Entropy of vortex cores on the border of the superconductor-to-insulator transition in an underdoped cuprate

C. Capan, K. Behnia, J. Hinderer, A.G.M. Jansen, Wolfgang Lang, C. Marcenat, C. Marin, J. Flouquet

Veröffentlichungen: Beitrag in FachzeitschriftArtikelPeer Reviewed

Abstract

We present a study of Nernst effect in underdoped La2-xSrxCuO4 in magnetic fields as high as 28 T. At high fields, a sizable Nernst signal was found to persist in the presence of a field-induced nonmetallic resistivity. By simultaneously measuring resistivity and the Nernst coefficient, we extract the entropy of vortex cores in the vicinity of this field-induced superconductor-insulator transition. Moreover, the temperature dependence of the thermoelectric Hall angle provides strong constraints on the possible origins of the finite Nernst signal above Tc, as recently discovered by Xu et al. [Nature (London) 406, 486 (2000)].
OriginalspracheEnglisch
Aufsatznummer056601
Seitenumfang4
FachzeitschriftPhysical Review Letters
Jahrgang88
Ausgabenummer5
Frühes Online-Datum17 Jan. 2002
DOIs
PublikationsstatusVeröffentlicht - 4 Feb. 2002

ÖFOS 2012

  • 103033 Supraleitung
  • 103009 Festkörperphysik

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