Evolution of the pseudogap and excess conductivity of YBa2Cu3O7-δ single crystals in the course of long-term aging

被引：0
|
作者：
Solovjov, A. L. [1 ,2 ,3 ]
Bludova, L. V. [1 ]
Shytov, M. V. [1 ]
Kamchatnaya, S. N. [2 ,4 ]
Nazyrov, Z. F. [2 ,5 ]
Vovk, R. V. [2 ,4 ]
机构：
[1] Natl Acad Sci Ukraine, B Verkin Inst Low Temp Phys & Engn, UA-61103 Kharkiv, Ukraine
[2] Kharkov Natl Univ, UA-61022 Kharkiv, Ukraine
[3] Polish Acad Sci, Inst Low Temp & Struct Res, PL-50422 Wroclaw, Poland
[4] Ukrainian State Univ Railway Transport, UA-61050 Kharkiv, Ukraine
[5] Int European Univ, UA-03187 Kiev, Ukraine
来源：
LOW TEMPERATURE PHYSICS | 2023年 / 49卷 / 04期
关键词：
high-T-c superconductors; fluctuation conductivity; pseudogap; defect; long-term aging; HIGH-TEMPERATURE SUPERCONDUCTORS; PREFORMED COOPER PAIRS; FLUCTUATION CONDUCTIVITY; DENSITY-WAVE; TRANSITION-TEMPERATURE; PHASE FLUCTUATIONS; ORDER PARAMETERS; ENERGY-GAP; FILMS; STATE;
D O I：
10.1063/10.0017593
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
The temperature dependences of both fluctuation conductivity (FLC) sigma'(T) and pseudogap (PG).triangle*(T) derived from measurements of resistivity Rho(T) of an optimally doped YBa2Cu3O7- (delta) single crystal subjected to long-term storage have been studied. The as-grown sample S1 exhibits characteristics typical of optimally doped YBa2Cu3O7- d single crystals containing twins and twin boundaries. Analysis of both FLC and PG showed an unexpected improvement in all characteristics of the sample after 6 years of storage (sample S2), indicating that the effect of twin boundaries is somehow limited. After 17 years of storage, all characteristics of the sample changed dramatically, which indicates a strong influence of internal defects formed during the aging process. For the first time, the temperature dependences of both FLC and PG were obtained after 17 years of storage.
引用
收藏
页码：477 / 485
页数：9
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