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Electron transport through fully depleted ferroelectric tunnel barriers sandwiched between two metal electrodes and its dependence on ferroelectric polarization direction are investigated. The model assumes a polarization direction…

材料科学 · 物理学 2010-10-07 Daniel Pantel , Marin Alexe

We investigate transport in a granular metallic system at large tunneling conductance between the grains, $g_T\gg 1$. We show that at low temperatures, $T\leq g_T\delta $, where $\delta$ is the single mean energy level spacing in a grain,…

介观与纳米尺度物理 · 物理学 2009-11-10 I. S. Beloborodov , K. B. Efetov , A. V. Lopatin , V. M. Vinokur

Mysterious high temperature structureless transitions in (TMTTF)2X compounds have been discovered in mid 80's (Coulon, Lawersanne,vet al), but left unexplained and abandoned, together with other warnings from structural effects (Moret,…

强关联电子 · 物理学 2007-05-23 Serguei Brazovskii

A ferroelectric is a material with a polar structure whose polarity can be reversed by applying an electric field. In metals, the itinerant electrons tend to screen electrostatic forces between ions, helping to explain why polar metals are…

The electron transport though ferromagnetic metal-superconducting hybrid devices is considered in the non-equilibrium Green's function formalism in the quasiclassical approximation. Attention if focused on the limit in which the exchange…

超导电性 · 物理学 2009-10-31 W. Belzig , Arne Brataas , Yu. V. Nazarov , Gerrit E. W. Bauer

We have systematically investigated the electrical transport properties of polycrystalline TaN$_x$ ($0.83$$\lesssim$$x$$\lesssim$1.32) films with rocksalt structure from 300 down to 2 K. It is found that the conductivity varies linearly…

介观与纳米尺度物理 · 物理学 2018-07-04 Ran Li , Xiu-Zhi Duan , Xin Zhu , Yang Yang , Ding-Bang Zhou , Zhi-Qing Li

We explore electron transport properties in molecular wires made of heterocyclic molecules (pyrrole, furan and thiophene) by using the Green's function technique. Parametric calculations are given based on the tight-binding model to…

介观与纳米尺度物理 · 物理学 2009-09-13 Santanu K. Maiti , S. N. Karmakar

Motivated by the experimental measurement of electrical and hall conductivity, thermopower and Nernst effect, we calculate the longitudinal and transverse electrical and heat transport in graphene in the presence of unitary scatterers as…

材料科学 · 物理学 2015-05-19 Vincent Ugarte , Vivek Aji , C. M. Varma

The collective amplitude mode of the order parameter in displacive ferroelectrics, termed the ferron, represents the amplitude fluctuations of long-range ordered polarization. At temperatures well below phase transition temperature $T_c$,…

材料科学 · 物理学 2025-07-30 G. D. Zhao , F. Yang , L. Q. Chen

We simulate the electronic and transport properties of metal/two-dimensional material/metal vertical heterostructures, with a focus on graphene, hexagonal boron nitride and two phases of molybdenum diselenide. Using density functional…

介观与纳米尺度物理 · 物理学 2025-02-06 Gaëlle Bigeard , Zineb Kerrami , François Triozon , Alessandro Cresti

A variety of compounds, for example doped paraelectrics and polar metals, exhibit both ferroelectricity and correlated electronic phenomena such as low-density superconductivity and anomalous transport. Characterizing such properties is…

强关联电子 · 物理学 2023-07-19 Avraham Klein , Vladyslav Kozii , Jonathan Ruhman , Rafael M. Fernandes

The electrical, thermal conductivity and Seebeck coefficient of the quenched, annealed and slowly cooled phases of the layer compound CuCrS2 have been reported between 15K to 300K. We also confirm the antiferromagnetic transition at 40K in…

强关联电子 · 物理学 2015-05-13 G. C. Tewari , T. S. Tripathi , A. K. Rastogi

Maxwell's equations incorporating thermoelectric and thermomagnetic effects are studied. Energy transport involving electric field only flows along the velocity direction and a direction perpendicular to it. Magnetic energy transport…

综合物理 · 物理学 2017-09-12 A. I. Arbab

In a recent paper [R. Soto-Garrido and E. Mu\~noz, J. Phys. Condens. Matter 30, 195302 (2018)], we studied the electronic transport properties in Weyl semimetals (WSMs) submitted to the combined effects of torsional mechanical strain and…

介观与纳米尺度物理 · 物理学 2018-12-07 Enrique Muñoz , Rodrigo Soto-Garrido

We investigate the electron-transport properties of ethyne-bridged diphenyl zinc-porphyrin molecules suspended between gold (111) electrodes by first-principles calculations within the framework of density functional theory. It is found…

材料科学 · 物理学 2024-01-09 Huy Duy Nguyen , Tomoya Ono

Antiferromagnet materials have recently gained renewed interest due to their possible use in spintronics technologies, where spin transport is the foundation of their functionalities. In that respect metallic antiferromagnets are of…

Although the electrical transport properties of mesoscopic metallic samples have been investigated extensively over the past two decades, the thermal properties have received far less attention. This may be due in part to the difficulty of…

介观与纳米尺度物理 · 物理学 2009-11-07 D. A. Dikin , S. Jung , V. Chandrasekhar

Carbon nanofibres (CNF) were dispersed into an epoxy resin using a combination of ultrasonication and mechanical mixing. The electronic transport properties of the resulting composites were investigated by means of impedance spectroscopy.…

材料科学 · 物理学 2008-02-29 Aïssa Allaoui , Suong V. Hoa , Martin D. Pugh

We theoretically study the conductivity in arrays of metallic grains due to the variable-range multiple cotunneling of electrons with short-range (screened) Coulomb interaction. The system is supposed to be coupled to random stray charges…

无序系统与神经网络 · 物理学 2017-06-14 A. S. Ioselevich , V. V. Sivak

The relation between the conductivity tensors of Composite Fermions and electrons is extended to second generation Composite Fermions. It is shown that it crucially depends on the coupling matrix for the Chern-Simons gauge field. The…

介观与纳米尺度物理 · 物理学 2016-08-16 Matteo Merlo , Nicodemo Magnoli , Maura Sassetti , Bernhard Kramer