Magnetic order and ballistic spin transport in a sine-Gordon spin chain

Huddart, B.M.; Gomilšek, M.; Hicken, T.J.; Pratt, F.L.; Blundell, S.J.; Goddard, P.A.; Kaech, S.J.; Manson, J.L.; Lancaster, T.

doi:10.1103/physrevb.103.l060405

Magnetic order and ballistic spin transport in a sine-Gordon spin chain

Huddart, B.M.; Gomilšek, M.; Hicken, T.J.; Pratt, F.L.; Blundell, S.J.; Goddard, P.A.; Kaech, S.J.; Manson, J.L.; Lancaster, T.

Authors

Benjamin Huddart benjamin.m.huddart@durham.ac.uk
Academic Visitor

M. Gomilšek

Thomas James Hicken thomas.j.hicken@durham.ac.uk
PGR Student Doctor of Philosophy

F.L. Pratt

S.J. Blundell

P.A. Goddard

S.J. Kaech

J.L. Manson

Professor Tom Lancaster tom.lancaster@durham.ac.uk
Professor

Abstract

We report the results of muon-spin spectroscopy (μ+SR) measurements on the staggered molecular spin chain [pym-Cu(NO3 )2(H2O)2] (pym = pyrimidine), a material previously described using sine-Gordon field theory. Zero-field μ+SR reveals a long range magnetically ordered ground state below a transition temperature TN = 0.23(1) K. Using longitudinal-field (LF) μ+SR we investigate the dynamic response in applied magnetic fields 0 < B < 500 mT and find evidence for ballistic spin transport. Our LF μ+SR measurements on the chiral spin chain [Cu(pym)(H2O)4]SiF6 · H2O instead demonstrate one-dimensional spin diffusion, and the distinct spin transport in these two systems suggests that additional anisotropic interactions play an important role in determining the nature of spin transport in S = 1/2 antiferromagnetic chains.

Citation

Huddart, B., Gomilšek, M., Hicken, T., Pratt, F., Blundell, S., Goddard, P., …Lancaster, T. (2021). Magnetic order and ballistic spin transport in a sine-Gordon spin chain. Physical Review B, 103(6), Article L060405. https://doi.org/10.1103/physrevb.103.l060405

Journal Article Type	Article
Acceptance Date	Jan 25, 2021
Online Publication Date	Feb 15, 2021
Publication Date	Feb 1, 2021
Deposit Date	Feb 16, 2021
Publicly Available Date	Oct 26, 2021
Journal	Physical Review B
Print ISSN	2469-9950
Electronic ISSN	2469-9969
Publisher	American Physical Society
Peer Reviewed	Peer Reviewed
Volume	103
Issue	6
Article Number	L060405
DOI	https://doi.org/10.1103/physrevb.103.l060405