The theoretical analysis of electronic thermal properties of the interfaces between multiband superconductors and a normal metalстатья

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1. Proc_of_SPIE_Vol_7521_R.pdf Proc_of_SPIE_Vol_7521_R.pdf 339,2 КБ 4 марта 2016 [mkupr]

[1] The theoretical analysis of electronic thermal properties of the interfaces between multiband superconductors and a normal metal / I. A. Devyatov, M. Y. Romashka, A. V. Semenov et al. // INTERNATIONAL CONFERENCE ON MICRO- AND NANOELECTRONICS 2009. — Vol. 7521 of Proceedings of SPIE. — SPIE-INT SOC OPTICAL ENGINEERING 1000 20TH ST, PO BOX 10, BELLINGHAM, WA 98227-0010 USA, 2010. — P. 75210N–1–75210N–11. 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-T-c 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(+/-) sign-reversal 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. [ DOI ]

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