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We study the role of the superconducting proximity effect on the electron-phonon energy exchange in diffusive normal metals (N) attached to superconductors (S). The proximity effect modifies the spectral response of the normal metal, in…

介观与纳米尺度物理 · 物理学 2009-03-16 T. T. Heikkila , F. Giazotto

The effect of electron-optical phonon interaction on the hydrogenic impurity binding energy in a cylindrical quantum wire is studied. By using Landau and Pekar variational method, the hamiltonian is separated into two parts which contain…

介观与纳米尺度物理 · 物理学 2007-05-23 Yueh-Nan Chen , Der-San Chuu , Yuh-Kae Lin

The effect of electron-phonon (e-ph) coupling on thermal transport across metal-nonmetal interfaces is yet to be completely understood. In this paper, we use a series of molecular dynamics (MD) simulations with e-ph coupling effect included…

材料科学 · 物理学 2015-10-02 Xufei Wu , Tengfei Luo

We study the temperature relaxation dynamics of nodal-line semimetals after a sudden excitation in the presence of acoustic and optical phonon modes. We find that the nodal line constrains the electron momenta in scattering processes and,…

材料科学 · 物理学 2022-04-11 Benjamin M. Fregoso , Madhab Neupane , Anup Pradhan Sakhya

The polaron binding energy E_{p} in undoped parent cuprates has been determined to be about 1.0 eV from the unconventional oxygen-isotope effect on the antiferromagnetic ordering temperature. The deduced value of E_{p} is in quantitative…

超导电性 · 物理学 2009-11-10 Guo-meng Zhao

We analyze the effects of an electron-phonon interaction on the one-electron spectral weight A(k,omega) of a d_{x^2-y^2} superconductor. We study the case of an Einstein phonon mode with various momentum-dependent electron-phonon couplings…

超导电性 · 物理学 2009-11-10 A. W. Sandvik , D. J. Scalapino , N. E. Bickers

We report a comprehensive Raman study of the phonon behaviour in PdSe$_2$ in the temperature range of 5 K to 300 K. A remarkable change in the Raman spectrum is observed at 120 K: a significant enhancement of the out-of-plane phonon…

The transfer of heat between electrons and phonons plays a key role for thermal management in future nanowire-based devices, but only a few experimental measurements of electron-phonon (e-ph) coupling in nanowires are available. Here, we…

介观与纳米尺度物理 · 物理学 2013-02-01 Jason Matthews , Eric A. Hoffmann , Carsten Weber , Andreas Wacker , Heiner Linke

We demonstrate local detection of the electron temperature in a two-dimensionalmicrodomain using a quantum dot. Our method relies on the observation that a temperature bias across the dot changes the functional form of Coulomb-blockade…

介观与纳米尺度物理 · 物理学 2012-06-04 Simone Gasparinetti , Fabio Deon , Giorgio Biasiol , Lucia Sorba , Fabio Beltram , Francesco Giazotto

Using the weak-localization method, we have measured the electron-phonon scattering times $\tau_{ep}$ in Pd$_{60}$Ag$_{40}$ thick films prepared by DC- and RF-sputtering deposition techniques. In both series of samples, we find an anomalous…

无序系统与神经网络 · 物理学 2009-05-05 Y. L. Zhong , J. J. Lin , L. Y. Kao

We study theoretically the effect of the effective dimensionality of the phonon gas distribution on the heat exchange between electrons and phonons in layered nanostructures. If we denote the electrons temperature by $T_e$ and the phonons…

介观与纳米尺度物理 · 物理学 2019-09-04 Dragos-Victor Anghel , Claudiu Caraiani , Yuri M. Galperin

Using finite temperature Raman spectroscopy, we investigate the electron-phonon interactions (EPI) and phonon-phonon scattering dynamics in the Dirac semimetal Cd3As2 in different fre quency regimes. Strong softening of the Raman shifts…

强关联电子 · 物理学 2025-03-04 Debasmita Swain , Akash Dey , Anushree Roy , Kush Saha , Sitikantha D. Das

To understand the essential properties of Dirac crystals, such as their thermal conductivity, we require models that consider the interaction between Dirac electrons and dispersive acoustic phonons. The exceptionally high thermal…

介观与纳米尺度物理 · 物理学 2024-05-14 Sina Kazemian , Giovanni Fanchini

We analyze current-voltage characteristics taken on Au-doped indium-oxide films. By fitting a scaling function to the data, we extract the electron-phonon scattering rate as function of temperature, which yields a quadratic dependence of…

无序系统与神经网络 · 物理学 2009-11-11 Roy Ceder , Oded Agam , Zvi Ovadyahu

We report a Raman study of the effect of temperature on the self-energies of optical phonons in a number of transition metals with hexagonal-close-packed structure. Anisotropic softening of phonon energies and narrowing of phonon linewidths…

材料科学 · 物理学 2017-01-04 Yu. S. Ponosov , S. V. Streltsov

The electron-phonon interaction in monolayer graphene is investigated by using density functional perturbation theory. The results indicate that the electron-phonon interaction strength is of comparable magnitude for all four in-plane…

介观与纳米尺度物理 · 物理学 2015-05-14 K. M. Borysenko , J. T. Mullen , E. A. Barry , S. Paul , Y. G. Semenov , J. M. Zavada , M. Buongiorno Nardelli , K. W. Kim

We propose phonon spectroscopy by electric measurements of the low-temperature conductance of coupled-quantum dots, specifically employing dephasing of the quantum electronic transport by the phonons. The setup we consider consists of a…

介观与纳米尺度物理 · 物理学 2013-05-29 A. Ueda , O. Entin-Wohlman , M. Eto , A. Aharony

We present a first-principles study of the temperature- and density-dependent intrinsic electrical resistivity of graphene. We use density-functional theory and density-functional perturbation theory together with very accurate Wannier…

We have used symmetric normal metal-insulator-superconductor (NIS) tunnel junction pairs, known as SINIS structures, for ultrasensitive thermometry in the temperature range 50 - 700 mK. By Joule heating the electron gas and measuring the…

介观与纳米尺度物理 · 物理学 2007-05-23 J. T. Karvonen , L. J. Taskinen , I. J. Maasilta

We investigate the influence of the electron-phonon interaction on the decay dynamics of a quantum dot coupled to an optical microcavity. We show that the electron-phonon interaction has important consequences on the dynamics, especially…

介观与纳米尺度物理 · 物理学 2012-08-17 P. Kaer , T. R. Nielsen , P. Lodahl , A. -P. Jauho , J. Mork