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Resistive investigation of pseudogap state in non-stoichiometric ReBa2Cu3O7-δ (Re = Y, Ho) single crystals with account for BCS-BEC crossover

Vovk, R.V.; Obolenskii, M. A.; Zavgorodniy, A. A.; Goulatis, I. L. ; Chroneos, A. and Biletskiy, E. V. (2009). Resistive investigation of pseudogap state in non-stoichiometric ReBa2Cu3O7-δ (Re = Y, Ho) single crystals with account for BCS-BEC crossover. Journal of Alloys and Compounds, 485(1-2) L21-L23.

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Abstract

We investigate the conductivity in the basis plane of the non-stoichiometric ReBa2Cu3O7-δ (Re = Y, Ho) single crystals. The excess conductivity (Δσ) is described by Δσ~(1-T/T*)exp(Δab*/T) in the wide temperature range Tf < T< T*. where T* is the mean field temperature of the superconducting transition. We determined that the temperature dependence of the pseudogap (PG) is described in terms of the BCS-BEC crossover theoretical model It is observed that a reduction in the oxygen content leads to the widening of the temperature interval. in which the PG region is realized, and to the narrowing of the area of the ρ(T) linear dependence in the ab-plane

Item Type: Journal Item
Copyright Holders: 2009 Elsevier B V.
ISSN: 0925-8388
Keywords: ReBa2Cu3O7−δ (Re = Y, Ho) single crystals; pseudogap; excess conductivity
Academic Unit/School: Faculty of Science, Technology, Engineering and Mathematics (STEM) > Engineering and Innovation
Faculty of Science, Technology, Engineering and Mathematics (STEM)
Item ID: 35192
Depositing User: Alexander Chroneos
Date Deposited: 07 Nov 2012 15:01
Last Modified: 04 Oct 2016 11:22
URI: http://oro.open.ac.uk/id/eprint/35192
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