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We investigate the zero and finite temperature transport properties of a quasi-two-dimensional electron gas in a GaAs/InGaAs/GaAs quantum well under a magnetic field, taking into account many-body effects via a local-field correction. We…

介观与纳米尺度物理 · 物理学 2020-06-04 Truong Van Tuan , Nguyen Quoc Khanh , Vo Van Tai , Dang Khanh Linh

GaN/AlN interfaces are essential in advanced high-power and high-frequency electronic devices, where effective thermal management is crucial for optimal performance and reliability. This work investigates the thermal boundary conductance…

介观与纳米尺度物理 · 物理学 2025-05-16 Hao Zhou , Khalid Zobaid Adnan , Wyatt Allen Jones , Tianli Feng

We have studied quantum wires using the Green's function technique and the density-functional theory, calculating the electronic structure and the conductance. All the numerics are implemented using the finite-element method with a…

介观与纳米尺度物理 · 物理学 2009-11-10 Paula Havu , Martti Puska , Risto Nieminen , Ville Havu

We propose a model with a quantized degree of freedom to study the heat transport in quasi-one dimensional system. Our simulations reveal three distinct temperature regimes. In particular, the intermediate regime is characterized by heat…

无序系统与神经网络 · 物理学 2009-11-11 Jun-Wen Mao , You-Quan Li

Density-functional theory calculations are performed to investigate hydrogen transport in the proton conductor BaSnO$_3$. Structural optimizations in the stable and saddle point configurations for transfer and reorientation allow…

材料科学 · 物理学 2014-11-13 Grégory Geneste , Alistar Ottochian , Jessica Hermet , Guilhem Dezanneau

We demonstrate experimentally an autonomous nanoscale energy harvester that utilises the physics of resonant tunnelling quantum dots. Gate defined quantum dots on GaAs/AlGaAs high-electron-mobility transistors are placed on either side of a…

介观与纳米尺度物理 · 物理学 2019-10-09 G. Jaliel , R. K. Puddy , R. Sánchez , A. N. Jordan , B. Sothmann , I. Farrer , J. P. Griffiths , D. A. Ritchie , C. G. Smith

We propose a mechanism for nanoscale energy conversion, an electric voltage induced by a temperature gradient in a junction composed of the same material having exactly the same geometric sizes, but distinct shapes. The proposed effect…

介观与纳米尺度物理 · 物理学 2020-08-26 Altug Sisman , Alhun Aydin , Jonas Fransson

We present a comprehensive study of heat transport through small superconducting point contacts. The heat current for a temperature biased weak link is computed as a function of temperature and barrier transparency of the junction. The…

超导电性 · 物理学 2009-11-10 Erhai Zhao , Tomas Lofwander , J. A. Sauls

We demonstrate high-temperature thermoelectric conversion in InAs/InP nanowire quantum dots by taking advantage of their strong electronic confinement. The electrical conductance G and the thermopower S are obtained from charge transport…

The characteristics of a thermal system depend strongly on its response to thermal gradients and the underlying microscopic interactions among constituents. In the present study, we investigate the thermodynamic and transport properties of…

高能物理 - 唯象学 · 物理学 2026-04-08 Rishabh Kumar Tiwari , Kangkan Goswami , Suraj Prasad , Captain R. Singh , Raghunath Sahoo , Mohammad Yousuf Jamal

We study the anisotropic quantum Heisenberg antiferromagnet for spin-1/2 that interpolates smoothly between the one-dimensional (1D) and the two-dimensional (2D) limits. Using the spin Hartree-Fock approach we construct a quantitative…

强关联电子 · 物理学 2019-11-22 R. Smit , P. Kopietz , O. Tsyplyatyev

We study magnetic, transport and thermodynamic properties of the half-filled two-dimensional ($2D$) Hubbard model with layered distributed repulsive interactions using unbiased finite temperature quantum Monte Carlo simulations.…

强关联电子 · 物理学 2017-02-27 Rubem Mondaini , Thereza Paiva

We present electronic transport measurements of a single wall carbon nanotube quantum dot coupled to Nb superconducting contacts. For temperatures comparable to the superconducting gap peculiar transport features are observed inside the…

介观与纳米尺度物理 · 物理学 2014-06-17 M. Gaass , S. Pfaller , T. Geiger , A. Donarini , M. Grifoni , A. K. Hüttel , C. Strunk

We calculate transport coefficients of the quark-gluon plasma (QGP) within the dynamical quasiparticle model (DQPM) by explicitly computing the parton interaction rates as a function of temperature $T$ and baryon chemical potential $\mu_B$…

核理论 · 物理学 2020-04-22 Olga Soloveva , Pierre Moreau , Elena Bratkovskaya

We report on the fabrication and electronic transport characterisation of Schottky-gated strongly confined Si/SiGe quantum point contacts (QPC). At zero magnetic field and T=450mK the QPC conductance as a function of gate voltage shows a…

介观与纳米尺度物理 · 物理学 2009-11-11 G. Scappucci , L. Di Gaspare , E. Giovine , A. Notargiacomo , R. Leoni , F. Evangelisti

Effective electron mobilities are obtained by transport measurements on InAs nanowire field-effect transistors at temperatures ranging from 10-200 K. The mobility increases with temperature below ~ 30 - 50 K, and then decreases with…

介观与纳米尺度物理 · 物理学 2013-05-27 Nupur Gupta , Yipu Song , Gregory W. Holloway , Urbasi Sinha , Chris Haapamaki , Ray R. LaPierre , Jonathan Baugh

The transport properties of the quark gluon plasma (QGP) are studied in a QCD medium at finite temperature and chemical potential. We calculate the shear viscosity $\eta(T,\mu_q)$ and the electric conductivity $\sigma_e(T,\mu_q)$ for a…

高能物理 - 唯象学 · 物理学 2015-06-11 Hamza Berrehrah , Elena Bratkovskaya , Wolfgang Cassing , Rudy Marty

I consider the non-equilibrium DC transport of electrons through a quantum system with a thermoelectric response. This system may be any nanostructure or molecule modeled by the nonlinear scattering theory which includes Hartree-like…

介观与纳米尺度物理 · 物理学 2013-03-06 Robert S. Whitney

We present a recently introduced strategy to study non-perturbatively thermal QCD up to temperatures of the order of the electro-weak scale, combining step scaling techniques and shifted boundary conditions. The former allow to renormalize…

We investigate non-equilibrium transport of charge and heat through an interacting quantum dot coupled to a finite electron reservoir. Both the quantum dot and the finite reservoir are coupled to conventional electric contacts, i.e.,…

介观与纳米尺度物理 · 物理学 2024-11-19 Stephanie Matern , Saulo V. Moreira , Peter Samuelsson , Martin Leijnse