Subgap states in two-dimensional spectroscopy of graphene-based superconducting hybrid junctions

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dc.contributor.authorCasas, Oscar E.
dc.contributor.authorLevy Yeyati, Alfredo
dc.contributor.authorBurset, Pablo
dc.contributor.authorHerrera, William J.
dc.contributor.authorGómez Páez, Shirley
dc.date.accessioned2019-09-24T21:23:33Z
dc.date.available2019-09-24T21:23:33Z
dc.date.issued2019
dc.description.abstractenglishSeveral recent works have predicted that unconventional and topological superconductivity can arise in graphene, either intrinsically or by proximity effect. Then, the analysis of the spectroscopic and transport properties in graphene would be a valuable source of information in the study of the emergent superconducting order parameter. Using Green's functions techniques, we study the transport properties of a finite size ballistic graphene layer placed between a normal state electrode and a graphene lead with proximity-induced unconventional superconductivity. Our microscopic description of such a junction allows us to consider the effect of edge states in the graphene layer and the imperfect coupling to the electrodes. The tunnel conductance through the junction and the spectral density of states feature a rich interplay between graphene's edge states, interface bound states formed at the graphene-superconductor junction, Fabry-Pérot resonances originated from the finite size of the graphene layer, and the characteristic Andreev surface states of unconventional superconductors. Within our analytical formalism, we identify the separate contribution from each of these subgap states to the conductance and density of states. Our results provide an advisable tool to determine experimentally the pairing symmetry of unconventional superconductivity that can arise in graphene.eng
dc.format.mimetypeapplication/pdf
dc.identifier.doihttps://doi.org/10.1103/PhysRevB.99.144502
dc.identifier.instnameinstname:Universidad El Bosquespa
dc.identifier.issn2469-9969
dc.identifier.reponamereponame:Repositorio Institucional Universidad El Bosquespa
dc.identifier.repourlrepourl:https://repositorio.unbosque.edu.co
dc.identifier.urihttps://hdl.handle.net/20.500.12495/1746
dc.language.isoeng
dc.publisherAmerican Physical Societyspa
dc.publisher.journalPhysical Review Bspa
dc.relation.ispartofseriesPhysical Review B, 2469-9950, Vol. 99, Nro, 14, 2019 P. 1445021 2-144502 15spa
dc.relation.urihttps://journals.aps.org/prb/abstract/10.1103/PhysRevB.99.144502
dc.rights.accessrightsinfo:eu-repo/semantics/openAccess
dc.rights.accessrightshttps://purl.org/coar/access_right/c_abf66
dc.rights.creativecommons2019
dc.rights.localAcceso cerradospa
dc.subject.decsSuperconductividadspa
dc.subject.decsConductividad Eléctricaspa
dc.subject.decsGenesspa
dc.titleSubgap states in two-dimensional spectroscopy of graphene-based superconducting hybrid junctionsspa
dc.typearticlespa
dc.type.hasversioninfo:eu-repo/semantics/publishedVersion
dc.type.localartículospa

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