Probing pairing symmetry in multi-band superconductors by quasiparticle interference

Abstract We study momentum and energy dependencies of the quasiparticle interference (QPI) response function in multiband superconductors in the framework of the strong-coupling Eliashberg approach. Within an effective two-band model we study the s ± and s ++ symmetry cases, corresponding to opposit...

Descripción completa

Guardado en:

Detalles Bibliográficos
Autores principales:	A. Dutt, A. A. Golubov, D. V. Efremov, O. V. Dolgov
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2018
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/3f4182a56f874e13b0a55a4ad1e8b24d
Etiquetas:	Agregar Etiqueta Sin Etiquetas, Sea el primero en etiquetar este registro!

id	oai:doaj.org-article:3f4182a56f874e13b0a55a4ad1e8b24d
record_format	dspace
spelling	oai:doaj.org-article:3f4182a56f874e13b0a55a4ad1e8b24d2021-12-02T15:08:27ZProbing pairing symmetry in multi-band superconductors by quasiparticle interference10.1038/s41598-018-30045-02045-2322https://doaj.org/article/3f4182a56f874e13b0a55a4ad1e8b24d2018-08-01T00:00:00Zhttps://doi.org/10.1038/s41598-018-30045-0https://doaj.org/toc/2045-2322Abstract We study momentum and energy dependencies of the quasiparticle interference (QPI) response function in multiband superconductors in the framework of the strong-coupling Eliashberg approach. Within an effective two-band model we study the s ± and s ++ symmetry cases, corresponding to opposite or equal signs of the order parameters in the bands. We demonstrate that the momentum dependence of the QPI function is strikingly different for s ± and s ++ symmetries of the order parameter at energies close to the small gap. At the same time, the QPI response becomes indistinguishable for both symmetries at higher energies around the large gap. This result may guide future experiments on probing pairing symmetry in iron pnictides as well as in other unconventional superconductors.A. DuttA. A. GolubovD. V. EfremovO. V. DolgovNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 8, Iss 1, Pp 1-9 (2018)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q A. Dutt A. A. Golubov D. V. Efremov O. V. Dolgov Probing pairing symmetry in multi-band superconductors by quasiparticle interference
description	Abstract We study momentum and energy dependencies of the quasiparticle interference (QPI) response function in multiband superconductors in the framework of the strong-coupling Eliashberg approach. Within an effective two-band model we study the s ± and s ++ symmetry cases, corresponding to opposite or equal signs of the order parameters in the bands. We demonstrate that the momentum dependence of the QPI function is strikingly different for s ± and s ++ symmetries of the order parameter at energies close to the small gap. At the same time, the QPI response becomes indistinguishable for both symmetries at higher energies around the large gap. This result may guide future experiments on probing pairing symmetry in iron pnictides as well as in other unconventional superconductors.
format	article
author	A. Dutt A. A. Golubov D. V. Efremov O. V. Dolgov
author_facet	A. Dutt A. A. Golubov D. V. Efremov O. V. Dolgov
author_sort	A. Dutt
title	Probing pairing symmetry in multi-band superconductors by quasiparticle interference
title_short	Probing pairing symmetry in multi-band superconductors by quasiparticle interference
title_full	Probing pairing symmetry in multi-band superconductors by quasiparticle interference
title_fullStr	Probing pairing symmetry in multi-band superconductors by quasiparticle interference
title_full_unstemmed	Probing pairing symmetry in multi-band superconductors by quasiparticle interference
title_sort	probing pairing symmetry in multi-band superconductors by quasiparticle interference
publisher	Nature Portfolio
publishDate	2018
url	https://doaj.org/article/3f4182a56f874e13b0a55a4ad1e8b24d
work_keys_str_mv	AT adutt probingpairingsymmetryinmultibandsuperconductorsbyquasiparticleinterference AT aagolubov probingpairingsymmetryinmultibandsuperconductorsbyquasiparticleinterference AT dvefremov probingpairingsymmetryinmultibandsuperconductorsbyquasiparticleinterference AT ovdolgov probingpairingsymmetryinmultibandsuperconductorsbyquasiparticleinterference
_version_	1718388116440481792

Probing pairing symmetry in multi-band superconductors by quasiparticle interference

Ejemplares similares