Extended quasiparticle states outside the vortex cores in a d-wave superconductor

Research output: Contribution to journalArticle

Abstract

We a describe a measurement of the spin Knight shift (Ks) around the middle point between two vortices as a function of magnetic field (H) up to 28 T in a high-Tc superconductor TlSr2CaCu 2O6.8. At low temperatures, Ks increases substantially with increasing field, which indicates that the quasiparticle states with an ungapped spectrum are extended outside the vortex cores in a d-wave superconductor. The density of such states is found to be ∼0.7N 0√H/Hc2, with No being the normal-state density of states and Hc2 being the upper critical field.

Original languageEnglish
Pages (from-to)3509-3512
Number of pages4
JournalInternational Journal of Modern Physics B
Volume17
Issue number18-20 II
DOIs
Publication statusPublished - Aug 10 2003
Externally publishedYes

Keywords

  • D-wave superconductor
  • NMR
  • Quasiparticle state
  • Vortex

ASJC Scopus subject areas

  • Statistical and Nonlinear Physics
  • Condensed Matter Physics

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