Advances in Superconductivity XI pp 169-172 | Cite as
Magnetic-Field Dependence of the Energy Gap in Bi2Sr2CuO6+δ
Conference paper
Abstract
The electron-tunneling technique has been applied to study the magnetic-field effects of the energy gap in BySr2CuO6+δ. The measurements were carried out using break junction with ceramic samples having the critical temperature T c = 6 K. By applying the field at 2 K, the gap structure disappears at ≈ 2–2.5 T, but in some junctions it survives up to at much higher fields. This difference probably reflects the geometrical effects at the junction. We have evaluated the field dependence of the pair-breaking parameter, which is consistent with that for the bulk type-II BCS superconductor in the vortex state.
Key words
Electron tunneling Energy gap Magnetic field Pair breaking Bi2Sr2CuO6+δPreview
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