Spin Dynamics in High-T_c Superconductor YBa₂Cu₃O_6.9

Article type: Research Article

Authors: Yokoo, T. | Arai, M. | Frost, C.D. | Endoh, Y. | Egami, T. | Shiohara, Y. | Tajima, S.

Affiliations: Institute of Materials Structure Science, KEK, Oho 1-1, Tsukuba, Ibaraki 305-0801, Japan | ISIS, Rutherford Appleton Laboratory, Chilton, Didcot, Oxon OX11 0QX, UK | IMR, Tohoku University, Katahira 2-1-1, Aoba, Sendai, Miyagi 980-8577, Japan | Physics and Astronomy, University of Tennessee, 218 South College, Knoxville, TN 37996-1508, USA | SRL, ISTEC, Shinonome 1-10-13, Koutou, Tokyo 135-0062, Japan

Note: [] Corresponding author. Tel.: +81-29-864-5628. E-mail: [email protected]

Abstract: Dynamical structures in the vicinity of Q = (π, π) of optimally-doped YBa2Cu3O6.9 were measured by means of an inelastic neutron scattering technique utilizing pulsed neutron source. Obtained incommensurability δ of energy transfer at E = 36 meV was found to be ∼0.1 [rlu] which is not the value to be expected from the formation of spin-charge stripes. In higher energy above resonance energy (42 meV), a ring structure centered at (π, π) was observed up to 54 meV. Combined with the low energy part of the dynamical structure, the obtained results provide a total picture of the dynamical aspects in the high-Tc superconductor YBa2Cu3O6.9.

Keywords: High-Tc superconductor, Phonon dynamics, Neutron scattering, YBCO, Superconductivity, Dynamical structure

DOI: 10.1080/10238160412331299429

Journal: Journal of Neutron Research, vol. 12, no. 4, pp. 273-278, 2004