Pseudogap and Incommensurate Magnetic Fluctuations in YBa{sub 2}Cu{sub 3}O{sub 6.6}

Conference · Thu Jul 24 00:00:00 EDT 1997

OSTI ID:621556

Dai, P., Mook, H.A., ^[1]

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1. Oak Ridge National Lab., TN (United States), Dogan, F. [Washington Univ., Seattle, WA (United States). Dept. of Materials Science and Engineering

Unpolarized inelastic neutron scattering is used to study the temperature and wave vector dependence of the dynamical magnetic susceptibility, {xi}`` (q,{omega}), of a well characterized single crystal YBa{sub 2}Cu{sub 3}O{sub 6.6} (T{sub c} = 62.7 K). We find that a pseudogap opens in the spin fluctuation spectrum at temperatures well above T{sub c}. We speculate that the appearance of the low frequency incommensurate fluctuations is associated with the opening of the pseudogap. To within the error of the measurements, a gap in the spin fluctuation spectrum is found in the superconducting state.

• Research Organization: Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
• Sponsoring Organization: USDOE Office of Energy Research, Washington, DC (United States)
• DOE Contract Number: AC05-96OR22464
• OSTI ID: 621556
• Report Number(s): CONF-970814-13; ON: DE97008435; BR: KC0202010; CNN: Contract DE-AC05-96OR22464; TRN: AD-A332 04
• Resource Relation: Conference: International conference on neutron scattering (ICNS), Toronto (Canada), 17-21 Aug 1997; Other Information: DN: Prepared in cooperation with Washington Univ., Seattle, WA; PBD: 24 Jul 1997
• Country of Publication: United States
• Language: English

Related Subjects

66 PHYSICS
MONOCRYSTALS
CRITICAL TEMPERATURE
MAGNETIC SUSCEPTIBILITY
YTTRIUM COMPOUNDS
BARIUM COMPOUNDS
CUPRATES
INELASTIC SCATTERING
NEUTRON REACTIONS
SUPERCONDUCTORS
SPIN