Point-contact spectroscopy of the high-temperature superconductor BiSrCaCuO
L. F. Rybal’chenkoPhysicotechnical Institute of Low Temperatures, Academy of Sciences of the Ukrainian SSR, Kharkov and Scientific Industrial Complex “Monokristallreaktiv,” KharkovV. V. FisunPhysicotechnical Institute of Low Temperatures, Academy of Sciences of the Ukrainian SSR, Kharkov and Scientific Industrial Complex “Monokristallreaktiv,” KharkovN. L. BobrovPhysicotechnical Institute of Low Temperatures, Academy of Sciences of the Ukrainian SSR, Kharkov and Scientific Industrial Complex “Monokristallreaktiv,” KharkovМ. Б. КосмынаPhysicotechnical Institute of Low Temperatures, Academy of Sciences of the Ukrainian SSR, Kharkov and Scientific Industrial Complex “Monokristallreaktiv,” KharkovA. I. MoshkovPhysicotechnical Institute of Low Temperatures, Academy of Sciences of the Ukrainian SSR, Kharkov and Scientific Industrial Complex “Monokristallreaktiv,” KharkovV. P. SeminozhenkoPhysicotechnical Institute of Low Temperatures, Academy of Sciences of the Ukrainian SSR, Kharkov and Scientific Industrial Complex “Monokristallreaktiv,” KharkovI. K. YansonPhysicotechnical Institute of Low Temperatures, Academy of Sciences of the Ukrainian SSR, Kharkov and Scientific Industrial Complex “Monokristallreaktiv,” Kharkov
ABI
Аннотация
The maximum value of the energy gap Δ ≃ 8 meV and the ratio 2 δ/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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