Field-tuned quantum effects in a triangular-lattice Ising magnet.
Sci Bull (Beijing)
; 67(1): 38-44, 2022 Jan.
Article
em En
| MEDLINE
| ID: mdl-36545957
ABSTRACT
We report thermodynamic and neutron scattering measurements of the triangular-lattice quantum Ising magnet TmMgGaO4 in longitudinal magnetic fields. Our experiments reveal a quasi-plateau state induced by quantum fluctuations. This state exhibits an unconventional non-monotonic field and temperature dependence of the magnetic order and excitation gap. In the high field regime where the quantum fluctuations are largely suppressed, we observed a disordered state with coherent magnon-like excitations despite the suppression of the spin excitation intensity. Through detailed semi-classical calculations, we are able to understand these behaviors quantitatively from the subtle competition between quantum fluctuations and frustrated Ising interactions.
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Coleções:
01-internacional
Base de dados:
MEDLINE
Idioma:
En
Revista:
Sci Bull (Beijing)
Ano de publicação:
2022
Tipo de documento:
Article
País de afiliação:
China