Small-q phonon-mediated unconventional superconductivity in the iron pnictides

Aperis, A; Kotetes, P; Varelogiannis, G; Oppeneer, PM

dc.contributor.author	Aperis, A	en
dc.contributor.author	Kotetes, P	en
dc.contributor.author	Varelogiannis, G	en
dc.contributor.author	Oppeneer, PM	en
dc.date.accessioned	2014-03-01T01:37:06Z
dc.date.available	2014-03-01T01:37:06Z
dc.date.issued	2011	en
dc.identifier.issn	1098-0121	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/21444
dc.subject.classification	Physics, Condensed Matter	en
dc.subject.other	BA0.6K0.4FE2AS2	en
dc.subject.other	TEMPERATURE	en
dc.subject.other	DEPENDENCE	en
dc.subject.other	YBA2CU3O7	en
dc.subject.other	SYSTEMS	en
dc.subject.other	GAP	en
dc.title	Small-q phonon-mediated unconventional superconductivity in the iron pnictides	en
heal.type	journalArticle	en
heal.identifier.primary	10.1103/PhysRevB.83.092505	en
heal.identifier.secondary	http://dx.doi.org/10.1103/PhysRevB.83.092505	en
heal.identifier.secondary	092505	en
heal.language	English	en
heal.publicationDate	2011	en
heal.abstract	We report self-consistent calculations of the gap symmetry for iron-based high-temperature superconductors using realistic small-q phonon-mediated pairing potentials and four-band energy dispersions. When both electron and hole Fermi surface pockets are present, we obtain the nodeless s± state that was first encountered in a spin-fluctuation mechanism picture. Nodal s± as well as other gap structures such as dx2-y2, s±+dx2-y2, and even a p-wave triplet state, are accessible upon doping within our phononic mechanism. Our results resolve the conflict between phase-sensitive experiments reporting a gap changing sign, attributed previously only to a nonphononic mechanism, and isotope effect measurements proving the involvement of phonons in the pairing. © 2011 American Physical Society.	en
heal.publisher	AMER PHYSICAL SOC	en
heal.journalName	Physical Review B - Condensed Matter and Materials Physics	en
dc.identifier.doi	10.1103/PhysRevB.83.092505	en
dc.identifier.isi	ISI:000288645900002	en
dc.identifier.volume	83	en
dc.identifier.issue	9	en