Point-contact spectroscopy of the high-temperature superconductor BiSrCaCuO
L. F. Rybal’chenkoPhysicotechnical Institute of Low Temperatures ,V. V. FisunPhysicotechnical Institute of Low Temperatures ,Nikolai L. BobrovAcademy of Sciences of the Ukrainian SSR , Kharkov ,Miron B. KosmynaA. I. MoshkovAcademy of Sciences of the Ukrainian SSR , Kharkov ,V. P. SeminozhenkoPhysicotechnical Institute of Low Temperatures ,I. K. YansonPhysicotechnical Institute
2017en
ABI
Annotatsiya
The maximum value of the energy gap $Δ\simeq 8\ meV$ and the ratio $2δ/kT_c\simeq~2.5$ are determined for a high-temperature superconductor $\rm Bi_2Sr_2CaCu_2O_{8+y}$ 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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