Field-enhanced diamagnetism in the pseudogap state of the cuprate Bi2Sr2CaCu2O8+Î superconductor in an intense magnetic field

Yayu Wang, Lu Li, M. J. Naughton, G. D. Gu, S. Uchida, N. P. Ong

Research output: Contribution to journalArticle

212 Scopus citations

Abstract

In hole-doped cuprates, Nernst experiments imply that the superconducting state is destroyed by spontaneous creation of vortices which destroy phase coherence. Using torque magnetometry on Bi2Sr2CaCu2O8+Î, we uncover a field-enhanced diamagnetic signal M above the transition temperature Tc that increases with applied field to 32Â Tesla and scales just like the Nernst signal. The magnetization results above Tc distinguish M from conventional amplitude fluctuations and strongly support the vortex scenario for the loss of phase coherence at Tc.

Original languageEnglish (US)
Article number247002
JournalPhysical review letters
Volume95
Issue number24
DOIs
StatePublished - Dec 9 2005

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

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