Theory of macroscopic quantum tunnelling and dissipation in high-Tc Josephson junctions

Shiro Kawabata; Satoshi Kashiwaya; Yasuhiro Asano; Yukio Tanaka; Takeo Kato; Alexandre A. Golubov

doi:10.1088/0953-2048/20/2/S02

Theory of macroscopic quantum tunnelling and dissipation in high-Tc Josephson junctions

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

Faculty of Science and Technology

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Abstract

We have investigated macroscopic quantum tunnelling (MQT) in in-plane high-Tc superconductor Josephson junctions and the influence of the nodal-quasiparticle and zero energy bound states (ZES) on MQT. We have shown that the presence of 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 c-axis junctions in which ZES are completely absent.

Original language	English
Pages (from-to)	S6-
Journal	Superconductor science and technology
Volume	20
Issue number	2
DOIs	https://doi.org/10.1088/0953-2048/20/2/S02
Publication status	Published - 2007

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abstract = "We have investigated macroscopic quantum tunnelling (MQT) in in-plane high-Tc superconductor Josephson junctions and the influence of the nodal-quasiparticle and zero energy bound states (ZES) on MQT. We have shown that the presence of 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 c-axis junctions in which ZES are completely absent.",

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AU - Kawabata, Shiro

AU - Kashiwaya, Satoshi

AU - Asano, Yasuhiro

AU - Tanaka, Yukio

AU - Kato, Takeo

AU - Golubov, Alexandre A.

PY - 2007

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AB - We have investigated macroscopic quantum tunnelling (MQT) in in-plane high-Tc superconductor Josephson junctions and the influence of the nodal-quasiparticle and zero energy bound states (ZES) on MQT. We have shown that the presence of 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 c-axis junctions in which ZES are completely absent.

U2 - 10.1088/0953-2048/20/2/S02

DO - 10.1088/0953-2048/20/2/S02

M3 - Article

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VL - 20

SP - S6-

JO - Superconductor science and technology

JF - Superconductor science and technology

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Theory of macroscopic quantum tunnelling and dissipation in high-Tc Josephson junctions

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