NMR relaxation rate in superconducting pnictides: extended $s_{\pm}$ scenario

Simple item page
dc.creatorParker, D.
dc.creatorDolgov, O. V.
dc.creatorKorshunov, M. M.
dc.creatorGolubov, A. A.
dc.creatorMazin, I. I.
dc.date2008-07-23
dc.date2008-09-10
dc.date.accessioned2026-07-07T10:11:11Z
dc.date.available2026-07-07T10:11:11Z
dc.descriptionRecently, several measurements of the nuclear spin lattice relaxation rate $T_{1}^{-1}$ in the newly discovered superconducting Fe-pnictides have been reported. These measurements generally show no coherence peak below $T_{c}$ and indicate a low temperature power law behavior, the characteristics commonly taken as evidence of unconventional superconductivity with lines of nodes crossing the Fermi surface. In this work we show that (i) the lack of a coherence peak is fully consistent with the previously proposed nodeless extended $s_{\pm}$-wave symmetry of the order parameter (whether in the clean or dirty limit) and (ii) the low temperature power law behavior can be also explained in the framework of the same model, but requires going beyond the Born model.
dc.description5 pages, 4 figures (We have dropped the oversimplified Dynes' model for the unitary limit. Rather, we now treat the Born, unitary, and intermediate regimes on the same footing)
dc.identifierhttps://arxiv.org/abs/0807.3729
dc.identifierhttp://arxiv.org/abs/0807.3729
dc.identifierPhys. Rev. B 78, 134524 (2008)
dc.identifierdoi:10.1103/PhysRevB.78.134524
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/171786
dc.subjectSuperconductivity
dc.subjectStrongly Correlated Electrons
dc.titleNMR relaxation rate in superconducting pnictides: extended $s_{\pm}$ scenario
dc.typetext

Files

Collections

arXiv