Resonant spin excitation in an overdoped high temperature superconductor

Authors
He, H Sidis, Y Bourges, P Gu, GD Ivanov, A Koshizuka, N Liang, B Lin, CT Regnault, LP Schoenherr, E Keimer, B
Citation
H. He et al., Resonant spin excitation in an overdoped high temperature superconductor, PHYS REV L, 86(8), 2001, pp. 1610-1613
Citations number
36
Categorie Soggetti
Physics
Journal title
PHYSICAL REVIEW LETTERS
ISSN journal
00319007 → ACNP
Volume
86
Issue
8
Year of publication
2001
Pages
1610 - 1613
Database
ISI
SICI code
0031-9007(20010219)86:8<1610:RSEIAO>2.0.ZU;2-C
Abstract
An inelastic neutron scattering study of overdoped Bi2Sr2CaCu2O8+delta (T-c = 83 K) has revealed a. resonant spin excitation in the superconducting st ate. The mode energy is E-res = 38.0 meV, significantly lower than in optim ally doped Bi2Sr2CaCu2O8+delta (T-c = 91 K, E-res = 42.4 meV. This observat ion. which indicates a constant ratio E-res/k(B)T(c) similar to 5.4, helps resolve a long-standing controversy about the origin of the resonant spin e xcitation in high temperature superconductors.