Superconductivity-Induced Anomalies in the Spin Excitation Spectra of Underdoped YBa_2 Cu_3 O_{6+x}

Preprint

11 December 1996

preprint
Published by arXiv in arXiv

https://doi.org/10.48550/arXiv.cond-mat/9612110

Abstract

Polarized and unpolarized neutron scattering has been used to determine the effect of superconductivity on the magnetic excitation spectra of YBa_2 Cu_3 O_{6.5} (T_c = 52K) and YBa_2 Cu_3 O_{6.7} (T_c = 67K). Pronounced enhancements of the spectral weight centered around 25 meV and 33 meV, respectively, are observed below T_c in both crystals, compensated predominantly by a loss of spectral weight at higher energies. The data provide important clues to the origin of the 40 meV magnetic resonance peak in YBa_2 Cu_3 O_7.

Keywords

SUPERCONDUCTIVITY INDUCED
EXCITATION SPECTRA
INDUCED ANOMALIES
SPIN EXCITATION
YBA_2 CU_3
POLARIZED
T_C

All Related Versions

Version 1, 1996-12-11, ArXiv
Published version: Physical Review Letters, 78 (4), 713.

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