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Publication
Title
Magnetization measurements and Ginzburg-Landau simulations of micron-size -tin samples : evidence for an unusual critical behavior of mesoscopic type-I superconductors
Author
Müller, André
Milošević, Milorad V.
Dale, Sara E.C.
Engbarth, Miles A.
Bending, Simon J.
Abstract
We describe investigations of the largely unexplored field of mesoscopic type-I superconductors. Micromagnetometry and 3D Ginzburg-Landau simulations of our single crystal β-tin samples in this regime reveal size- and temperature-dependent supercritical fields whose behavior is radically different from the bulk critical field HcB. We find that complete suppression of the intermediate state in medium-size samples can result in a surprising reduction of the critical field significantly below HcB. We also reveal an evolution of the superconducting-to-normal phase transition from the expected irreversible first order at low temperatures through the previously unobserved reversible first-order to a second-order transition close to Tc, where the critical field can be many times larger than HcB. Finally, we have identified striking correlations between the mesoscopic Hc3 for nucleation of surface superconductivity and the thermodynamic Hc near Tc. All these observations are entirely unexpected in the conventional type-I picture.
Language
English
Source (journal)
Physical review letters. - New York, N.Y., 1958, currens
Publication
New York, N.Y.
:
American Physical Society
,
2012
ISSN
0031-9007 [print]
1079-7114 [online]
DOI
10.1103/PHYSREVLETT.109.197003
Volume/pages
109 :19 (2012) , 5 p.
Article Reference
197003
ISI
000310853100017
Medium
E-only publicatie
Full text (Publisher's DOI)
https://doi.org/10.1103/PHYSREVLETT.109.197003
Full text (open access)
https://repository.uantwerpen.be/docman/irua/50655f/416c3325.pdf
UAntwerpen
Faculty/Department
Faculty of Sciences. Physics
Research group
Condensed Matter Theory
Publication type
A1 Journal article
Subject
Physics
Affiliation
Publications with a UAntwerp address
External links
Web of Science
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Record
Identifier
c:irua:102401
Creation
18.12.2012
Last edited
22.08.2024
To cite this reference
https://hdl.handle.net/10067/1024010151162165141
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