d-Wave vortex and pseudogap in underdoped high-Tc cuprate YBa2Cu4O8

High-magnetic-field NMR

Guo-Qing Zheng, W. G. Clark, Y. Kitaoka, K. Asayama, Y. Kodama, P. Kuhns, W. G. Moulton

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

The responses to the magnetic field (H) of the superconductivity and the pseudogap in the underdoped high-Tc cuprate YBa2Cu4O8 (Tc = 74 K) are reported up to 23.2 T based on NMR measurements. For temperatures T≤15 K, the H and T-variation of the 63Cu nuclear spin-lattice relaxation rate (1/T1) is 1/T1∝TH and also the Knight shift increases with increasing H. We interpret our results as evidence for H-induced quasiparticle states that extend from the d-wave vortex centers with an ungapped spectrum. Even though H = 23.2 T reduces Tc by 19 K, no effect is seen on the normal-state pseudogap which persists in the temperature region where the superconductivity is destroyed by the field, suggesting that it is a consequence of strong electron correlations.

Original languageEnglish
Pages (from-to)901-903
Number of pages3
JournalPhysica B: Condensed Matter
Volume281-282
DOIs
Publication statusPublished - Jun 1 2000
Externally publishedYes

Fingerprint

Superconductivity
cuprates
Vortex flow
superconductivity
Nuclear magnetic resonance
vortices
Magnetic fields
Electron correlations
nuclear magnetic resonance
Spin-lattice relaxation
magnetic fields
spin-lattice relaxation
nuclear spin
Temperature
temperature
electrons

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics

Cite this

d-Wave vortex and pseudogap in underdoped high-Tc cuprate YBa2Cu4O8 : High-magnetic-field NMR. / Zheng, Guo-Qing; Clark, W. G.; Kitaoka, Y.; Asayama, K.; Kodama, Y.; Kuhns, P.; Moulton, W. G.

In: Physica B: Condensed Matter, Vol. 281-282, 01.06.2000, p. 901-903.

Research output: Contribution to journalArticle

Zheng, Guo-Qing ; Clark, W. G. ; Kitaoka, Y. ; Asayama, K. ; Kodama, Y. ; Kuhns, P. ; Moulton, W. G. / d-Wave vortex and pseudogap in underdoped high-Tc cuprate YBa2Cu4O8 : High-magnetic-field NMR. In: Physica B: Condensed Matter. 2000 ; Vol. 281-282. pp. 901-903.
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