Temperature dependence of upper critical fields and coherence lengths for optimally-doped YBa2Cu3O7-δ thin films

被引：4
|
作者：
Petrenko, E. V. [1 ]
Omelchenko, L. V. [1 ]
Terekhov, A. V. [1 ]
Kolesnichenko, Yu. A. [1 ]
Rogacki, K. [2 ]
Sergeyev, D. M. [3 ]
Solovjov, A. L. [1 ,2 ,4 ]
机构：
[1] Natl Acad Sci Ukraine Kharkiv, B Verkin Inst Low Temp Phys & Engn, UA-61103 Kharkiv, Ukraine
[2] Polish Acad Sci, Inst Low Temp & Struct Res, PL-50950 Wroclaw, Poland
[3] K Zhubanov Aktobe Reg State Univ, Aktobe 030000, Kazakhstan
[4] Kharkov Natl Univ, Fac Phys, Kharkiv, Ukraine
来源：
LOW TEMPERATURE PHYSICS | 2022年 / 48卷 / 10期
关键词：
high-temperature superconductors; YBCO films; upper critical field; magnetic field; coherence length; FLUCTUATION CONDUCTIVITY; TRANSITION-TEMPERATURE; PSEUDOGAP STATE; T-C; SUPERCONDUCTORS; PHASE; BCS;
D O I：
10.1063/10.0014015
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
We report the comprehensive comparative analysis of the upper critical magnetic fields mu H-c(2)(0) obtained within Ginzburg-Landau (GL) and Werthamer-Helfand-Hohenberg (WHH) theories for optimally-doped YBa2Cu3O7-delta thin films. For different orientations of the magnetic field, our calculations give 638 and 153 T for mu H-c(2)(0), H || ab and mu H-c(2)(0), H || c, respectively, when using H-c(2)(0). For the first time, the temperature dependences of coherence lengths xi(ab)(T) and xi(c)(T) within proposed theories were determined using 50 and 90% criteria of the normal state resistivity value rho(N). The GL (0.9 rho(N)) approach gives xi(ab)(0) = 11.8 & ANGS; and xi(c)(0) = 3.0 & ANGS; which are in a good agreement with literature data. The implications of very short coherence lengths in HTSCs are discussed.
引用
收藏
页码：755 / 762
页数：8
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