Visualization of a Berezinskii–Kosterlitz–Thouless Topological Phase Transition in a Josephson Medium: Detection of an Anomalous Temperature Dependence of the Magnetoresistance of YBa2Cu3O7–δ Granular High-Temperature Superconductors

JETP Letters ◽  
2018 ◽  
Vol 108 (4) ◽  
pp. 243-246 ◽  
Author(s):  
T. V. Sukhareva ◽  
V. A. Finkel
Keyword(s):  
Phase Transition ◽  
High Temperature ◽  
Temperature Dependence ◽  
High Temperature Superconductors ◽  
Topological Phase ◽  
Anomalous Temperature Dependence ◽  
Anomalous Temperature ◽  
Topological Phase Transition ◽  
Josephson Medium

POSSIBLE ANOMALOUS TEMPERATURE DEPENDENCES OF LONDON PENETRATION DEPTH IN THALLIUM AND BISMUTH HIGH-TEMPERATURE SUPERCONDUCTORS

1990 ◽  
Vol 04 (08) ◽  
pp. 525-529 ◽  
Author(s):  
A. I. BUZDIN ◽  
D. A. KUPTSOV ◽  
B. U. VUYICHIT'
Keyword(s):  
High Temperature ◽  
Temperature Dependence ◽  
Penetration Depth ◽  
High Temperature Superconductors ◽  
Anomalous Temperature Dependence ◽  
London Penetration Depth ◽  
Anomalous Temperature ◽  
Temperature Dependences

Anomalous temperature dependence of London penetration depth is predicted in high-T c superconductors containing several inequivalent Cu-O layers.

scholarly journals The influence of topological phase transition on the superfluid density of overdoped copper oxides

2017 ◽  
Vol 19 (33) ◽  
pp. 21964-21969 ◽  
Author(s):  
V. R. Shaginyan ◽  
V. A. Stephanovich ◽  
A. Z. Msezane ◽  
G. S. Japaridze ◽  
K. G. Popov
Keyword(s):  
Phase Transition ◽  
High Temperature Superconductors ◽  
Superfluid Density ◽  
Copper Oxides ◽  
Surface Topology ◽  
Topological Phase ◽  
Primary Reason ◽  
Flat Bands ◽  
Topological Phase Transition ◽  
Fermi Surface Topology

We show that a quantum phase transition, generating flat bands and altering Fermi surface topology, is a primary reason for the exotic behavior of the overdoped high-temperature superconductors represented by La2−xSrxCuO4, whose superconductivity features differ from what is predicted by the classical Bardeen–Cooper–Schrieffer theory.

scholarly journals Магнитокалорический эффект и магнитострикция в сплаве Гейслера Ni-=SUB=-49.3-=/SUB=-Mn-=SUB=-40.4-=/SUB=-In-=SUB=-10.3-=/SUB=- в переменных магнитных полях

2018 ◽  
Vol 60 (6) ◽  
pp. 1099
Author(s):  
Л.Н. Ханов ◽  
А.Б. Батдалов ◽  
А.В. Маширов ◽  
А.П. Каманцев ◽  
А.М. Алиев
Keyword(s):  
Phase Transition ◽  
Magnetic Fields ◽  
Temperature Dependence ◽  
Magnetocaloric Effect ◽  
Heusler Alloy ◽  
Austenite Phase ◽  
Anomalous Temperature Dependence ◽  
Anomalous Temperature ◽  
Magnetic Subsystem

AbstractThe magnetocaloric effect (MCE) and the magnetostriction in the Ni_49.3Mn_40.4In_10.3 Heusler alloy have been measured in ac magnetic fields to 8 T. It is shown that the contributions of the magnetic and structural subsystems to MCE have opposite signs; in this case, the contribution of the magnetic subsystem is dominant. The anomalous temperature dependence of the magnetostriction during the magnetostructural phase transition (PT) is explained by competition of the processes of growing austenite phase nuclei and the striction processes in them.

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