THE FLOW-EQUATION METHOD FOR THE SINGLE IMPURITY IN A 2D SUPERCONDUCTOR

Authors
CRISAN M MOCA CP TIFREA I
Citation
M. Crisan et al., THE FLOW-EQUATION METHOD FOR THE SINGLE IMPURITY IN A 2D SUPERCONDUCTOR, Journal of superconductivity, 10(3), 1997, pp. 251-255
Citations number
8
Categorie Soggetti
Physics, Applied","Physics, Condensed Matter
Journal title
Journal of superconductivity → ACNP
ISSN journal
08961107
Volume
10
Issue
3
Year of publication
1997
Pages
251 - 255
Database
ISI
SICI code
0896-1107(1997)10:3<251:TFMFTS>2.0.ZU;2-0
Abstract
Following the flow equations given by Wegner, we study the single impu rity state in a 2D superconductor with an energy-dependent density of states. The Anderson model with U=0 has been used to perform analytica l calculations of the single impurity energy in a superconductor with different energy spectrum. We showed that the single impurity energy i s drastically affected by an energy-dependent density of states. For t he 2D van Hove superconductor the correction is of the order of Delta( 2).