The electron transport phenomena in Y based HTSC's and their analysis on the basis of phenomenological narrow-band theory the band structure transformation with oxygen content and substitution for Cu
1995; Elsevier BV; Volume: 248; Issue: 3-4 Linguagem: Inglês
10.1016/0921-4534(95)00173-5
ISSN1873-2143
AutoresV. É. Gasumyants, V. I. Kaĭdanov, E. V. Vladimirskaya,
Tópico(s)Superconducting Materials and Applications
ResumoThe transport properties of YBa2Cu3Oy with various y and YBa2Cu3−xMxOy (M = Fe, Co, Mn) with various χ have been studied. The results obtained have been analyzed on the basis of the phenomenological theory of electron transport in the case of a narrow conductive band. The narrow-band model permits one to account for the specific features of the transport coefficients of HTSC and to determine the band-structure parameters from comparison of the experimental and calculated temperature dependences of the thermoelectric power. The dependences of band-structure parameters and superconductive properties on y and χ have been analyzed together. The differences in the influence of different 3d metals on the band structure were revealed. Taking into account the crystallochemical-studies data we drew the conclusion that the oxygen sublattice disordering has a determinant effect on band-structure parameters and superconductive properties of YBa2Cu3Oy.
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