Comment on ``Plateaus Observed in the Field profile of Thermal Conductivity in the Superconductor Bi_2Sr_2CaCu_2O_8''

Details Comment on ``Plateaus Observed in the Field profile of Thermal Conductivity in the Superconductor Bi_2Sr_2CaCu_2O_8'' Comment on ``Plateaus Observed in the Field profile of Thermal Conductivity in the Superconductor Bi_2Sr_2CaCu_2O_8''

1997-11-11

arxiv.org/abs/cond-mat/9711093v1

Physics

Condensed Matter

Superconductivity

2 Pages including 1 figure

Scientific paper

We studied the thermal conductivity of a Bi_2Sr_2CaCu_2O_8 single crystal as a function of a magnetic field ramped up and down and then reversed. As recently discovered by Krishana et al., we observed a field-independent thermal conductivity above a threshold field. However, our measurements show that the magnitude of background thermal conductivity depends on the field profile in the sample. This is incompatible with the interpretation put forward by Krishana and co-workers.

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