Small-q electron-phonon interaction and the phase diagram of the cuprates

Varelogiannis, G

dc.contributor.author	Varelogiannis, G	en
dc.date.accessioned	2014-03-01T01:27:15Z
dc.date.available	2014-03-01T01:27:15Z
dc.date.issued	2007	en
dc.identifier.issn	0921-4534	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/18368
dc.subject	High-Tc	en
dc.subject	Pseudogap	en
dc.subject	Small-q	en
dc.subject.classification	Physics, Applied	en
dc.subject.other	Doping (additives)	en
dc.subject.other	Electron-phonon interactions	en
dc.subject.other	Heat transfer	en
dc.subject.other	Phase diagrams	en
dc.subject.other	Superconductivity	en
dc.subject.other	Particle-hole asymmetry	en
dc.subject.other	Thermal transport	en
dc.subject.other	Transition line	en
dc.subject.other	Oxide superconductors	en
dc.title	Small-q electron-phonon interaction and the phase diagram of the cuprates	en
heal.type	journalArticle	en
heal.identifier.primary	10.1016/j.physc.2007.03.236	en
heal.identifier.secondary	http://dx.doi.org/10.1016/j.physc.2007.03.236	en
heal.language	English	en
heal.publicationDate	2007	en
heal.abstract	We have considered the influence of the momentum structure of the effective electron-phonon interaction on the competition of CDW and superconductivity. Keeping exactly the same effective interaction in both channels (which is natural since both SC and CDW are driven by the same electron-phonon interaction), we produce a phase diagram that shows remarkable similarities with that of the cuprates if we associate the pseudogap with a CDW and the doping effect with particle-hole asymmetry. When the electron-phonon interaction is dominated by the small wavevectors, we can obtain a d-wave superconducting dome, a CDW that follows the behavior of the pseudogap and more surprisingly, a transition with rising temperature from d-wave CDW to s-wave CDW in the underdoped regime. Our d-wave CDW state at low-T provides the first theoretical explanation of recent thermal transport results that identify the same nodal excitations on both sides of the transition line from the non-superconducting to the superconducting regime [M. Sutherland et al., Phys. Rev. Lett. 94 (2005) 147004]. © 2007 Elsevier B.V. All rights reserved.	en
heal.publisher	ELSEVIER SCIENCE BV	en
heal.journalName	Physica C: Superconductivity and its Applications	en
dc.identifier.doi	10.1016/j.physc.2007.03.236	en
dc.identifier.isi	ISI:000249870600192	en
dc.identifier.volume	460-462 II	en
dc.identifier.issue	SPEC. ISS.	en
dc.identifier.spage	1125	en
dc.identifier.epage	1126	en