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arXiv · 0802.4203

Possible observation of energy level quantization in an intrinsic Josephson junction

H. Kashiwaya·T. Matsumoto·S. Kashiwaya·H. Shibata·H. Eisaki·Y. Yoshida·S. Kawabata·Y. Tanaka
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Abstract

Energy level quantization (ELQ) is studied to clarify the macroscopic quantum dynamics of the d-wave Josephson junction (JJ). The influences of the nodal quasiparticles of d-wave superconductivity on the damping effect are numerically evaluated on the basis of a phenomenological model. The calculation, based on realistic parameters for a Bi2Sr2CaCu2O8+d (Bi2212) intrinsic JJ, shows that the observation of ELQ is possible when the sweep rate of the bias current exceeds 10 A/sec. High-sweep- rate measurements (121A/sec) performed on a Bi2212 intrinsic JJ result in the appearance of multiple peaks in the switching current distribution suggesting the realization of ELQ in the d-wave JJ.

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H. Kashiwaya, T. Matsumoto, S. Kashiwaya, H. Shibata, H. Eisaki, Y. Yoshida, S. Kawabata, Y. Tanaka. 2008-02-28. Possible observation of energy level quantization in an intrinsic Josephson junction. https://doi.org/10.1016/j.physc.2008.05.251

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