Superconductivity properties of compound MgB2 on basis of two-band model

The theory of thermodynamic properties of two-band superconductor with reduced den- sity of charge carriers is developed on the basis of phonon superconducting mechanism with strong electron-phonon interaction. This theory is adapted to describe the behavior of critical temperature TC, energy gap...

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Autores principales:	Palistrant, Maria, Ursu, Vasile
Formato:	article
Lenguaje:	EN
Publicado:	D.Ghitu Institute of Electronic Engineering and Nanotechnologies 2007
Materias:	Physics QC1-999 Electronics TK7800-8360
Acceso en línea:	https://doaj.org/article/28a945d7f7e947558d17a81eec5f8629
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spelling	oai:doaj.org-article:28a945d7f7e947558d17a81eec5f86292021-11-21T12:07:58ZSuperconductivity properties of compound MgB2 on basis of two-band model 2537-63651810-648Xhttps://doaj.org/article/28a945d7f7e947558d17a81eec5f86292007-05-01T00:00:00Zhttps://mjps.nanotech.md/archive/2007/article/3706https://doaj.org/toc/1810-648Xhttps://doaj.org/toc/2537-6365The theory of thermodynamic properties of two-band superconductor with reduced den- sity of charge carriers is developed on the basis of phonon superconducting mechanism with strong electron-phonon interaction. This theory is adapted to describe the behavior of critical temperature TC, energy gaps Δ1, Δ2, and the relative jump of electron specific heat (CS-CN)/CN in the point T = TC along with the variation of charge carrier density in the compound MgB2 when substitutional impurities with different valence are introduced into the system. It is shown, that according to the filling mechanism of energy bands which overlap on the Fermi surface, the quantities TC, Δ1, Δ2 decrease when this compound is doped with electrons and remain constant or weakly change when the system is doped with holes. The theory qualitatively agrees with the experimental data. It is also shown that the consideration of inter- and intraband scattering of electrons on impurity potential improves this agreement. Palistrant, MariaUrsu, VasileD.Ghitu Institute of Electronic Engineering and NanotechnologiesarticlePhysicsQC1-999ElectronicsTK7800-8360ENMoldavian Journal of the Physical Sciences, Vol 6, Iss 2, Pp 166-173 (2007)
institution	DOAJ
collection	DOAJ
language	EN
topic	Physics QC1-999 Electronics TK7800-8360
spellingShingle	Physics QC1-999 Electronics TK7800-8360 Palistrant, Maria Ursu, Vasile Superconductivity properties of compound MgB2 on basis of two-band model
description	The theory of thermodynamic properties of two-band superconductor with reduced den- sity of charge carriers is developed on the basis of phonon superconducting mechanism with strong electron-phonon interaction. This theory is adapted to describe the behavior of critical temperature TC, energy gaps Δ1, Δ2, and the relative jump of electron specific heat (CS-CN)/CN in the point T = TC along with the variation of charge carrier density in the compound MgB2 when substitutional impurities with different valence are introduced into the system. It is shown, that according to the filling mechanism of energy bands which overlap on the Fermi surface, the quantities TC, Δ1, Δ2 decrease when this compound is doped with electrons and remain constant or weakly change when the system is doped with holes. The theory qualitatively agrees with the experimental data. It is also shown that the consideration of inter- and intraband scattering of electrons on impurity potential improves this agreement.
format	article
author	Palistrant, Maria Ursu, Vasile
author_facet	Palistrant, Maria Ursu, Vasile
author_sort	Palistrant, Maria
title	Superconductivity properties of compound MgB2 on basis of two-band model
title_short	Superconductivity properties of compound MgB2 on basis of two-band model
title_full	Superconductivity properties of compound MgB2 on basis of two-band model
title_fullStr	Superconductivity properties of compound MgB2 on basis of two-band model
title_full_unstemmed	Superconductivity properties of compound MgB2 on basis of two-band model
title_sort	superconductivity properties of compound mgb2 on basis of two-band model
publisher	D.Ghitu Institute of Electronic Engineering and Nanotechnologies
publishDate	2007
url	https://doaj.org/article/28a945d7f7e947558d17a81eec5f8629
work_keys_str_mv	AT palistrantmaria superconductivitypropertiesofcompoundmgb2onbasisoftwobandmodel AT ursuvasile superconductivitypropertiesofcompoundmgb2onbasisoftwobandmodel
_version_	1718419174455246848

Superconductivity properties of compound MgB2 on basis of two-band model

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