Josephson anomalous vortices
Dan Crawford, Stefan Ilić, Pauli Virtanen, Tero T. Heikkilä
DOI 10.1103/nsdg-sn1b · Physical Review B
Active bibliographic source — not scientific approval
Bibliographic access preserves source history; it does not approve extracted materials or validate reported claims. Review warnings on each occurrence separately.
Abstract
We show that vortices with circulating current, related with odd-frequency triplet pairing, appear in Josephson junctions where the barrier is a weak ferromagnet with strong spin-orbit coupling. By symmetry analysis we show that there is an additional term—a rotary invariant—in the superconducting free energy which allows for magnetoelectric effects even when the previously considered Lifshitz invariant vanishes. Using a microscopic model based on a modified Usadel equation incorporating those effects, we show that the size, shape, and position of these vortices can be controlled by manipulating Rashba spin-orbit coupling in the weak link, via gates, and we suggest that these vortices could be detected via scanning magnetometry techniques. We also show that the transverse triplet components of the pairing amplitudes can form a texture.
Similar papers
Anisotropic Josephson Coupling of d Vectors in Triplet Superconductors Arising from Frustrated Spin Textures
similarity 0.90Grayson R. Frazier et al.
Source status unknown — claims are unverified
Vortex motion in two-dimensional arrays of small, underdamped Josephson junctions
similarity 0.89T. S. Tighe et al.
Source status unknown — claims are unverified
Pure odd-frequency superconductivity at the cores of proximity vortices
similarity 0.89Mohammad Alidoust et al.
Source status unknown — claims are unverified
Magnetic Josephson junctions with noncentrosymmetric superconductors
similarity 0.88Yousef Rahnavard et al.
Source status unknown — claims are unverified
Spin Josephson effect with a single superconductor
similarity 0.88P. M. R. Brydon et al.
Source status unknown — claims are unverified
Fractional Josephson Vortices and Braiding of Majorana Zero Modes in Planar Superconductor-Semiconductor Heterostructures
similarity 0.88Ady Stern & Erez Berg
Source status unknown — claims are unverified