Title
Interface superconductivity in <tex>$LaAlO_{3}-SrTiO_{3}$</tex> heterostructures Interface superconductivity in <tex>$LaAlO_{3}-SrTiO_{3}$</tex> heterostructures
Author
Faculty/Department
Faculty of Sciences. Physics
Publication type
article
Publication
Lancaster, Pa ,
Subject
Physics
Source (journal)
Physical review : B : condensed matter and materials physics. - Lancaster, Pa, 1998 - 2015
Volume/pages
89(2014) :18 , 7 p.
ISSN
1098-0121
1550-235X
1098-0121
Article Reference
184514
Carrier
E-only publicatie
Target language
English (eng)
Full text (Publishers DOI)
Affiliation
University of Antwerp
Abstract
The interface superconductivity in LaAlO3-SrTiO3 heterostructures reveals a nonmonotonic behavior of the critical temperature as a function of the two-dimensional density of charge carriers. We develop a theoretical description of interface superconductivity in strongly polar heterostructures, based on the dielectric function formalism. The density dependence of the critical temperature is calculated, accounting for all phonon branches including different types of optical (interface and half-space) and acoustic phonons. The longitudinal-optic- and acoustic-phonon mediated electron-electron interaction is shown to be the dominating mechanism governing the superconducting phase transition in the heterostructure.
Full text (open access)
https://repository.uantwerpen.be/docman/irua/937c71/7813.pdf
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