| Issue |
Europhys. Lett.
Volume 58, Number 4, May 2002
|
|
|---|---|---|
| Page(s) | 549 - 554 | |
| Section | Condensed matter: electronic structure, electrical, magnetic, and optical properties | |
| DOI | https://doi.org/10.1209/epl/i2002-00431-5 | |
| Published online | 01 May 2002 | |
Density of states in doped metal with d-wave superconducting order parameter
1
Bogolyubov Institute for Theoretical Physics,
NAS of Ukraine Metrologichna str. 14b, 03143 Kiev,
Ukraine
2
CFP and Departmento de Física da Faculdade
de Ciências da Universidade do Porto - Rua do Campo
Alegre, 687, 4169-007 Porto, Portugal
Received:
23
August
2001
Accepted:
27
February
2002
Using the Lifshitz model for a doped 2D system in the case when
the number of charge carriers equals the number of dopant impurity
centers, the possibility for the onset of d-wave superconducting
state has been studied. A non-perturbative treatment of the
density of states 
in this system showed that,
under strong enough impurity perturbation, it can display a
resonance feature deep inside the gap. Yet closer to the gap
center, 
is found to vanish asymptotically as
at
.
PACS: 71.55.-i – Impurity and defect levels / 74.25.-q – General properties; correlations between physical properties in normal and superconducting states / 74.62.Dh – Effects of crystal defects, doping and substitution
© EDP Sciences, 2002
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