Thermoelectric effects in normal metal/superconductor interface structures

Eom, Jonghwa; Chien, C. J.; Chandrasekhar, Venkat

doi:10.1006/spmi.1999.0735

Cited by 8 publications

(4 citation statements)

References 21 publications

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“…1). In these and in numerous subsequent experiments 13,14,15,16,17,18,19,20,21 the thermopower of a normal-metal wire in proximity to a superconducor/normalmetal loop was found to oscillate as a function of the magnetic flux piercing the loop. The amplitude of the oscillations was shown to exceed the thermopower of the normalmetal wire in the absence of proximity-induced superconductivity.…”

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confidence: 83%

Thermopower oscillations in mesoscopic Andreev interferometers

Titov

2008

Phys. Rev. B

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Anomalously large thermopower of mesoscopic normal-metal/superconductor interferometers has been investigated by Chandrasekhar et al. It was shown that, depending on the geometry of the interferometer, the thermopower is either symmetric or antisymmetric periodic function of the magnetic flux. We develop a detailed theory of the observed thermoelectric phenomena in the framework of the non-equilibrium quasiclassical approach. In particular we provide, for the first time, a possible explanation of the symmetric thermopower oscillations. This effect is attributed to the electron-hole symmetry violation that originates in the steady-state charge imbalance between different arms of the interferometer. Our theory can be tested by an additional control over the charge imbalance in a modified setup geometry. We also predict a sign reversal behavior of the thermopower with increasing temperature that is consistent with the experiments by Parsons et al.Comment: 13 pages, 7 figures, final versio

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confidence: 83%

Thermopower oscillations in mesoscopic Andreev interferometers

Titov

2008

Phys. Rev. B

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“…In this paper, we shall be primarily interested in the thermal properties of superconducting proximity effect systems [35][36][37][38][39][40][41][42][43][44][45][46][47][48][49][50]. Indeed, in some sense, the thermal properties of NS systems were the first to be studied [51].…”

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confidence: 99%

Thermal transport in superconductor/normal-metal structures

Chandrasekhar¹

2009

Supercond. Sci. Technol.

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We review experiments over the last ten years on thermal transport in mesoscopic normal metals in contact with a superconductor. The main focus of this effort has been on the exploration of coherent thermal effects in mesoscopic normal-metal/superconductor structures, i.e. effects in which the phase of the quasiparticles participating in thermal transport is important. Coherence in thermal transport manifests itself as oscillations of the thermal conductance and the thermopower of mesoscopic devices with an externally applied magnetic field.

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“…Much attention has been paid to the nanostructure of thermoelectric materials these years [1][2][3][4][5] . On one hand, they give the possibility of enhancing the figure of merit (ZT) due to the influence of quantum dimension effect.…”

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confidence: 99%

Deposition of antimony telluride thin film by ECALE

et al. 2006

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The process of Sb 2 Te 3 thin film growth on the Pt substrate by electrochemical atomic layer epitaxy (ECALE) was studied. Cyclic voltammetric scanning was performed to analyze the electrochemical behavior of Te and Sb on the Pt substrate. Sb 2 Te 3 film was formed using an automated flow deposition system by alternately depositing Te and Sb atomic layers for 400 circles. The deposited Sb 2 Te 3 films were characterized by XRD, EDX, FTIR and FESEM observation. Sb 2 Te 3 compound structure was confirmed by XRD pattern and agreed well with the results of EDX quantitative analysis and coulometric analysis. FESEM micrographs showed that the deposit was composed of fine nano particles with size of about 20 nm. FESEM image of the cross section showed that the deposited films were very smooth and dense with thickness of about 190 nm. The optical band gap of the deposited Sb 2 Te 3 film was determined as 0.42 eV by FTIR spectroscopy, and it was blue shifted in comparison with that of the bulk Sb 2 Te 3 single crystal due to its nanocrystalline microstructure.

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Thermoelectric effects in normal metal/superconductor interface structures

Cited by 8 publications

References 21 publications

Thermopower oscillations in mesoscopic Andreev interferometers

Thermopower oscillations in mesoscopic Andreev interferometers

Thermal transport in superconductor/normal-metal structures

Deposition of antimony telluride thin film by ECALE

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