Fluctuation conductivity of oxygen underdoped YBa₂Cu₃O_{7鈭?span style='font-style: italic'>未} single crystals

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• 作者：R.V. Vovk ; G.Ya. Khadzhai ; I.L. Goulatis ; A. Chroneos
• 关键词：Fluctuation conductivity ; Oxygen stoichiometry ; High temperature superconductor
• 刊名：Physica B
• 出版年：1 March, 2014
• 年：2014
• 卷：436
• 期：Complete
• 页码：88-90
• 全文大小：366 K

文摘

The electrical resistance in the range of 孝_C-300 K in the layer planes of Y袙邪₂小u₃袨_7鈭?em>未 single crystals with a range of oxygen deficiency (providing a range of T_C from 78 to 92 K) 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 400 K, coherence length 尉_小(0)鈮?.5 脜.