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Macroscopic Quantum Tunneling and Quasiparticle Dissipation in d-wave Superconductor Josephson Junctions

Shiro Kawabata·Satoshi Kashiwaya·Yasuhiro Asano·Yukio Tanaka
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Abstract

We examine the macroscopic quantum tunneling (MQT) in high-Tc superconductor Josephson junctions with a d-wave order parameter. Using microscopic Hamiltonian and the functional integral method, we analytically obtain the MQT rate (the inverse lifetime of the metastable state) for the c-axis twist Josephson junctions. In the case of the zero twist angle, the system shows the super-Ohmic dissipation due to the presence of the nodal quasiparticle tunneling. Therefore, the MQT rate is strongly suppressed in compared with the finite twist angle cases.

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Shiro Kawabata, Satoshi Kashiwaya, Yasuhiro Asano, Yukio Tanaka. 2004-09-27. Macroscopic Quantum Tunneling and Quasiparticle Dissipation in d-wave Superconductor Josephson Junctions. https://doi.org/10.1103/physrevb.70.132505

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