Resonant spin excitation in an overdoped high temperature superconductor

H He; Y Sidis; P Bourges; G D Gu; A Ivanov; N Koshizuka; B Liang; C T Lin; L P Regnault; E Schoenherr; B Keimer

doi:10.1103/PhysRevLett.86.1610

Resonant spin excitation in an overdoped high temperature superconductor

Phys Rev Lett. 2001 Feb 19;86(8):1610-3. doi: 10.1103/PhysRevLett.86.1610.

Authors

H He¹, Y Sidis, P Bourges, G D Gu, A Ivanov, N Koshizuka, B Liang, C T Lin, L P Regnault, E Schoenherr, B Keimer

Affiliation

¹ Max-Planck-Institut für Festkörperforschung, Stuttgart, Germany.

PMID: 11290205
DOI: 10.1103/PhysRevLett.86.1610

Abstract

An inelastic neutron scattering study of overdoped Bi(2)Sr(2)CaCu(2)O(8+delta) ( T(c) = 83 K) has revealed a resonant spin excitation in the superconducting state. The mode energy is E(res) = 38.0 meV, significantly lower than in optimally doped Bi(2)Sr(2)CaCu(2)O(8+delta) ( T(c) = 91 K, E(res) = 42.4 meV). This observation, which indicates a constant ratio E(res)/k(B)T(c) approximately 5.4, helps resolve a long-standing controversy about the origin of the resonant spin excitation in high temperature superconductors.