Magnetic field effects on T-c and the pseudogap onset temperature in cuprate superconductors
Journal
International Journal of Modern Physics B
Journal Volume
16
Journal Issue
20-22
Pages
3176-3179
Date Issued
2002
Author(s)
Abstract
We study the sensitivity of T c and the pseudogap onset temperature, T*, to low fields, H, for cuprate superconductors, using a BCS-based approach extended to arbitrary coupling. We find that T* and T c , which are of the same superconducting origin, have very different H dependences. The small coherence length makes T* rather insensitive to the field. However, the presence of the pseudogap at T c makes T c more sensitive to H. Our results for the coherence length ξ fit well with existing experiments. We predict that very near the insulator ξ will rapidly increase.
Type
journal article