Theory of the Diamagnetism Above the Critical Temperature for Cuprates

Details Theory of the Diamagnetism Above the Critical Temperature for Cuprates Theory of the Diamagnetism Above the Critical Temperature for Cuprates

2003-05-07

arxiv.org/abs/cond-mat/0305135v2

Phys. Rev. B69, 134510 (2004)

Physics

Condensed Matter

Superconductivity

published version

Scientific paper

10.1103/PhysRevB.69.134510

Recently experiments on high critical temperature superconductors has shown that the doping levels and the superconducting gap are usually not uniform properties but strongly dependent on their positions inside a given sample. Local superconducting regions develop at the pseudogap temperature ($T^*$) and upon cooling, grow continuously. As one of the consequences a large diamagnetic signal above the critical temperature ($T_c$) has been measured by different groups. Here we apply a critical-state model for the magnetic response to the local superconducting domains between $T^*$ and $T_c$ and show that the resulting diamagnetic signal is in agreement with the experimental results.

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