Topological magnon bands in a room-temperature kagome magnet
Abstract
Topological magnon is a vibrant research field gaining more and more attention in the past few years. Among many theoretical proposals and limited experimental studies, ferromagnetic kagome lattice emerges as one of the most elucidating systems. Here we report neutron scattering studies of YMn6Sn6, a metallic system consisting of ferromagnetic kagome planes. This system undergoes a commensurate-to-incommensurate antiferromagnetic phase transition upon cooling with the incommensurability along the out-of-plane direction. We observe magnon band gap opening at the symmetry-protected K points and ascribe this feature to the antisymmetric Dzyaloshinskii-Moriya (DM) interactions. Our observation supports the existence of topological Dirac magnons in both the commensurate collinear and incommensurate coplanar magnetic orders, which is further corroborated by symmetry analysis. This finding places YMn6Sn6 as a promising candidate for room-temperature magnon spintronics applications.
- Authors:
-
[4];
[4];
- Michigan State Univ., East Lansing, MI (United States)
- The Ohio State Univ., Columbus, OH (United States)
- Univ. of Missouri, Columbia, MO (United States)
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
- Publication Date:
- Research Org.:
- Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), Basic Energy Sciences (BES). Scientific User Facilities Division
- OSTI Identifier:
- 1798567
- Alternate Identifier(s):
- OSTI ID: 1604849
- Grant/Contract Number:
- AC05-00OR22725
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Physical Review. B
- Additional Journal Information:
- Journal Volume: 101; Journal Issue: 10; Journal ID: ISSN 2469-9950
- Publisher:
- American Physical Society (APS)
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; Magnetic phase transitions; Spin dynamics; Topological materials; Neutron scattering
Citation Formats
Zhang, H. D., Feng, X., Heitmann, T. W., Kolesnikov, Alexander I., Stone, Matthew B., Lu, Y. -M., and Ke, X. Topological magnon bands in a room-temperature kagome magnet. United States: N. p., 2020.
Web. doi:10.1103/physrevb.101.100405.
Zhang, H. D., Feng, X., Heitmann, T. W., Kolesnikov, Alexander I., Stone, Matthew B., Lu, Y. -M., & Ke, X. Topological magnon bands in a room-temperature kagome magnet. United States. https://doi.org/10.1103/physrevb.101.100405
Zhang, H. D., Feng, X., Heitmann, T. W., Kolesnikov, Alexander I., Stone, Matthew B., Lu, Y. -M., and Ke, X. Mon .
"Topological magnon bands in a room-temperature kagome magnet". United States. https://doi.org/10.1103/physrevb.101.100405. https://www.osti.gov/servlets/purl/1798567.
@article{osti_1798567,
title = {Topological magnon bands in a room-temperature kagome magnet},
author = {Zhang, H. D. and Feng, X. and Heitmann, T. W. and Kolesnikov, Alexander I. and Stone, Matthew B. and Lu, Y. -M. and Ke, X.},
abstractNote = {Topological magnon is a vibrant research field gaining more and more attention in the past few years. Among many theoretical proposals and limited experimental studies, ferromagnetic kagome lattice emerges as one of the most elucidating systems. Here we report neutron scattering studies of YMn6Sn6, a metallic system consisting of ferromagnetic kagome planes. This system undergoes a commensurate-to-incommensurate antiferromagnetic phase transition upon cooling with the incommensurability along the out-of-plane direction. We observe magnon band gap opening at the symmetry-protected K points and ascribe this feature to the antisymmetric Dzyaloshinskii-Moriya (DM) interactions. Our observation supports the existence of topological Dirac magnons in both the commensurate collinear and incommensurate coplanar magnetic orders, which is further corroborated by symmetry analysis. This finding places YMn6Sn6 as a promising candidate for room-temperature magnon spintronics applications.},
doi = {10.1103/physrevb.101.100405},
journal = {Physical Review. B},
number = 10,
volume = 101,
place = {United States},
year = {Mon Mar 16 00:00:00 EDT 2020},
month = {Mon Mar 16 00:00:00 EDT 2020}
}
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Works referencing / citing this record:
Effects of exchange distortions in the magnetic Kagome lattice
text, January 2020
- Coker, A. A.; Saxena, A.; Haraldsen, J. T.
- arXiv
Chiral properties of the zero-field spiral state and field-induced magnetic phases of the itinerant kagome metal YMn$_6$Sn$_6$
text, January 2020
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