Superconducting properties of MgB2 from first principles
Autor(a) principal: | |
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Data de Publicação: | 2007 |
Outros Autores: | , , , , , , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
Texto Completo: | http://hdl.handle.net/10316/4376 https://doi.org/10.1103/PhysRevLett.94.037004 |
Resumo: | The discovery of superconductivity in MgB2, with a rather high transition temperature, has triggered a large number of theoretical and experimental investigations on important issues such as, e.g., the role of gap anisotropy over the Fermi surface (multi-gap superconductivity). We report here the results obtained in this compound using the density functional theory for superconductors, recently proposed by the authors. Without invoking any adjustable parameters, such as [mu]*, we obtain the transition temperature, the gaps, and the specific heat in very good agreement with experiment. Moreover, our calculations allow for a detailed study of how the phonon-mediated attraction and Coulomb repulsion act differently on [sigma] and [pi] states, thereby stabilizing the observed superconducting phase. |
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Superconducting properties of MgB2 from first principlesSuperconductivityThe discovery of superconductivity in MgB2, with a rather high transition temperature, has triggered a large number of theoretical and experimental investigations on important issues such as, e.g., the role of gap anisotropy over the Fermi surface (multi-gap superconductivity). We report here the results obtained in this compound using the density functional theory for superconductors, recently proposed by the authors. Without invoking any adjustable parameters, such as [mu]*, we obtain the transition temperature, the gaps, and the specific heat in very good agreement with experiment. Moreover, our calculations allow for a detailed study of how the phonon-mediated attraction and Coulomb repulsion act differently on [sigma] and [pi] states, thereby stabilizing the observed superconducting phase.http://www.sciencedirect.com/science/article/B6TVJ-4N20714-2/1/b96566edc28b627f83c5f7d5284e03002007info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleaplication/PDFhttp://hdl.handle.net/10316/4376http://hdl.handle.net/10316/4376https://doi.org/10.1103/PhysRevLett.94.037004engPhysica C: Superconductivity. 456:1-2 (2007) 45-53Floris, A.Sanna, A.Lüders, M.Profeta, G.Lathiotakis, N. N.Marques, M. A. L.Franchini, C.Gross, E. K. U.Continenza, A.Massidda, S.info:eu-repo/semantics/openAccessreponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãoinstacron:RCAAP2020-11-06T17:00:08Zoai:estudogeral.uc.pt:10316/4376Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-19T20:59:34.976618Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãofalse |
dc.title.none.fl_str_mv |
Superconducting properties of MgB2 from first principles |
title |
Superconducting properties of MgB2 from first principles |
spellingShingle |
Superconducting properties of MgB2 from first principles Floris, A. Superconductivity |
title_short |
Superconducting properties of MgB2 from first principles |
title_full |
Superconducting properties of MgB2 from first principles |
title_fullStr |
Superconducting properties of MgB2 from first principles |
title_full_unstemmed |
Superconducting properties of MgB2 from first principles |
title_sort |
Superconducting properties of MgB2 from first principles |
author |
Floris, A. |
author_facet |
Floris, A. Sanna, A. Lüders, M. Profeta, G. Lathiotakis, N. N. Marques, M. A. L. Franchini, C. Gross, E. K. U. Continenza, A. Massidda, S. |
author_role |
author |
author2 |
Sanna, A. Lüders, M. Profeta, G. Lathiotakis, N. N. Marques, M. A. L. Franchini, C. Gross, E. K. U. Continenza, A. Massidda, S. |
author2_role |
author author author author author author author author author |
dc.contributor.author.fl_str_mv |
Floris, A. Sanna, A. Lüders, M. Profeta, G. Lathiotakis, N. N. Marques, M. A. L. Franchini, C. Gross, E. K. U. Continenza, A. Massidda, S. |
dc.subject.por.fl_str_mv |
Superconductivity |
topic |
Superconductivity |
description |
The discovery of superconductivity in MgB2, with a rather high transition temperature, has triggered a large number of theoretical and experimental investigations on important issues such as, e.g., the role of gap anisotropy over the Fermi surface (multi-gap superconductivity). We report here the results obtained in this compound using the density functional theory for superconductors, recently proposed by the authors. Without invoking any adjustable parameters, such as [mu]*, we obtain the transition temperature, the gaps, and the specific heat in very good agreement with experiment. Moreover, our calculations allow for a detailed study of how the phonon-mediated attraction and Coulomb repulsion act differently on [sigma] and [pi] states, thereby stabilizing the observed superconducting phase. |
publishDate |
2007 |
dc.date.none.fl_str_mv |
2007 |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://hdl.handle.net/10316/4376 http://hdl.handle.net/10316/4376 https://doi.org/10.1103/PhysRevLett.94.037004 |
url |
http://hdl.handle.net/10316/4376 https://doi.org/10.1103/PhysRevLett.94.037004 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
Physica C: Superconductivity. 456:1-2 (2007) 45-53 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
aplication/PDF |
dc.source.none.fl_str_mv |
reponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação instacron:RCAAP |
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Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação |
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RCAAP |
institution |
RCAAP |
reponame_str |
Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
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Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
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Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação |
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