Subgap states in two-dimensional spectroscopy of graphene-based superconducting hybrid junctions
Several 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 eme...
- Autores:
-
Casas, Oscar E.
Levy Yeyati, Alfredo
Burset, Pablo
Herrera, William J.
Gómez Páez, Shirley
- Tipo de recurso:
- Fecha de publicación:
- 2019
- Institución:
- Universidad El Bosque
- Repositorio:
- Repositorio U. El Bosque
- Idioma:
- eng
- OAI Identifier:
- oai:repositorio.unbosque.edu.co:20.500.12495/1746
- Palabra clave:
- Superconductividad
Conductividad Eléctrica
Genes
- Rights
- License
- Acceso cerrado
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dc.title.spa.fl_str_mv |
Subgap states in two-dimensional spectroscopy of graphene-based superconducting hybrid junctions |
title |
Subgap states in two-dimensional spectroscopy of graphene-based superconducting hybrid junctions |
spellingShingle |
Subgap states in two-dimensional spectroscopy of graphene-based superconducting hybrid junctions Superconductividad Conductividad Eléctrica Genes |
title_short |
Subgap states in two-dimensional spectroscopy of graphene-based superconducting hybrid junctions |
title_full |
Subgap states in two-dimensional spectroscopy of graphene-based superconducting hybrid junctions |
title_fullStr |
Subgap states in two-dimensional spectroscopy of graphene-based superconducting hybrid junctions |
title_full_unstemmed |
Subgap states in two-dimensional spectroscopy of graphene-based superconducting hybrid junctions |
title_sort |
Subgap states in two-dimensional spectroscopy of graphene-based superconducting hybrid junctions |
dc.creator.fl_str_mv |
Casas, Oscar E. Levy Yeyati, Alfredo Burset, Pablo Herrera, William J. Gómez Páez, Shirley |
dc.contributor.author.none.fl_str_mv |
Casas, Oscar E. Levy Yeyati, Alfredo Burset, Pablo Herrera, William J. Gómez Páez, Shirley |
dc.subject.decs.spa.fl_str_mv |
Superconductividad Conductividad Eléctrica Genes |
topic |
Superconductividad Conductividad Eléctrica Genes |
description |
Several 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. |
publishDate |
2019 |
dc.date.accessioned.none.fl_str_mv |
2019-09-24T21:23:33Z |
dc.date.available.none.fl_str_mv |
2019-09-24T21:23:33Z |
dc.date.issued.none.fl_str_mv |
2019 |
dc.type.spa.fl_str_mv |
article |
dc.type.coarversion.fl_str_mv |
http://purl.org/coar/version/c_970fb48d4fbd8a85 |
dc.type.coar.fl_str_mv |
http://purl.org/coar/resource_type/c_6501 |
dc.type.local.spa.fl_str_mv |
artículo |
dc.identifier.issn.none.fl_str_mv |
2469-9969 |
dc.identifier.uri.none.fl_str_mv |
http://hdl.handle.net/20.500.12495/1746 |
dc.identifier.doi.none.fl_str_mv |
https://doi.org/10.1103/PhysRevB.99.144502 |
dc.identifier.instname.spa.fl_str_mv |
instname:Universidad El Bosque |
dc.identifier.reponame.spa.fl_str_mv |
reponame:Repositorio Institucional Universidad El Bosque |
dc.identifier.repourl.none.fl_str_mv |
repourl:https://repositorio.unbosque.edu.co |
identifier_str_mv |
2469-9969 instname:Universidad El Bosque reponame:Repositorio Institucional Universidad El Bosque repourl:https://repositorio.unbosque.edu.co |
url |
http://hdl.handle.net/20.500.12495/1746 https://doi.org/10.1103/PhysRevB.99.144502 |
dc.language.iso.none.fl_str_mv |
eng |
language |
eng |
dc.relation.ispartofseries.spa.fl_str_mv |
Physical Review B, 2469-9950, Vol. 99, Nro, 14, 2019 P. 1445021 2-144502 15 |
dc.relation.uri.none.fl_str_mv |
https://journals.aps.org/prb/abstract/10.1103/PhysRevB.99.144502 |
dc.rights.coar.fl_str_mv |
http://purl.org/coar/access_right/c_abf2 |
dc.rights.local.spa.fl_str_mv |
Acceso cerrado |
dc.rights.accessrights.none.fl_str_mv |
http://purl.org/coar/access_right/c_abf66 |
dc.rights.creativecommons.none.fl_str_mv |
2019 |
rights_invalid_str_mv |
Acceso cerrado http://purl.org/coar/access_right/c_abf66 2019 http://purl.org/coar/access_right/c_abf2 |
dc.format.mimetype.none.fl_str_mv |
application/pdf |
dc.publisher.spa.fl_str_mv |
American Physical Society |
dc.publisher.journal.spa.fl_str_mv |
Physical Review B |
institution |
Universidad El Bosque |
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Casas, Oscar E.Levy Yeyati, AlfredoBurset, PabloHerrera, William J.Gómez Páez, Shirley2019-09-24T21:23:33Z2019-09-24T21:23:33Z20192469-9969http://hdl.handle.net/20.500.12495/1746https://doi.org/10.1103/PhysRevB.99.144502instname:Universidad El Bosquereponame:Repositorio Institucional Universidad El Bosquerepourl:https://repositorio.unbosque.edu.coapplication/pdfengAmerican Physical SocietyPhysical Review BPhysical Review B, 2469-9950, Vol. 99, Nro, 14, 2019 P. 1445021 2-144502 15https://journals.aps.org/prb/abstract/10.1103/PhysRevB.99.144502Subgap states in two-dimensional spectroscopy of graphene-based superconducting hybrid junctionsarticleartículohttp://purl.org/coar/version/c_970fb48d4fbd8a85http://purl.org/coar/resource_type/c_6501SuperconductividadConductividad EléctricaGenesSeveral 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.Acceso cerradohttp://purl.org/coar/access_right/c_abf662019http://purl.org/coar/access_right/c_abf2ORIGINALCasas O.E., Páez S.G., Levy Yeyati A., Burset P., Herrera W.J._2019.pdfCasas O.E., Páez S.G., Levy Yeyati A., Burset P., Herrera W.J._2019.pdfapplication/pdf2510884https://repositorio.unbosque.edu.co/bitstreams/067c9959-da47-4a99-921c-631dc1bf1e9e/download7831d74fd4d23e12437f6fcaf421bd15MD51LICENSElicense.txtlicense.txttext/plain; charset=utf-81748https://repositorio.unbosque.edu.co/bitstreams/093805ed-f2e3-49c7-b73c-c555ea95c625/download8a4605be74aa9ea9d79846c1fba20a33MD52THUMBNAILCasas O.E., Páez S.G., Levy Yeyati A., Burset P., Herrera W.J._2019.pdf.jpgCasas O.E., Páez S.G., Levy Yeyati A., Burset P., Herrera W.J._2019.pdf.jpgIM Thumbnailimage/jpeg6772https://repositorio.unbosque.edu.co/bitstreams/a04c6373-eac4-475c-94db-5c6e095a8d3f/download259943c197f30557cc092079a479c6acMD53TEXTCasas O.E., Páez S.G., Levy Yeyati A., Burset P., Herrera W.J._2019.pdf.txtCasas O.E., Páez S.G., Levy Yeyati A., Burset P., Herrera W.J._2019.pdf.txtExtracted texttext/plain92894https://repositorio.unbosque.edu.co/bitstreams/30e149c0-15e5-4601-a46a-81fa4b54cce0/downloadef56dc7c784cba79621a74061873da36MD5420.500.12495/1746oai:repositorio.unbosque.edu.co:20.500.12495/17462024-02-07 03:15:37.973restrictedhttps://repositorio.unbosque.edu.coRepositorio Institucional Universidad El Bosquebibliotecas@biteca.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 |