The Berezinskii-Kosterlitz-Thouless phase transition in the Josephson medium of a two-level granular high-temperature superconductor YBa2Cu3O7-δ

2018 ◽  
Vol 44 (3) ◽  
pp. 194-198 ◽  
Author(s):  
T. V. Sukhareva ◽  
V. A. Finkel
Keyword(s):  
Phase Transition ◽  
High Temperature ◽  
High Temperature Superconductor ◽  
Josephson Medium

The wavevector substar group in reciprocal space and its representation

2017 ◽  
Vol 73 (5) ◽  
pp. 403-413
Author(s):  
Il Hwan Kim ◽  
Jong Ok Pak ◽  
Il Hun Kim ◽  
Song Won Kim ◽  
Lin Li
Keyword(s):  
Phase Transition ◽  
High Temperature ◽  
Solid State ◽  
Symmetry Breaking ◽  
High Temperature Superconductor ◽  
Landau Theory ◽  
Translational Symmetry ◽  
Mathematical Tool ◽  
Symmetry Breaking Phenomena ◽  
Powerful Mathematical Tool

A new concept of the wavevector substar group is established which, in the study of translational symmetry breaking of a crystal, only considers the particular arms of the wavevector star taking part in the phase transition; this is in contrast with the traditional Landau theory which considers all of the arms of the wavevector star. It is shown that this new concept can be used effectively to investigate the interesting physical properties of crystals associated with translational symmetry breaking. It is shown that studies on complicated phase transitions related to reducible representations, such as those in perovskite KMnF3multiferroics and the high-temperature superconductor La2/3Mg1/2W1/2O3(La4Mg3W3O18), are much simplified by the new concept. The theory of the wavevector substar group and its representation is a powerful mathematical tool for the study of various symmetry-breaking phenomena in solid-state crystals.

Mechanisms of dissipation in a Josephson medium based on a high-temperature superconductor in a magnetic field

2006 ◽  
Vol 48 (5) ◽  
pp. 826-832 ◽  
Author(s):  
D. A. Balaev ◽  
S. I. Popkov ◽  
K. A. Shaĭkhutdinov ◽  
M. I. Petrov
Keyword(s):  
Magnetic Field ◽  
High Temperature ◽  
High Temperature Superconductor ◽  
Josephson Medium

Orthorhombic‐tetragonal phase transition in high‐temperature superconductor YBa2Cu3O7

1987 ◽  
Vol 51 (5) ◽  
pp. 367-368 ◽  
Author(s):  
M. O. Eatough ◽  
D. S. Ginley ◽  
B. Morosin ◽  
E. L. Venturini
Keyword(s):  
Phase Transition ◽  
High Temperature ◽  
Tetragonal Phase ◽  
High Temperature Superconductor ◽  
Tetragonal Phase Transition
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