Magnetic excitations of the charge stripe electrons below half doping in La(2-x)Sr(x)NiO4, x = 0.45 and x = 0.4

Freeman, P. G., Giblin, Sean ORCID: https://orcid.org/0000-0003-1876-8619, Hradil, K., Mole, R. A., Cermak, P. and Prabhakaran, D. 2017. Magnetic excitations of the charge stripe electrons below half doping in La(2-x)Sr(x)NiO4, x = 0.45 and x = 0.4. Physical Review B 95 (6) , 064403. 10.1103/PhysRevB.95.064403

Preview

PDF - Published Version Download (1MB) | Preview

Abstract

The low energy magnetic excitation spectrum of charge stripe ordered La(2-x)Sr(x)NiO4, x = 0.4 and x = 0.45 samples were studied by neutron scattering. Two excitation modes are observed in both materials, one from the ordered magnetic moments, and a second mode consistent with pseudo-one-dimensional antiferromagnetic excitations of the charge stripe electrons (q-1D). The dispersion of the q-1D excitation follows the same relation as in x = 1/3 composition, with even spectral weight in the two counter-propagating branches of the x = 0.4 sample, however in the x=0.45 sample only one dispersion branch has any measurable spectral weight. The evolution of the q-1D excitations on doping to the checkerboard charge ordered phase is discussed.

Item Type:	Article
Date Type:	Publication
Status:	Published
Schools:	Physics and Astronomy
Subjects:	Q Science > QC Physics
Publisher:	American Physical Society
ISSN:	2469-9950
Date of First Compliant Deposit:	29 March 2017
Date of Acceptance:	28 December 2016
Last Modified:	04 May 2023 04:11
URI:	https://orca.cardiff.ac.uk/id/eprint/99460

Citation Data

Cited 5 times in Scopus. View in Scopus. Powered By Scopus® Data

Actions (repository staff only)

Edit Item