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Antiferromagnetic-configuration–dependent high harmonic generation in bilayer CrI 3

Journal Article · · Europhysics Letters

Abstract

Bilayer CrI3accommodates both interlayer antiferromagnetic (AFM) and intralayer ferromagnetic couplings. Different alignments of intralayer ferromagnetic orders would lead to almost degenerate AFM configurations, which are insensitive to conventional techniques such as VSM and magneto-optical Kerr effect. Here, we demonstrate high harmonic generation (HHG) as a feasible means to detect the AFM configurations in bilayer CrI3with AB andstacking orders. When the intralayer magnetic moments are aligned along thez-axis, the AB stacked bilayer CrI3cancels the 3n-order harmonics under the circularly polarized laser field. However, thestacked bilayer contains both even and odd harmonic. The 3n-order harmonics are recovered as the intralayer magnetic moments of AB bilayer are in-plane aligned. For an in-plane linearly polarized laser field, thestacking bilayer with the magnetic moments along thex-axis contains both the even and odd harmonics in each component. However, when the magnetic moments are along they-axis, the perpendicular component of HHG cancels out for the linearly polarized laser field along thex-axis. More interestingly, when the linearly polarized laser field is along they-axis, the parallel component includes only the odd harmonics while the perpendicular component contains only the even harmonics. Our study provides HHG as a potential tool to detect AFM configurations.

Research Organization:
Indiana State Univ., Terre Haute, IN (United States)
Sponsoring Organization:
USDOE Office of Science (SC)
DOE Contract Number:
FG02-06ER46304
OSTI ID:
2419164
Journal Information:
Europhysics Letters, Journal Name: Europhysics Letters Journal Issue: 2 Vol. 140; ISSN 0295-5075
Publisher:
IOP Publishing
Country of Publication:
United States
Language:
English

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