Nonequilibrium microwave emission due to tunnel injection of quasiparticles into a high-Tc Bi2Sr2CaCu2Oy superconductor

I. Iguchi; K. Lee; E. Kume; T. Ishibashi; K. Sato

doi:10.1103/PhysRevB.61.689

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Nonequilibrium microwave emission due to tunnel injection of quasiparticles into a high-Tc Bi2Sr2CaCu2Oy superconductor

I. Iguchi, K. Lee, E. Kume, T. Ishibashi, K. Sato

DOI 10.1103/PhysRevB.61.689 · Physical Review B

T1

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Abstract

Nonequilibrium microwave emission due to tunnel injection of quasiparticles into a high-TcBi2Sr2CaCu2Oy (Bi2212) superconducting thin film using an Au/I/Bi2212 tunnel junction is reported. The microwaves were detected by a superheterodyne-mixer technique at a receiver frequency of 47 GHz. With increasing the injection current, the emitted microwave intensity increased almost linearly at relatively low temperatures, in qualitative agreement with the case of YBa2Cu3O7−y films. Above 35 K, however, the intensity vs injection current curves exhibited nonlinear behavior. The results were consistently interpreted by the Josephson plasma excitation model due to quasiparticle injection recently proposed by Shafranjuk and Tachiki.

Source-reported materials — not catalogue approval

Formula	Reported Tc (K)	Pressure (GPa)	Type
Bi2Sr2CaCu2Oy Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	75	Pressure not reported	unknown
YBa2Cu3O7-y Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown