Superconductivity-Induced Anomalies in the Spin Excitation Spectra of Underdoped YBa{sub 2}Cu{sub 3}O{sub 6+{ital x}}

Journal Article · Wed Jan 01 04:00:00 EST 1997 · Physical Review Letters

DOI:https://doi.org/10.1103/PhysRevLett.78.713· OSTI ID:474649

Fong, H; Keimer, B ^[1]; Milius, D; Aksay, I ^[2]

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1. Department of Physics, Princeton University, Princeton, New Jersey 08544 (United States)
2. Department of Chemical Engineering, Princeton University, Princeton, New Jersey 08544 (United States)

Polarized and unpolarized neutron scattering have been used to determine the effect of superconductivity on the magnetic excitation spectra of YBa{sub 2}Cu{sub 3}O{sub 6.5} (T{sub c}=52K) and YBa{sub 2}Cu{sub 3}O{sub 6.7} (T{sub c}=67K). Pronounced enhancements of the spectral weight centered around 25 and 33meV, respectively, are observed below T{sub c} in both crystals, compensated predominantly by a loss of spectral weight at {bold {ital higher}} energies. The data provide important clues to the origin of the 40meV magnetic resonance peak in YBa{sub 2}Cu{sub 3}O{sub 7}. {copyright} {ital 1997} {ital The American Physical Society}

• Research Organization: Brookhaven National Laboratory
• DOE Contract Number: AC02-76CH00016
• OSTI ID: 474649
• Journal Information: Physical Review Letters, Journal Name: Physical Review Letters Journal Issue: 4 Vol. 78; ISSN 0031-9007; ISSN PRLTAO
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
BARIUM OXIDES
BNL
COPPER OXIDES
EXCITATION
HIGH-TC SUPERCONDUCTORS
MAGNETIC RESONANCE
MAGNETIC SUSCEPTIBILITY
NEUTRON DIFFRACTION
SPIN
YTTRIUM OXIDES