## CMT108

##
Vortex Structure and Dyanmics in Layered Superconductors

**Author(s):**
M. Eschrig, D. Rainer and J. A. Sauls

**Publication: **
In Volume, *Vortices in Unconventional Superconductors and Superfluids*,
Eds R. Huebener, N. Schopohl and G. Volovik, Springer Series in Solid State Science,
Vol. 132, pp. 175-203, Springer-Verlag, Dresden (2001); ISBN 3-540-42336-2.
[arXiv]
**Abstract:**

We investigate the equilibrium and nonequilibrium properties of the core region of vortices in layered
superconductors. We discuss the electronic structure of singly and doubly quantized vortices for both
s-wave and d-wave pairing symmetry. We consider the intermediate clean regime, where the vortex-core
bound states are broadened into resonances with a width comparable to or larger than the quantized
energy level spacing, and calculate the response of a vortex core to an *a.c.* electromagnetic
field for vortices that are pinned to a metallic defect. We concentrate on the case where the vortex
motion is nonstationary and can be treated by linear response theory. The response of the order parameter,
impurity self energy, induced fields and currents are obtained by a self-consistent calculation of the
distribution functions and the excitation spectrum. We then obtain the dynamical conductivity, spatially
resolved in the region of the core, for external frequencies in the range,
0.1 Δ < ℏ ω < 3 Δ.
We also calculate the dynamically induced charge distribution in the vicinity of the core. This charge
density is related to the nonequilibrium response of the bound states and collective mode, and
dominates the electromagnetic response of the vortex core.

**Comments:**
Presented at the 2000 Workshop on ``Microscopic Structure and Dynamics of Vortices in Unconventional
Superconductors and Superfluids'', Max Planck Institute for the Physics of Complex Systems,
Dresden, Germany [28 pages with 15 figures].

Eprint:
[PDF]
[arXiv]