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

被引：72

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

页码：132505 / 1

页数：4

共 34 条

[1] QUANTUM DYNAMICS OF TUNNELING BETWEEN SUPERCONDUCTORS [J].