Published November 12, 2021
| Submitted + Supplemental Material + Published
Journal Article
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Direct Observation of Collective Electronuclear Modes about a Quantum Critical Point
Abstract
We directly measure the low energy excitation modes of the quantum Ising magnet LiHoF₄ using microwave spectroscopy. Instead of a single electronic mode, we find a set of collective electronuclear modes, in which the spin-1/2 Ising electronic spins hybridize with the bath of spin-7/2 Ho nuclear spins. The lowest-lying electronuclear mode softens at the approach to the quantum critical point, even in the presence of disorder. This softening is rapidly quenched by a longitudinal magnetic field. Similar electronuclear structures should exist in other spin-based quantum Ising systems.
Additional Information
© 2021 American Physical Society. Received 12 January 2021; revised 12 July 2021; accepted 13 October 2021; published 12 November 2021. The experimental work at Caltech was supported by the U.S. Department of Energy Basic Energy Sciences Award No. DE-SC0014866. P. C. E. S. acknowledges support at Caltech from Simons Foundation Grant No. 568762 and National Science Foundation Grant No. PHY-1733907. Theoretical work at UBC was supported by the National Sciences and Engineering Research Council of Canada, No. RGPIN-2019-05582.Attached Files
Published - PhysRevLett.127.207202.pdf
Submitted - 2101.05143.pdf
Supplemental Material - 21.09.02_LiHo-PRL-suppInfo.pdf
Files
21.09.02_LiHo-PRL-suppInfo.pdf
Additional details
- Alternative title
- Direct Measurement of the Soft Mode Driving a Quantum Phase Transition
- Eprint ID
- 107858
- Resolver ID
- CaltechAUTHORS:20210202-095237849
- DE-SC0014866
- Department of Energy (DOE)
- 568762
- Simons Foundation
- PHY-1733907
- NSF
- RGPIN-2019-05582
- Natural Sciences and Engineering Research Council of Canada (NSERC)
- Created
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2021-02-03Created from EPrint's datestamp field
- Updated
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2023-06-27Created from EPrint's last_modified field