Competing pseudogap and impurity effects on the normal-state specific heat properties of cuprate superconductors

2014 ◽  
Vol 406 ◽  
pp. 176-184 ◽  
Author(s):  
S. Dzhumanov ◽  
E.X. Karimboev
Keyword(s):  
Specific Heat ◽  
Normal State ◽  
Cuprate Superconductors ◽  
Impurity Effects

STABLE hc/e VORTICES IN SUPERCONDUCTORS WITH SPIN-CHARGE SEPARATION

1992 ◽  
Vol 06 (05n06) ◽  
pp. 509-526
Author(s):  
Subir Sachdev
Keyword(s):  
Magnetic Field ◽  
Magnetic Flux ◽  
Normal State ◽  
Phenomenological Model ◽  
Charge Separation ◽  
Cuprate Superconductors ◽  
Superconducting Phase ◽  
Low Energy ◽  
Large N ◽  
Normal State Properties

A phenomenological model, F, of the superconducting phase of systems with spin-charge separation and antiferromagnetically induced pairing is studied. Above Hc1, magnetic flux can always pierce the superconductor in vortices with flux hc/2e, but regimes are found in which vortices with flux hc/e are preferred. Little-Park and other experiments, which examine periodicities with a varying magnetic field, always observe a period of hc/2e. The low energy properties of a symplectic large-N expansion of a model of the cuprate superconductors are argued to be well described by F. This analysis and some normal state properties of the cuprates suggest that hc/e vortices should be stable at the lowest dopings away from the insulating state at which superconductivity first occurs.

Prediction of the properties of cuprate superconductors based upon a two-gap model with magnetic impurity effects included

1996 ◽  
Author(s):  
Robert J. Soulen, Jr. ◽  
Stuart A. Wolf ◽  
S. D. Adrian ◽  
Oleg V. Dolgov ◽  
S. V. Shulga ◽  
...  
Keyword(s):  
Cuprate Superconductors ◽  
Magnetic Impurity ◽  
Gap Model ◽  
Impurity Effects
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