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Electronic structure, magnetic and Fermi surface calculations of heavy-fermions superconductors compounds based on Nb3Sn

Link to publisher's homepage at http://www.unimap.edu.my/ ; Open access only applicable for vol. 1; issue 1, 2008.

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Bibliographic Details
Main Author: Bendjemil, Badis
Format: Article
Language:English
Published: Universiti Malaysia Perlis 2008
Subjects:
Fermi surfaces
Fermi velocity
Superconducting-gap
LSDA
FPLO
Electronic structure
Online Access:http://dspace.unimap.edu.my/xmlui/handle/123456789/2372
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spelling my.unimap-23722008-10-18T03:27:32Z Electronic structure, magnetic and Fermi surface calculations of heavy-fermions superconductors compounds based on Nb3Sn Bendjemil, Badis Fermi surfaces Fermi velocity Superconducting-gap LSDA FPLO Electronic structure Link to publisher's homepage at http://www.unimap.edu.my/ ; Open access only applicable for vol. 1; issue 1, 2008. We report a theoretical investigation of the electronic structures and Fermi surface of the heavy-fermion superconductors Nb3Sn. The electronic structures are investigated ab-initio on the basis of full-potential local orbital minimum-basis band- structure calculations (FPLO), adopting both the scalar- and fully relativistic formulations within the framework of the local spin-density approximation (LSDA). The possibility of a partial 4d localization occurring for compounds is discussed. The electronic structures of the Nb3Sn compounds are computed to be rather similar to the literature. Our total-energy calculations predict paramagnetic and ferromagnetic order to be favorable for Nb3Sn materials, which is, however, observed experimentally. Also, the calculated magnetic moment is 0.35 μB. Furthermore, the theoretical Fermi surfaces topology and the possible origins of the superconductivity are discussed. The Bardeen, Cooper and Schreiffer (BCS) energy gap and the Ginzburg-Landau (GL) parameter K for these compounds have been calculated from the Fermi velocity. We found strong indication suggesting the existence of a second superconducting (SC) gap in Nb3Sn. In addition, the average superconductivity-gap at zero temperature is calculated for this compound. The knowledge of energy gap value gives important information on the coupling scenarios. Our results provide an explanation between the electronic structures, the Fermi surface (FS) topology and two-band model of the superconductivity. 2008-10-10T03:40:01Z 2008-10-10T03:40:01Z 2008 Article International Journal of Nanoelectronics and Materials, vol. 1 (1), 2008, pages 91-99. 1985-5761 (Printed) 1997-4434 (Online) http://www.unimap.edu.my http://hdl.handle.net/123456789/2372 en Universiti Malaysia Perlis
institution Universiti Malaysia Perlis
building UniMAP Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Malaysia Perlis
content_source UniMAP Library Digital Repository
url_provider http://dspace.unimap.edu.my/
language English
topic Fermi surfaces
Fermi velocity
Superconducting-gap
LSDA
FPLO
Electronic structure
spellingShingle Fermi surfaces
Fermi velocity
Superconducting-gap
LSDA
FPLO
Electronic structure
Bendjemil, Badis
Electronic structure, magnetic and Fermi surface calculations of heavy-fermions superconductors compounds based on Nb3Sn
description Link to publisher's homepage at http://www.unimap.edu.my/ ; Open access only applicable for vol. 1; issue 1, 2008.
format Article
author Bendjemil, Badis
author_facet Bendjemil, Badis
author_sort Bendjemil, Badis
title Electronic structure, magnetic and Fermi surface calculations of heavy-fermions superconductors compounds based on Nb3Sn
title_short Electronic structure, magnetic and Fermi surface calculations of heavy-fermions superconductors compounds based on Nb3Sn
title_full Electronic structure, magnetic and Fermi surface calculations of heavy-fermions superconductors compounds based on Nb3Sn
title_fullStr Electronic structure, magnetic and Fermi surface calculations of heavy-fermions superconductors compounds based on Nb3Sn
title_full_unstemmed Electronic structure, magnetic and Fermi surface calculations of heavy-fermions superconductors compounds based on Nb3Sn
title_sort electronic structure, magnetic and fermi surface calculations of heavy-fermions superconductors compounds based on nb3sn
publisher Universiti Malaysia Perlis
publishDate 2008
url http://dspace.unimap.edu.my/xmlui/handle/123456789/2372
_version_ 1643787591588249600
score 13.222552

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