Low-frequency structural dynamics in the incommensurate composite crystal Bi2Sr2CuO6 + δ

Inelastic coherent neutron scattering experiments have been performed to study the low-frequency structural excitations in single crystals of the incommensurate superconducting Bi2Sr2CuO6 + delta (Bi-2201) system. As in the Bi-2212 family, the observation of two well-defined propagating 'acoust...

Full description

Saved in:
Bibliographic Details
Published in:Europhysics letters 2004-04, Vol.66 (2), p.246-252
Main Authors: Etrillard, J, Bourgeois, L, Bourges, P, Liang, B, Lin, C. T, Keimer, B
Format: Article
Language:English
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Inelastic coherent neutron scattering experiments have been performed to study the low-frequency structural excitations in single crystals of the incommensurate superconducting Bi2Sr2CuO6 + delta (Bi-2201) system. As in the Bi-2212 family, the observation of two well-defined propagating 'acoustic-like' branches around the main Bragg reflections reflects its composite nature. The two modes naturally correspond to the separate motions of the two sublattices. Constant-Q scans reveal a rapid evolution of the dynamical structure factor with the wave vector.
ISSN:0295-5075
1286-4854
DOI:10.1209/epl/i2003-10182-3