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

doi:10.1016/S0921-4526(99)01161-8

d-Wave vortex and pseudogap in underdoped high-T_c 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 journal › Conference article

2 Citations (Scopus)

Abstract

The responses to the magnetic field (H) of the superconductivity and the pseudogap in the underdoped high-T_c cuprate YBa₂Cu₄O₈ (T_c = 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 T_c 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 language	English
Pages (from-to)	901-903
Number of pages	3
Journal	Physica B: Condensed Matter
Volume	281-282
DOIs	https://doi.org/10.1016/S0921-4526(99)01161-8
Publication status	Published - Jun 1 2000
Externally published	Yes
Event	Yamada Conference LI - The International Conference on Strongly Correlated Electron Systems (SCES '99) - Nagano, Jpn Duration: Aug 24 1999 → Aug 28 1999

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics
Electrical and Electronic Engineering

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title = "d-Wave vortex and pseudogap in underdoped high-Tc cuprate YBa2Cu4O8: High-magnetic-field NMR",

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.",

author = "Zheng, {Guo Qing} and Clark, {W. G.} and Y. Kitaoka and K. Asayama and Y. Kodama and P. Kuhns and Moulton, {W. G.}",

year = "2000",

month = jun,

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doi = "10.1016/S0921-4526(99)01161-8",

language = "English",

volume = "281-282",

pages = "901--903",

journal = "Physica B: Condensed Matter",

issn = "0921-4526",

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note = "Yamada Conference LI - The International Conference on Strongly Correlated Electron Systems (SCES '99) ; Conference date: 24-08-1999 Through 28-08-1999",

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TY - JOUR

T1 - d-Wave vortex and pseudogap in underdoped high-Tc cuprate YBa2Cu4O8

T2 - Yamada Conference LI - The International Conference on Strongly Correlated Electron Systems (SCES '99)

AU - Zheng, Guo Qing

AU - Clark, W. G.

AU - Kitaoka, Y.

AU - Asayama, K.

AU - Kodama, Y.

AU - Kuhns, P.

AU - Moulton, W. G.

PY - 2000/6/1

Y1 - 2000/6/1

N2 - 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.

AB - 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.

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U2 - 10.1016/S0921-4526(99)01161-8

DO - 10.1016/S0921-4526(99)01161-8

M3 - Conference article

AN - SCOPUS:0033890467

VL - 281-282

SP - 901

EP - 903

JO - Physica B: Condensed Matter

JF - Physica B: Condensed Matter

SN - 0921-4526

Y2 - 24 August 1999 through 28 August 1999

ER -