Phase dynamics in a d-dot embedded in a s-wave superconductor

T. Koyama; M. Machida; M. Kato; T. Ishida

doi:10.1016/j.physc.2003.12.046

Phase dynamics in a d-dot embedded in a s-wave superconductor

T. Koyama, M. Machida, M. Kato, T. Ishida

Institute for Materials Research (IMR)

Research output: Contribution to journal › Article › peer-review

5 Citations (Scopus)

Abstract

The AC Josephson effect in the interface between a superconducting dot with d_x2-y2 symmetry (d-dot) and its surrounding s-wave superconductor is investigated in the presence of an external magnetic field parallel to the interface. We derive the dynamical equations for the phase difference in this d-dot system for two different shapes of d-dot, i.e., square and triangle. The effect of the d-wave symmetry is incorporated in terms of the orientation-dependent Josephson critical current density. We solve numerically the dynamical equations and clarify the dynamics of vortices with half-flux quantum.

Original language	English
Pages (from-to)	358-361
Number of pages	4
Journal	Physica C: Superconductivity and its applications
Volume	412-414
Issue number	SPEC. ISS.
DOIs	https://doi.org/10.1016/j.physc.2003.12.046
Publication status	Published - 2004 Oct 1

Keywords

AC Josephson effect
I-V characteristics
d-dot
pi-junction

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics
Energy Engineering and Power Technology
Electrical and Electronic Engineering

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AU - Koyama, T.

AU - Machida, M.

AU - Kato, M.

AU - Ishida, T.

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AB - The AC Josephson effect in the interface between a superconducting dot with dx2-y2 symmetry (d-dot) and its surrounding s-wave superconductor is investigated in the presence of an external magnetic field parallel to the interface. We derive the dynamical equations for the phase difference in this d-dot system for two different shapes of d-dot, i.e., square and triangle. The effect of the d-wave symmetry is incorporated in terms of the orientation-dependent Josephson critical current density. We solve numerically the dynamical equations and clarify the dynamics of vortices with half-flux quantum.

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KW - I-V characteristics

KW - d-dot

KW - pi-junction

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