Vortices and Quantum Tunneling in Current-Biased 0-π-0 Josephson Junctions of d-Wave Superconductors

Takeo Kato*, Masatoshi Imada

*この研究の対応する著者

研究成果: Article査読

34 被引用数 (Scopus)

抄録

We study a current-biased 0-π-0 Josephson junction made by high-Tc superconductors, theoretically. When a length of the π junction is large enough, this junction contains a vortex-antivortex pair of both ends of the π junction. Magnetic flux carried by the vortices is calculated using the sine-Gordon equation. The result shows that the magnetic flux of the vortices is suppresed to zero as the distance between the vortices is reduced. By applying an external current, the orientation of the vortices is reversed, and a voltage pulse is generated. The current needed for this transition and generated pulse energy are calculated. Macroscopic quantum tunneling (MQT) in this transition is also studied. The tunneling rate has been evaluated by an effective Hamiltonian with one degree of freedom.

本文言語English
ページ(範囲)1445-1449
ページ数5
ジャーナルjournal of the physical society of japan
66
5
DOI
出版ステータスPublished - 1997 5
外部発表はい

ASJC Scopus subject areas

  • 物理学および天文学(全般)

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