Point-contact spectroscopy of the high-temperature superconductor BiSrCaCuO
Abstract
The maximum value of the energy gap 8\ meV and the ratio 2δ/kTc~2.5 are determined for a high-temperature superconductor Bi2Sr2CaCu2O8+y by using point contacts. It was found that the high-temperature superconductor is transformed under the effect of current injection of quasiparticles to a new modified state with a reduced gap, which is stable in a wide range of injection intensity.
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