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In this work, we aim to study the thermal properties of materials using classical molecular dynamics simulations and specialized numerical methods. We focus primarily on the thermal conductivity \kappa using non-equilibrium molecular…

材料科学 · 物理学 2017-05-03 Jonathan Severin , Philippe Jund

Ab initio Green-Kubo (aiGK) simulations of heat transport in solids allow for assessing lattice thermal conductivity in anharmonic or complex materials from first principles. In this work, we present a detailed account of their practical…

材料科学 · 物理学 2023-06-14 Florian Knoop , Matthias Scheffler , Christian Carbogno

For the development of nanoscale electronics and photonics using atomically thin two-dimensional (2D) materials, it is important to realize van der Waals (vdW) interfaces with low thermal resistance, to minimize performance reduction caused…

Starting from an {\it ab initio}-derived two-site dimer Hubbard hamiltonian on a triangular lattice, we calculate the superconducting gap functions and critical temperatures for representative $\kappa$-(BEDT-TTF)$_2$X superconductors by…

超导电性 · 物理学 2018-02-02 Karim Zantout , Michaela Altmeyer , Steffen Backes , Roser Valenti

Slack's phonon-glass and electron-crystal concept has been the guiding paradigm for designing new thermoelectric materials. Zintl phases, in principle, have been shown as great contenders of the concept and thereby good thermoelectric…

材料科学 · 物理学 2025-11-11 Vivek Gusain , Mohd Zeeshan , B. K. Mani

In aluminium electrolysis cells, a ledge of frozen electrolyte is formed, attached to the sides of the cell. The control of the side ledge thickness is essential in ensuring a reasonable lifetime for the cells. Numerical modelling of the…

材料科学 · 物理学 2016-09-30 Aimen E. Gheribi , Patrice Chartrand

Lattice thermal conductivity ($\kappa_{\rm L}$) is a crucial characteristic of crystalline solids with significant implications for practical applications. While the higher order of anharmonicity of phonon gas model is commonly used for…

材料科学 · 物理学 2024-04-10 Jiacheng Wei , Zhonghao Xia , Yi Xia , Jiangang He

The Cooperative Motion Algorithm is an efficient lattice method to simulate dense polymer systems and is often used with two different criteria to generate a Markov chain in the configuration space. While the first method is the…

统计力学 · 物理学 2016-11-18 Piotr Knychala , Michal Banaszak

Fabrication and characterization of instrument for high-temperature simultaneous measurement of Seebeck coefficient (S) and thermal conductivity ($\kappa$) has been carried out with python automation. The steady-state based Fourier's law of…

材料科学 · 物理学 2022-04-20 Shamim Sk , Abhishek Pandey , Sudhir K. Pandey

Thermal conductivity coefficient $\kappa$ measures the ability of a material to conduct a heat current. In particular, $\kappa$ is an important property that often dictates the usefulness of a material over a wide range of environmental…

软凝聚态物质 · 物理学 2024-10-23 Debashish Mukherji

The lattice thermal conductivities of silicon clathrate frameworks II and VIII are investigated by using ab initio lattice dynamics and iterative solution of the linearized Boltzmann transport equation(BTE) for phonons. Within the…

材料科学 · 物理学 2016-04-26 Ville J. Härkönen , Antti J. Karttunen

Lattice thermal conductivities (LTCs) of \alpha-, \beta-, and \gamma-Si$_3$N$_4$ single crystals are investigated from ab initio anharmonic lattice dynamics, within the single-mode relaxation-time approximation of the linearized phonon…

材料科学 · 物理学 2016-12-28 Kazuyoshi Tatsumi , Atsushi Togo , Isao Tanaka

The value measured in the amorphous structure with the same chemical composition is often considered as a lower bound for the thermal conductivity of any material: the heat carriers are strongly scattered by disorder, and their lifetimes…

材料科学 · 物理学 2015-09-17 Hideyuki Mizuno , Stefano Mossa , Jean-Louis Barrat

In this work, we systematically investigate the lattice thermal conductivity ($\kappa_L$) of LaMoN$_3$ in the $C$2/$c$ and $R$3$c$ phases using first-principles calculations combined with the Boltzmann transport equation. In the $C$2/$c$…

材料科学 · 物理学 2025-04-02 Manjari Jain , Sanchi Monga , Saswata Bhattacharya

We study the electronic thermal conductivity $\kappa_\textrm{el}$ and the thermal diffusion constant $D_\textrm{Q,el}$ in the square lattice Hubbard model using the finite-temperature Lanczos method. We exploit the Nernst-Einstein relation…

强关联电子 · 物理学 2022-12-28 Martin Ulaga , Jernej Mravlje , Peter Prelovšek , Jure Kokalj

This paper proposes a topology optimization method for non-thermal and thermal fluid problems using the Lattice Kinetic Scheme (LKS).LKS, which is derived from the Lattice Boltzmann Method (LBM), requires only macroscopic values, such as…

数值分析 · 数学 2024-11-06 Yuta Tanabe , Kentaro Yaji , Kuniharu Ushijima

To gain insight into the peculiar temperature dependence of the thermoelectric material SnSe, we employ many-body perturbation theory and explore the influence of the electron-phonon interaction on its electronic and transport properties.…

材料科学 · 物理学 2019-05-23 Fabio Caruso , Maria Troppenz , Santiago Rigamonti , Claudia Draxl

Lattice models are crucial for studying thermodynamic properties in many physical, biological and chemical systems. We investigate Lattice Restricted Primitive Model (LRPM) of electrolytes with different discretization parameters in order…

统计力学 · 物理学 2009-11-11 Maxim N. Artyomov , Anatoly B. Kolomeisky

A theory of electron-phonon mediated superconductivity requires the knowledge of full phonon spectrum to calculate superconducting transition temperature, T$_c$. However, there is no experimental technique which can measure phonon spectrum…

超导电性 · 物理学 2020-08-04 E. F. Talantsev

The intermetallic compound ZnSb is an interesting thermoelectric material, largely due to its low lattice thermal conductivity. The origin of the low thermal conductivity has so far been speculative. Using multi-temperature single crystal…