Angularly quantized spin rotations in hexagonal LuMnO3

Kim, Seung; Nam, Jiyeon; Xu, Xianghan; Cheong, Sang-Wook; Yang, In-Sang

doi:10.1038/s41598-022-06394-2

Title: Angularly quantized spin rotations in hexagonal LuMnO₃

Journal Article · 14 February 2022 · Scientific Reports

DOI: https://doi.org/10.1038/s41598-022-06394-2 · OSTI ID:1904638

Kim, Seung ^[1]; Nam, Jiyeon ^[2]; Xu, Xianghan ^[3]; Cheong, Sang-Wook ^[3]; Yang, In-Sang ^[2]

Ewha Womans University, Seoul (Korea, Republic of); Ewha Womans Univ., Seoul (Korea, Republic of)
Ewha Womans University, Seoul (Korea, Republic of)
Rutgers University, Piscataway, NJ (United States)

Optical control of the spin degree of freedom is often desired in application of the spin technology. Here we report spin-rotational excitations observed through inelastic light scattering of the hexagonal LuMnO₃ in the antiferromagnetically (AFM) ordered state. We propose a model based on the spin–spin interaction Hamiltonian associated with the spin rotation of the Mn ions, and find that the spin rotations are angularly quantized by 60°, 120°, and 180°. Angular quantization is considered to be a consequence of the symmetry of the triangular lattice of the Mn-ion plane in the hexagonal LuMnO₃. These angularly-quantized spin excitations may be pictured as isolated flat bubbles in the sea of the ground state, which may lead to high-density information storage if applied to spin devices. Optically pumped and detected spin-excitation bubbles would bring about the advanced technology of optical control of the spin degree of freedom in multiferroic materials.

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Research Organization:: Rutgers University, Piscataway, NJ (United States)

Sponsoring Organization:: USDOE Office of Science (SC); Ministry of Education, Korea; National Research Foundation of Korea (NRF)

Grant/Contract Number:: FG02-07ER46382

OSTI ID:: 1904638

Journal Information:: Scientific Reports, Journal Name: Scientific Reports Journal Issue: 1 Vol. 12; ISSN 2045-2322

Publisher:: Nature Publishing GroupCopyright Statement

Country of Publication:: United States

Language:: English

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Title: Angularly quantized spin rotations in hexagonal LuMnO3

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Title: Angularly quantized spin rotations in hexagonal LuMnO₃