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The electronic properties of the layered black phosphorus (black-P) and its monolayer counterpart phosphorene are investigated by using the first-principles calculations based on the density functional theory (DFT). The room-temperature…

材料科学 · 物理学 2014-04-22 H. Y. Lv , W. J. Lu , D. F. Shao , Y. P. Sun

The conventional thermoelectric figure of merit and the power factor are not sufficient as a measure of thin film quality of thermoelectric materials, where the power conversion efficiency depends on the film dimensions. By considering the…

应用物理 · 物理学 2022-07-19 Kazuhiko Seki , Masakazu Mukaida , Qingshuo Wei , Takao Ishida

Metallic thermoelectric materials are promising candidates for active cooling applications, where high thermal conductivity and a high thermoelectric power factor are essential to maximize effective thermal conductivity. While metals…

Although quasiparticles in flat bands have zero group velocity, they can display an anomalous velocity due to the quantum geometry. We address the thermal and thermoelectric transport in flat bands in the clean limit with a small amount of…

介观与纳米尺度物理 · 物理学 2025-06-02 Kevin Wen , Hong-Yi Xie , Assa Auerbach , Bruno Uchoa

Thermoelectric materials intrigue much interest due to their wide range of application such as power generators and refrigerators. The efficiency of thermoelectric materials is quantified by the figure of merit, and a figure greater than…

介观与纳米尺度物理 · 物理学 2022-02-16 Masashi Hosoi , Ikuma Tateishi , Hiroyasu Matsuura , Masao Ogata

The effect of electron-phonon scattering processes over the thermoelectric properties of extrinsic graphene was studied. Electrical and thermal resistivity, as well as the thermopower, were calculated within the Bloch theory approximations.…

介观与纳米尺度物理 · 物理学 2012-08-02 Enrique Muñoz

Using wave function matching approach and employing the Landauer-Buttiker formula a ferromagnetic graphene junction with a temperature gradient across the system, is studied. We calculate the thermally induced charge and spin current as…

介观与纳米尺度物理 · 物理学 2016-08-24 Javad Vahedi , Fattaneh Barimani

The electronic and thermoelectric (TE) transport properties of 13 n-type and p-type half-Heusler alloys are computationally examined using Boltzmann transport. The electronic scattering times resulting from all relevant phonon interactions…

The heat transport in heavy-doped n-GaAs has been investigated at temperatures T=300 K and 77 K using the irradiation of the metal-semiconductor contact by modulated CO_{2}-laser radiation. It is shown this approach giving an opportunity to…

材料科学 · 物理学 2007-05-23 A. Ya. Shul'man , N. A. Mordovets , I. N. Kotel'nikov

We study the electric and thermal transport of the Dirac carriers in monolayer graphene using the Boltzmann-equation approach. Motivated by recent thermopower measurements [F. Ghahari, H.-Y.~Xie, T. Taniguchi, K. Watanabe, M.~S.~Foster, and…

介观与纳米尺度物理 · 物理学 2016-05-03 Hong-Yi Xie , Matthew S. Foster

We report measurements of the Seebeck effect in both the $ab$ plane ($S_{\rm a}$) and along the $c$ axis ($S_{\rm c}$) of the cuprate superconductor La$_{1.6-x}$Nd$_{0.4}$Sr$_{x}$CuO$_4$ (Nd-LSCO), performed in magnetic fields large enough…

In the present work, thermal transport and energy conversation in two thermoelectrically efficient candidates of Janus SnSSe and SnS$_2$ are investigated within the non-equilibrium Monte Carlo simulation of phonon Boltzmann equation. The…

介观与纳米尺度物理 · 物理学 2024-04-12 Seyedeh Ameneh Bahadori , Zahra Shomali

The geometric characteristics of Bloch wave functions play a crucial role in electronic transport properties. We show that the thermoelectric performance of materials is governed by the geometric structure of Bloch wave functions within the…

介观与纳米尺度物理 · 物理学 2024-08-09 Chang-geun Oh , Kun Woo Kim , Jun-Won Rhim

This is a numerical study of thermoelectric properties of ballistic bilayer graphene in the presence of trigonal warping term in the effective Hamiltonian. We find, in the mesoscopic samples of the length $L>10\,\mu{}$m at sub-Kelvin…

介观与纳米尺度物理 · 物理学 2018-03-06 Dominik Suszalski , Grzegorz Rut , Adam Rycerz

The Seebeck coefficient is examined for two-dimensional Dirac electrons in the three-quarter filled organic conductor alpha-(BEDT-TTF)_2I_3 under hydrostatic pressure, where the Seebeck coefficient is proportional to the ratio of the…

介观与纳米尺度物理 · 物理学 2024-04-10 Yoshikazu Suzumura , Takao Tsumuraya , Masao Ogata

Th$_3$Te$_4$ materials are potential candidates for commercial thermoelectric (TE) materials at high-temperature due to their superior physical properties. We incorporate the multiband Boltzmann transport equations with firstprinciples…

材料科学 · 物理学 2023-01-10 Jizhu Hu Jinxin Zhong Jun Zhou

It has been proposed that paramagnetic materials exhibit a unique thermoelectric effect near the ferromagnetic transition point due to spin fluctuations. This phenomenon is often referred to as paramagnon drag. We calculate the contribution…

强关联电子 · 物理学 2022-01-12 Junya Endo , Hiroyasu Matsuura , Masao Ogata

We obtained the analytical expression for the effective thermoelectric properties and dimensionless figure of merit of a composite with interfacial electrical and thermal resistances using a micromechanics-based homogenisation. For the…

材料科学 · 物理学 2018-12-11 Jiyoung Jung , Sangryun Lee , Byungki Ryu , Seunghwa Ryu

Transport and thermoelectric coefficients (including also spin thermopower) of silicene nanoribbons with zigzag edges are investigated by {\it ab-initio} numerical methods. Local spin density of such nanoribbons reveals edge magnetism. Like…

材料科学 · 物理学 2015-06-16 K. Zberecki , M. Wierzbicki , J. Barnaś , R. Swirkowicz

We present a new method for predicting effective thermal conductivity ($\kappa_{\textrm{eff}}$) in materials, informed by ${ab\,initio}$ material property simulations. Using the Boltzmann transport equation in a Self-Adjoint Angular Flux…

材料科学 · 物理学 2019-08-22 Jackson R. Harter , Aria Hosseini , Todd. S. Palmer , P. Alex Greaney