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Macroscopic Quantum Tunneling and Quasiparticle Dissipation in d-wave Superconductor Josephson Junctions | | Shiro Kawabata
; Satoshi Kashiwaya
; Yasuhiro Asano
; Yukio Tanaka
; | | Date: |
27 May 2004 | | Journal: | Phys. Rev. B 70 (2004) 132505 | | Subject: | Superconductivity; Mesoscopic Systems and Quantum Hall Effect | cond-mat.supr-con cond-mat.mes-hall quant-ph | | 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. | | Source: | arXiv, cond-mat/0405628 | | Services: | Forum | Review | PDF | Favorites | |
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