Theory of Macroscopic Quantum Tunneling and Dissipation in High-Tc Josephson Junctions

Shiro Kawabata , Satoshi Kashiwaya , Yasuhiro Asano , Yukio Tanaka , Takeo Kato , Alexander A. Golubov

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classification ❄️ cond-mat.supr-con cond-mat.mes-hallquant-ph

keywords junctionsdissipationhigh-tcjosephsonmacroscopicquantumsuperconductortunneling

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We have investigated macroscopic quantum tunneling (MQT) in in-plane high-Tc superconductor Josephson junctions and the influence of the nodal-quasiparticle and the zero energy bound states (ZES) on MQT. We have shown that the presence of the ZES at the interface between the insulator and the superconductor leads to strong Ohmic quasiparticle dissipation. Therefore, the MQT rate is noticeably suppressed in comparison with the c-axis junctions in which ZES are completely absent.

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Theory of Macroscopic Quantum Tunneling and Dissipation in High-Tc Josephson Junctions

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