Novel excitations near quantum criticality in geometrically frustrated antiferromagnet CsFeCl3
Abstract
The investigation of materials that exhibit quantum phase transition provides valuable insights into fundamental problems in physics. We present neutron scattering under pressure in a triangular-lattice antiferromagnet that has a quantum disorder in the low-pressure phase and a noncollinear structure in the high-pressure phase. The neutron spectrum continuously evolves through critical pressure; a single mode in the disordered state becomes soft with the pressure and it splits into gapless and gapped modes in the ordered phase. Extended spin-wave theory reveals that the longitudinal and transverse fluctuations of spins are hybridized in the modes because of noncollinearity, and previously unidentified magnetic excitations are formed. We report a new hybridization of the phase and amplitude fluctuations of the order parameter near a quantum critical point in a spontaneously symmetry-broken state.
- Authors:
-
[1];
[2];
[6];
[7];
[8];
[8]
- The Univ. of Tokyo, Chiba (Japan); ETH Zurich, Zurich (Switzerland)
- Shizuoka Univ., Shizuoka (Japan)
- The Univ. of Tokyo, Chiba (Japan); High Energy Accelerator Research Organization, Tsukuba (Japan)
- Tokyo Inst. of Technology, Tokyo (Japan)
- High Energy Accelerator Research Organization, Ibaraki (Japan)
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
- The Univ. of Tokyo, Chiba (Japan); RIKEN Center for Emergent Matter Science, Wako (Japan)
- The Univ. of Tokyo, Chiba (Japan)
- Publication Date:
- Research Org.:
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), Basic Energy Sciences (BES)
- OSTI Identifier:
- 1571849
- Grant/Contract Number:
- AC05-00OR22725
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Science Advances
- Additional Journal Information:
- Journal Volume: 5; Journal Issue: 10; Journal ID: ISSN 2375-2548
- Publisher:
- AAAS
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY
Citation Formats
Hayashida, Shohei, Matsumoto, Masashige, Hagihala, Masato, Kurita, Nobuyuki, Tanaka, Hidekazu, Itoh, Shinichi, Hong, Tao, Soda, Minoru, Uwatoko, Yoshiya, and Masuda, Takatsugu. Novel excitations near quantum criticality in geometrically frustrated antiferromagnet CsFeCl3. United States: N. p., 2019.
Web. doi:10.1126/sciadv.aaw5639.
Hayashida, Shohei, Matsumoto, Masashige, Hagihala, Masato, Kurita, Nobuyuki, Tanaka, Hidekazu, Itoh, Shinichi, Hong, Tao, Soda, Minoru, Uwatoko, Yoshiya, & Masuda, Takatsugu. Novel excitations near quantum criticality in geometrically frustrated antiferromagnet CsFeCl3. United States. https://doi.org/10.1126/sciadv.aaw5639
Hayashida, Shohei, Matsumoto, Masashige, Hagihala, Masato, Kurita, Nobuyuki, Tanaka, Hidekazu, Itoh, Shinichi, Hong, Tao, Soda, Minoru, Uwatoko, Yoshiya, and Masuda, Takatsugu. Fri .
"Novel excitations near quantum criticality in geometrically frustrated antiferromagnet CsFeCl3". United States. https://doi.org/10.1126/sciadv.aaw5639. https://www.osti.gov/servlets/purl/1571849.
@article{osti_1571849,
title = {Novel excitations near quantum criticality in geometrically frustrated antiferromagnet CsFeCl3},
author = {Hayashida, Shohei and Matsumoto, Masashige and Hagihala, Masato and Kurita, Nobuyuki and Tanaka, Hidekazu and Itoh, Shinichi and Hong, Tao and Soda, Minoru and Uwatoko, Yoshiya and Masuda, Takatsugu},
abstractNote = {The investigation of materials that exhibit quantum phase transition provides valuable insights into fundamental problems in physics. We present neutron scattering under pressure in a triangular-lattice antiferromagnet that has a quantum disorder in the low-pressure phase and a noncollinear structure in the high-pressure phase. The neutron spectrum continuously evolves through critical pressure; a single mode in the disordered state becomes soft with the pressure and it splits into gapless and gapped modes in the ordered phase. Extended spin-wave theory reveals that the longitudinal and transverse fluctuations of spins are hybridized in the modes because of noncollinearity, and previously unidentified magnetic excitations are formed. We report a new hybridization of the phase and amplitude fluctuations of the order parameter near a quantum critical point in a spontaneously symmetry-broken state.},
doi = {10.1126/sciadv.aaw5639},
journal = {Science Advances},
number = 10,
volume = 5,
place = {United States},
year = {2019},
month = {10}
}
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Works referencing / citing this record:
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