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
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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: | 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 |
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