Work

Local modulations of the spin-fluctuation-mediated pairing interaction by impurities in d -wave superconductors

Year: 2012

Type: article

Abstract: We present a self-consistent real space formulation of spin-fluctuation mediated $d$-wave pairing. By calculating all relevant inhomogeneous spin and charge susceptibilities in real space within the random phase approximation (RPA), we obtain the effective pairing interaction and study its spatial dependence near both local potential and hopping impurities. A remarkably large enhancement of the pairing interaction may be obtained near the impurity site. We discuss the relevance of our result to inhomogeneities observed by scanning tunneling spectroscopy on the surface of cuprate superconductors.

Source: Physical Review B

DOI: 10.1103/physrevb.86.054507

Authors: A. T. Rømer, S. Graser, T. S. Nunner, P. J. Hirschfeld, B. M. Andersen

Institutions: University of Copenhagen, University of Augsburg, Freie Universität Berlin, University of Florida

Language: English

Topic: Physics of Superconductivity and Magnetism

Subfield: Condensed Matter Physics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: bronze

Funders: National Science Foundation, Danmarks Frie Forskningsfond, Division of Materials Research

Awards: G4347669415, Disorder and the emergence of inhomogeneous phases in strongly correlated electron systems