Novel Spin Dynamics in a Josephson Junction
介观与纳米尺度物理
2009-11-10 v4 超导电性
摘要
We address 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 a rich and unusual dynamics. To properly describe the time evolution of the spin we find the generalized Wess-Zumino-Witten-Novikov term in the effective action for the spin on the Keldysh contour. The superconducting correlations lead to an effective spin action which is non-local in time leading to unconventional precessions. Our predictions might be directly tested for macroscopic spin clusters.
引用
@article{arxiv.cond-mat/0306710,
title = {Novel Spin Dynamics in a Josephson Junction},
author = {Jian-Xin Zhu and Zohar Nussinov and Alexander Shnirman and Alexander V. Balatsky},
journal= {arXiv preprint arXiv:cond-mat/0306710},
year = {2009}
}