Fine Effects in the Temperature Dependence of the Thermal Conductivity of Y-123 Cuprates in a “Weak” Pseudogap State

Quasiregular anomalies of the thermal conductivity k of the YBa 2 Cu 3 O 7 − x hole high-temperature superconductor in a pseudogap state, as well as a “giant” anomaly near T C , have been detected for the first time. The temperature anomalies of the carrier density ( n h ) in YBa 2 Cu 3 O 7 − x have...

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Bibliographic Details
Published in:JETP letters 2019-04, Vol.109 (8), p.525-528
Main Authors: Sokolenko, V. I., Frolov, V. A.
Format: Article
Language:English
Subjects:
Anomalies
Atomic
Biological and Medical Physics
Biophysics
Bosons
Carrier density
Condensed Matter
Cuprates
Current carriers
Fermi surfaces
Heat conductivity
Heat transfer
High temperature superconductors
Molecular
Optical and Plasma Physics
Particle and Nuclear Physics
Physics
Physics and Astronomy
Quantum Information Technology
Solid State Physics
Spintronics
Temperature dependence
Thermal conductivity
YBCO superconductors
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Summary:Quasiregular anomalies of the thermal conductivity k of the YBa 2 Cu 3 O 7 − x hole high-temperature superconductor in a pseudogap state, as well as a “giant” anomaly near T C , have been detected for the first time. The temperature anomalies of the carrier density ( n h ) in YBa 2 Cu 3 O 7 − x have been revealed and their correlation with k anomalies has been established. It has been shown that n h ( k ) anomalies of the pseudogap state are due to the step-by-step pairing of charge carriers into positively charged bosons. The correlation of n h ( k ) anomalies near T C with the topological conversion of a part of the Fermi surface, on one hand, and with the structure anomaly, on the other hand, has been established.
ISSN:0021-3640
1090-6487
DOI:10.1134/S0021364019080113