Theoretical analysis of electronic thermal properties of the interfaces between multiband superconductors and a normal metal

I. A Devyatov; M. Yu. Romashka; A. V. Semenov; P. A. Krutitskii; M. Yu. Kupriyanov

doi:10.1117/12.854521

26 February 2010 Theoretical analysis of electronic thermal properties of the interfaces between multiband superconductors and a normal metal

I. A Devyatov, M. Yu. Romashka, A. V. Semenov, P. A. Krutitskii, M. Yu. Kupriyanov

Author Affiliations +

Proceedings Volume 7521, International Conference on Micro- and Nano-Electronics 2009; 75210N (2010) https://doi.org/10.1117/12.854521
Event: International Conference on Micro- and Nano-Electronics 2009, 2009, Zvenigorod, Russian Federation

Abstract

Investigations of the electronic thermal properties of the interfaces between a normal metal and high-temperature superconductors are important for correct design of modern low-temperature electronic refrigerators and bolometers. Multiband superconductivity, recently discovered in ferropnictides and in magnesium diboride, is the suitable choice due to isotropic order parameter in it, in contrast with strongly anisotropic d-wave superconductivity in high-Tc cuprates, which is destructive for electronic refrigeration and bolometric applications. Moreover, recent calculations of Andreev spectra and subgup bound states in ferropnictides, taking into account coherent multiband interference effects in s± signreversal order parameter model, predict possible suppression of Andreev reflection for clean boundaries between ferropnictides and a normal metal. This Andreev reflection suppression can improve electronic refrigerator quality. Up to now there was no calculation of electronic thermal properties of the interfaces between a normal metal and novel multiband superconductors. In this paper we calculate the thermal flux and electronic thermal conductivity of the boundary between normal metal and novel multiband superconductors. In this calculations both s₊₊ and s_± sign-reversal order parameter models for multiband superconductor is used, taking into account coherent multiband interference effect.

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I. A Devyatov, M. Yu. Romashka, A. V. Semenov, P. A. Krutitskii, and M. Yu. Kupriyanov "Theoretical analysis of electronic thermal properties of the interfaces between multiband superconductors and a normal metal", Proc. SPIE 7521, International Conference on Micro- and Nano-Electronics 2009, 75210N (26 February 2010); https://doi.org/10.1117/12.854521

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KEYWORDS

Superconductors

Metals

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Superconductivity

Interfaces

Quasiparticles

Bolometers

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