Evidence of Magnon-Mediated Orbital Magnetism in a Quasi-2D Topological Magnon Insulator

Alahmed, Laith1; Zhang, Xiaoqian2; Wen, Jiajia2; Xiong, Yuzan3; Li, Yi8; Zhang, Li-chuan4,5,6; Lux, Fabian7; Freimuth, Frank4,5,6,7; Mahdi, Muntasir1; Mokrousov, Yuriy4,5,6,7; Novosad, Valentine8; Kwok, Wai-Kwong8; Yu, Dapeng2; Zhang, Wei11,12; Li, Peng1; Lee, Young S.9,10

2022-06-01

10.1021/acs.nanolett.2c00562

NANO LETTERS   Impact Factor & Quartile

1530-6984

1530-6992

We explore spin dynamics in Cu(1,3-bdc), a quasi-2D topological magnon insulator. The results show that the thermal evolution of the Lande g factor (g) is anisotropic: gin-plane decreases while g(out-of-plane) increases with increasing temperature T. Moreover, the anisotropy of the g factor (Delta g) and the anisotropy of saturation magnetization (Delta M-s) are correlated below 4 K, but they diverge above 4 K. We show that the electronic orbital moment contributes to the g anisotropy at lower T, while the topological orbital moment induced by thermally excited spin chirality dictates the g anisotropy at higher T. Our work suggests an interplay among topology, spin chirality, and orbital magnetism in Cu(1,3-bdc).

topological orbital moment topological magnon insulator kagome magnet magnon excitation g factor anisotropy

SCI ; EI

English

NI Journal Papers

Corresponding

U.S. National Science Foundation (NSF)["ECCS-1933301","ECCS-1941426"] ; Deutsche Forschungsgemeinschaft (DFG, German Research Foundation)["TRR 173-268565370","TRR 288-422213477"] ; U.S. Department of Energy (DOE), Office of Science, Basic Energy Sciences, Materials Sciences and Engineering Division[DE-AC0276SF00515] ; China Postdoctoral Science Foundation[2021M701590] ; U.S. NSF EPM[DMR-2129879] ; National Science Foundation Major Research Instrumentation program[NSF-DMR-2018794] ; U.S. DOE, Office of Science, Basic Energy Sciences, Materials Sciences and Engineering Division[DE-SC0022060]

Chemistry ; Science & Technology - Other Topics ; Materials Science ; Physics

Chemistry, Multidisciplinary ; Chemistry, Physical ; Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary ; Physics, Applied ; Physics, Condensed Matter

WOS:000820382100001

AMER CHEMICAL SOC

20223112521365

Chirality ; Saturation magnetization ; Spin dynamics ; Topology

Magnetism: Basic Concepts and Phenomena:701.2 ; Combinatorial Mathematics, Includes Graph Theory, Set Theory:921.4 ; Physical Properties of Gases, Liquids and Solids:931.2 ; Atomic and Molecular Physics:931.3

MATERIALS SCIENCE

Web of Science

1.Auburn Univ, Dept Elect & Comp Engn, Auburn, AL 36849 USA
2.Southern Univ Sci & Technol, Shenzhen Inst Quantum Sci & Engn, Shenzhen 518055, Peoples R China
3.Oakland Univ, Dept Elect & Comp Engn, Rochester, MI 48309 USA
4.Forschungszentrum Julich, Peter Grunberg Inst, D-52425 Julich, Germany
5.Forschungszentrum Julich, Inst Adv Simulat, D-52425 Julich, Germany
6.JARA, D-52425 Julich, Germany
7.Johannes Gutenberg Univ Mainz, Inst Phys, D-55099 Mainz, Germany
8.Argonne Natl Lab, Mat Sci Div, Lemont, IL 60439 USA
9.SLAC Natl Accelerator Lab, Stanford Inst Mat & Energy Sci, Menlo Pk, CA 94025 USA
10.Stanford Univ, Dept Appl Phys, Stanford, CA 94305 USA
11.Univ N Carolina, Dept Phys & Astron, Chapel Hill, NC 27599 USA
12.Oakland Univ, Dept Phys, Rochester, MI 48309 USA

Alahmed, Laith,Zhang, Xiaoqian,Wen, Jiajia,et al. Evidence of Magnon-Mediated Orbital Magnetism in a Quasi-2D Topological Magnon Insulator[J]. NANO LETTERS,2022,22:5114-5119.

Alahmed, Laith.,Zhang, Xiaoqian.,Wen, Jiajia.,Xiong, Yuzan.,Li, Yi.,...&Lee, Young S..(2022).Evidence of Magnon-Mediated Orbital Magnetism in a Quasi-2D Topological Magnon Insulator.NANO LETTERS,22,5114-5119.

Alahmed, Laith,et al."Evidence of Magnon-Mediated Orbital Magnetism in a Quasi-2D Topological Magnon Insulator".NANO LETTERS 22(2022):5114-5119.