Macroscopic quantum tunneling in BiPb2201

27th International Conference on Low Temperature Physics

Nomura, Y.^1 ; Kambara, H.^1 ; Nakagawa, Y.^1 ; Kakeya, I.^1

Department of Electronic Science and Engineering, Kyoto University, Japan^1

关键词: Crossover temperature;    Effective temperature;    High temperature;    Intrinsic Josephson junction;    Macroscopic quantum tunneling;    Switching probability;    Temperature independents;    Thermal activation;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/568/2/022033/pdf
DOI  :  10.1088/1742-6596/568/2/022033

来源: IOP

【 摘 要 】

We measured The switching probability distributions of The first and second switches in Bi2-xPbxSr2-yLauCuO6+δ(BiPb2201) intrinsic Josephson junctions. The effective temperature of The first switch is temperature independent below 0.6 K, which is slightly higher than The crossover temperature estimated from The thermal activation model. On The other hand, The effective temperature of The second switch is temperature independent below 2.0 K, which is one-order higher than The crossover temperature. Our study shows that The temperature independent state at high temperature is measured not only in Bi2Sr2CaCu2O8+δbut also in Bi2Sr2CuO6+δ.