Macroscopic quantum tunneling and quasiparticle dissipation in d-wave superconductor Josephson junctions -: art. no. 132505

被引：71
|
作者：
Kawabata, S
Kashiwaya, S
Asano, Y
Tanaka, Y
机构：
[1] Natl Inst Adv Ind Sci & Technol, Nanotechnol Res Inst, Tsukuba, Ibaraki 3058568, Japan
[2] Natl Inst Adv Ind Sci & Technol, Synthet Nanofunct Mat Project, Tsukuba, Ibaraki 3058568, Japan
[3] AIST, Nanoelect Res Inst, Tsukuba, Ibaraki 3058568, Japan
[4] Hokkaido Univ, Dept Appl Phys, Sapporo, Hokkaido 0608628, Japan
[5] Nagoya Univ, Dept Appl Phys, Nagoya, Aichi 4648603, Japan
来源：
PHYSICAL REVIEW B | 2004年 / 70卷 / 13期
关键词：
D O I：
10.1103/PhysRevB.70.132505
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
We examine the macroscopic quantum tunneling (MQT) in high-T-c superconductor Josephson junctions with a d-wave order parameter. Using a 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 comparison with the finite twist angle cases.
引用
收藏
页码：132505 / 1
页数：4
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