1. Fluctuation conductivity of oxygen underdoped YBa2Cu3O7−δ single crystals.
- Author
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Vovk, R.V., Khadzhai, G.Ya., Goulatis, I.L., and Chroneos, A.
- Subjects
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YTTRIUM compounds , *FLUCTUATIONS (Physics) , *SINGLE crystals , *ELECTRIC resistance , *ELECTRIC conductivity , *DEBYE temperatures - Abstract
Abstract: The electrical resistance in the range of Т C–300K in the layer planes of YВа2Сu3О7−δ single crystals with a range of oxygen deficiency (providing a range of T C from 78 to 92K) was investigated. The experimental data is approximated by an expression that accounts for the scattering of electrons on phonons, as well as on defects and the fluctuation conductivity in a 3-D model of the Aslamazov-Larkin theory. According to this approximation, depending upon the oxygen deficiency, the Debye temperature varies from 245 to 400K, coherence length ξ С(0)≈0.5Å. [Copyright &y& Elsevier]
- Published
- 2014
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