Quartett formation at (100)/(110)-interfaces of d-wave superconductors
Strongly Correlated Electrons
2009-11-10 v1 Superconductivity
Abstract
Across a faceted (100)/(110) interface between two d-wave-superconductors the structure of the superconducting order parameter leads to an alternating sign of the local Josephson coupling. Describing the Cooper pair motion along and across the interface by a one-dimensional boson lattice model, we show that a small attractive interaction between the bosons boosts boson binding at the interface -- a phenomenon, which is intimately tied to the staggered sequence of 0- and Pi-junction contacts along the interface. We connect this finding to the recently observed h/4e oscillations in (100)/(110) SQUIDS of cuprate superconductors.
Keywords
Cite
@article{arxiv.cond-mat/0410401,
title = {Quartett formation at (100)/(110)-interfaces of d-wave superconductors},
author = {A. A. Aligia and A. P. Kampf and J. Mannhart},
journal= {arXiv preprint arXiv:cond-mat/0410401},
year = {2009}
}
Comments
13 pages, 2 figures