Journal
NANO LETTERS
Volume 21, Issue 16, Pages 6938-6945Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acs.nanolett.1c02188
Keywords
2D materials; 2D magnet; antiferromagnet; iron phosphorus trisulfide
Categories
Funding
- Department of Energy, Basic Energy Sciences, Materials Sciences and Engineering Division [DE-SC0012509]
- NSF MRSEC [1719797]
- State of Washington
- National Science Foundation [ACI-1548562]
- NSF at the Pittsburgh Supercomputing Center (PSC) [ACI-1928147]
- Division Of Materials Research
- Direct For Mathematical & Physical Scien [1719797] Funding Source: National Science Foundation
Ask authors/readers for more resources
This study reports optical linear dichroism induced by zigzag antiferromagnetism in FePS3, which is at least an order of magnitude larger than those reported in other antiferromagnetic systems, despite having the optical wave vector parallel to the Neel vector. This large optical anisotropy enables the probe of 60 degrees orientated zigzag-AFM domains.
Direct optical probing of the antiferromagnetic order parameter in atomically thin samples is challenging, for example, via magneto-optical spectroscopy, due to the lack of net magnetization. Here, we report zigzag-antiferromagnetism (AFM) induced optical linear dichroism (LD) in layered transition-metal thiophosphate FePS3 down to the monolayer limit. The observed LD is giant despite having the optical wave vector parallel to the Neel vector. The LD is at least one order of magnitude larger than those reported in other antiferromagnetic systems, where the optical wave vector is orthogonal to the Neel vector. The large LD enables the probe of 60 degrees orientated zigzag-AFM domains. The optical anisotropy in FePS3 originates from an electronic anisotropy associated with the zigzag direction of the AFM order and is independent of the spin-pointing direction. Our findings point to a new optical approach for the investigation and control of zigzag or stripe magnetic order in strongly correlated systems.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available