Search for Magnetic Field Induced Gap in a High-Tc Superconductor

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Break junctions made of the optimally doped high temperature superconductor Bi2Sr2Ca2CuO8 with Tc of 90 K has been investigated in magnetic fields up to 12 T, at temperatures from 4.2 K to Tc. The junction resistance varied between 1kOhm and 300kOhm. The differential conductance at low biases did not exhibit a significant magnetic field dependence, indicating that a magnetic-field-induced gap (Krishana et al., Science 277 83 (1997)), if exists, must be smaller than 0.25 meV.
3 pages, 2 figures

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Superconductivity

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http://salesiana.dossiersoluciones.com/handle/123456789/16078

Consulte el texto completo en el siguiente enlace:

https://arxiv.org/abs/cond-mat/0002376
 http://arxiv.org/abs/cond-mat/0002376
 Solid State Communications 116, 197 (2000)
 doi:10.1016/S0038-1098(00)00306-9

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arXiv