Naslov
Effects of nonmagnetic impurities on spin-fluctuation induced superconductivaity

Autori
Dusuel, S. ; Zanchi, D.

Izvornik
Physical Review Letters (0031-9007) 93 (2004), 20; 206401, 4

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
QUASI-PARTICLES ; FERMI-SURFACE

Sažetak
We study the effects of nonmagnetic impurities on the phase diagram of a system of interacting electrons with a flat Fermi surface. The one-loop Wilsonian renormalization group flow of the angle dependent diffusion function D(theta(1), theta(2), theta(3)) and interaction U(theta(1), theta(2), theta(3)) determines the critical temperature and the nature of the low temperature state. As the imperfect nesting increases, the critical temperature decreases, and the low temperature phase changes from the spin-density wave (SDW) to the d-wave superconductivity (dSC) and finally, for bad nesting, to the charge-localized state. Both SDW and dSC phases are affected by disorder. The pair breaking depends on the imperfect nesting and is the most efficient when the critical temperature for superconductivity is maximal.

Izvorni jezik
Engleski

Znanstvena područja
Fizika

POVEZANOST RADA