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Effect of Structural Relaxation on the Metal-Insulator Transition in Heavily Underdoped YBaCuO Single Crystals

被引：0
|
作者：
Vovk, R. V. [1 ]
Dobrovolskiy, O. V. [1 ,2 ]
Nazyrov, Z. F. [1 ]
Kotvitskaya, K. A. [1 ]
Chroneos, A. [3 ]
机构：
[1] V Karazin Natl Univ, UA-61077 Kharkov, Ukraine
[2] Goethe Univ Frankfurt, D-60438 Frankfurt, Germany
[3] Coventry Univ, Fac Engn & Comp, Coventry, W Midlands, England
来源：
JOURNAL OF LOW TEMPERATURE PHYSICS | 2015年 / 180卷 / 3-4期
关键词：
Superconducting cuprates; Metal-insulator transition; Annealing; OXYGEN-DEFICIENT YBA2CU3O7-DELTA; FLUCTUATION CONDUCTIVITY; HIGH-PRESSURE; ROOM-TEMPERATURE; TWIN BOUNDARIES; PSEUDO-GAP; TRANSPORT; PARACONDUCTIVITY; RANGE;
D O I：
10.1007/s10909-015-1304-z
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
We report the results of a study of the effect of structural relaxation on the basal-plane conductivity of heavily underdoped high- YBaCuO single crystals. An increase of the oxygen deficiency in YBaCuO has been found to strengthen localization effects and to lead to the realization of a transition of the metal-insulator type, which always precedes the superconducting transition. In addition, a 5-day room-temperature annealing of the samples has been revealed to result in a notable shift of the metal-insulator transition point toward higher temperatures.
引用
收藏
页码：277 / 283
页数：7
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