Spin and Current Variations in Josephson Junctions
Mesoscale and Nanoscale Physics
2007-05-23 v1 Superconductivity
Abstract
We study the dynamics of a single spin embedded in the tunneling barrier between two superconductors. As a consequence of pair correlations in the superconducting state, the spin displays rich and unusual dynamics. To properly describe the time evolution of the spin we derive the effective Keldysh action for the spin. The superconducting correlations lead to an effective spin action, which is non-local in time, leading to unconventional precession. We further illustrate how the current is modulated by this novel spin dynamics.
Keywords
Cite
@article{arxiv.cond-mat/0402548,
title = {Spin and Current Variations in Josephson Junctions},
author = {A. Shnirman and Z. Nussinov and Jian-Xin Zhu and A. V. Balatsky and Yu. Makhlin},
journal= {arXiv preprint arXiv:cond-mat/0402548},
year = {2007}
}