Ballistic magnon heat conduction and possible Poiseuille flow in the helimagnetic insulator Cu2OSeO3
Journal Article
·
· Physical Review B
- Univ. of Miami, Coral Gables, FL (United States)
- Johns Hopkins Univ., Baltimore, MD (United States)
Herein we report on the observation of magnon thermal conductivity W/mK near 5 K in the helimagnetic insulator , exceeding that measured in any other ferromagnet by almost two orders of magnitude. Ballistic, boundary-limited transport for both magnons and phonons is established below 1 K, and Poiseuille flow of magnons is proposed to explain a magnon mean-free path substantially exceeding the specimen width for the least defective specimens in the range K. These observations establish as a model system for studying long-wavelength magnon dynamics.
- Research Organization:
- Univ. of Miami, Coral Gables, FL (United States); Johns Hopkins Univ., Baltimore, MD (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC), Basic Energy Sciences (BES)
- Grant/Contract Number:
- SC0008607; FG02-08ER46544
- OSTI ID:
- 1657463
- Alternate ID(s):
- OSTI ID: 1361444
- Journal Information:
- Physical Review B, Vol. 95, Issue 22; ISSN 2469-9950
- Publisher:
- American Physical Society (APS)Copyright Statement
- Country of Publication:
- United States
- Language:
- English
Cited by: 24 works
Citation information provided by
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Web of Science
Magnonic topological insulators in antiferromagnets
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text | January 2017 |
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