simple estimator of the conversion efficiency of a…

应用物理 · 物理学 2020-05-18 Byungki Ryu , Jaywan Chung , Eun-Ae Choi , Pawel Ziolkowski , Eckhard Müller , SuDong Park

The paper deals with thermoelectric figure of merit of the superlattice materials. It is shown,that two-dimensional character of band spectrum of thermoelectric material may increase the power factor,but not the thermoelectric figure of…

介观与纳米尺度物理 · 物理学 2015-02-26 P. V. Gorskyi

We present results of electronic band structure, Fermi surface and electron transport properties calculations in orthorhombic $n$- and $p$-type SnSe, applying Korringa-Kohn-Rostoker method and Boltzmann transport approach. The analysis…

材料科学 · 物理学 2015-05-11 K. Kutorasinski , B. Wiendlocha , S. Kaprzyk , J. Tobola

The thermoelectric properties of MoS2 armchair nanoribbons with different width are studied by using first-principles calculations and Boltzmann transport theory, where the relaxation time is predicted from deformation potential theory. Due…

介观与纳米尺度物理 · 物理学 2015-02-24 D. D. Fan , H. J. Liu , L. Cheng , P. H. Jiang , J. Shi , X. F. Tang

Ferroelectrics with spontaneous electric polarization play an essential role in today's device engineering, such as capacitors and memories. Their physical properties are further enriched by suppressing the long-range polar order, as is…

材料科学 · 物理学 2017-03-14 H. Sakai , K. Ikeura , M. S. Bahramy , N. Ogawa , D. Hashizume , J. Fujioka , Y. Tokura , S. Ishiwata

Using density functional theory calculations with spin-orbit coupling (SOC), we report on the temperature-dependent thermodynamical properties of Pb: electrical resistivity, thermal expansion (TE), heat capacity, bulk modulus and its…

材料科学 · 物理学 2025-03-13 Félix Antoine Goudreault , Samuel Poncé , Feliciano Giustino , Michel Côté