M. Gomilšek
Field-Induced Instability of a Gapless Spin Liquid with a Spinon Fermi Surface
Gomilšek, M.; Klanjšek, M.; Žitko, R.; Pregelj, M.; Bert, F.; Mendels, P.; Li, Y.; Zhang, Q. M.; Zorko, A.
Authors
M. Klanjšek
R. Žitko
M. Pregelj
F. Bert
P. Mendels
Y. Li
Q. M. Zhang
A. Zorko
Abstract
The ground state of the quantum kagome antiferromagnet Zn-brochantite, ZnCu3ðOHÞ6SO4, which is one of only a few known spin-liquid (SL) realizations in two or three dimensions, has been described as a gapless SL with a spinon Fermi surface. Employing nuclear magnetic resonance in a broad magnetic-field range down to millikelvin temperatures, we show that in applied magnetic fields this enigmatic state is intrinsically unstable against a SL with a full or a partial gap. A similar instability of the gapless Fermisurface SL was previously encountered in an organic triangular-lattice antiferromagnet, suggesting a common destabilization mechanism that most likely arises from spinon pairing. A salient property of this instability is that an infinitesimal field suffices to induce it, as predicted theoretically for some other types of gapless SLs.
Citation
Gomilšek, M., Klanjšek, M., Žitko, R., Pregelj, M., Bert, F., Mendels, P., …Zorko, A. (2017). Field-Induced Instability of a Gapless Spin Liquid with a Spinon Fermi Surface. Physical Review Letters, 119(13), Article 137205. https://doi.org/10.1103/physrevlett.119.137205
Journal Article Type | Article |
---|---|
Acceptance Date | May 17, 2017 |
Online Publication Date | Sep 29, 2017 |
Publication Date | Sep 29, 2017 |
Deposit Date | May 11, 2018 |
Publicly Available Date | Jan 3, 2024 |
Journal | Physical Review Letters |
Print ISSN | 0031-9007 |
Electronic ISSN | 1079-7114 |
Publisher | American Physical Society |
Peer Reviewed | Peer Reviewed |
Volume | 119 |
Issue | 13 |
Article Number | 137205 |
DOI | https://doi.org/10.1103/physrevlett.119.137205 |
Public URL | https://durham-repository.worktribe.com/output/1326884 |
Related Public URLs | https://arxiv.org/abs/1709.02084 |
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