Strong-coupling superconductivity due to soft boson modes in MgB_2, cuprates, borocarbides and some heavy fermions

Lampakis, D; Tatsi, A; Liarokapis, E; Varelogiannis, G; Oppeneer, P; Pissas, M; Nishizaki, T

dc.contributor.author	Lampakis, D	en
dc.contributor.author	Tatsi, A	en
dc.contributor.author	Liarokapis, E	en
dc.contributor.author	Varelogiannis, G	en
dc.contributor.author	Oppeneer, P	en
dc.contributor.author	Pissas, M	en
dc.contributor.author	Nishizaki, T	en
dc.date.accessioned	2014-03-01T01:50:58Z
dc.date.available	2014-03-01T01:50:58Z
dc.date.issued	2001	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/26190
dc.relation.uri	http://arxiv.org/abs/cond-mat/0105447	en
dc.subject	Heavy Fermion	en
dc.subject	Low Energy	en
dc.subject	Spectrum	en
dc.subject	Strong Coupling	en
dc.subject	Superconductors	en
dc.title	Strong-coupling superconductivity due to soft boson modes in MgB_2, cuprates, borocarbides and some heavy fermions	en
heal.type	journalArticle	en
heal.publicationDate	2001	en
heal.abstract	We report micro-Raman measurements that reveal a low-energy soft mode at16-19 meV in MgB_2 which becomes sharper in the superconducting state. With aboson spectrum based on this mode we reproduce, within Eliashberg theory, theT_c, the T-shape of the NMR relaxation rate as well as unusual dip-humpfeatures in available tunneling data. We compare MgB_2 to cuprates,borocarbides	en