Phase diagram of geometric d-wave superconductor Josephson junctions

Details Phase diagram of geometric d-wave superconductor Josephson junctions Phase diagram of geometric d-wave superconductor Josephson junctions

2008-08-15

arxiv.org/abs/0808.2140v2

Phys. Rev. B 79, 144505 (2009)

Physics

Condensed Matter

Superconductivity

9 pages, 11 figures. Phys. Rev. B, accepted

Scientific paper

10.1103/PhysRevB.79.144505

We show that a constriction-type Josephson junction realized by an epitactic thin film of a d-wave superconductor with an appropriate boundary geometry exhibits intrinsic phase differences between 0 and pi depending on geometric parameters and temperature. Based on microscopic Eilenberger theory, we provide a general derivation of the relation between the change of the free energy of the junction and the current-phase relation. From the change of the free energy, we calculate phase diagrams and discuss transitions driven by geometric parameters and temperature.

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