Heterobilayer moiré magnets: Moiré skyrmions and commensurate-incommensurate transitions

Hejazi, Kasra; Luo, Zhu-Xi; Balents, Leon

doi:10.1103/physrevb.104.l100406

Title: Heterobilayer moiré magnets: Moiré skyrmions and commensurate-incommensurate transitions

Journal Article · 09 September 2021 · Physical Review. B

DOI: https://doi.org/10.1103/physrevb.104.l100406 · OSTI ID:1849882

^[1];

^[2]; Balents, Leon ^[3]

Univ. of California, Santa Barbara, CA (United States); OSTI
Univ. of California, Santa Barbara, CA (United States). Kavli Inst. for Theoretical Physics
Univ. of California, Santa Barbara, CA (United States). Kavli Inst. for Theoretical Physics; Canadian Inst. for Advanced Research, Toronto, ON (Canada)

In this work, we study untwisted heterobilayers of ferromagnetic and antiferromagnetic van der Waals materials, with in particular a Dzyaloshinskii-Moriya interaction in the ferromagnetic layer. A continuum low-energy field theory is utilized to study such systems. We develop a phase diagram as a function of the strength of interlayer exchange and Dzyaloshinskii-Moriya interactions, combining perturbative and strong coupling analyses with numerical simulations using Landau-Lifshitz-Gilbert equations. Various moiré-periodic commensurate phases are found, and the commensurate-incommensurate transition is discussed. Among the commensurate phases, we observe an interesting skyrmion lattice phase wherein each moiré unit-cell hosts one skyrmion.

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Research Organization:: Univ. of California, Santa Barbara, CA (United States)

Sponsoring Organization:: Simons Foundation; USDOE Office of Science (SC), Basic Energy Sciences (BES)

Grant/Contract Number:: FG02-08ER46524

OSTI ID:: 1849882

Journal Information:: Physical Review. B, Journal Name: Physical Review. B Journal Issue: 10 Vol. 104; ISSN 2469-9950; ISSN PRBMDO

Publisher:: American Physical Society (APS)Copyright Statement

Country of Publication:: United States

Language:: English

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