Son, Suhan, Coak, Matthew J., Lee, Nahyun, Kim, Jonghyeon, Kim, Tae Yun, Hamidov, Hayrullo ORCID: 0000-0003-3236-8048, Cho, Hwanbeom, Liu, Cheng, Jarvis, David M., Brown, Philip A. C., Kim, Jae Hoon, Park, Cheol-Hwan ORCID: 0000-0003-1584-6896, Khomskii, Daniel, I, Saxena, Siddharth S. and Park, Je-Geun (2019). Bulk properties of the van der Waals hard ferromagnet VI3. Phys. Rev. B, 99 (4). COLLEGE PK: AMER PHYSICAL SOC. ISSN 2469-9969

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Abstract

We present comprehensive measurements of the structural, magnetic, and electronic properties of layered van der Waals ferromagnet VI3 down to low temperatures. Despite belonging to a well-studied family of transitionmetal trihalides, this material has received very little attention. We outline, from high-resolution powder x-ray diffraction measurements, a corrected room-temperature crystal structure to that previously proposed and uncover a structural transition at 79 K, also seen in the heat capacity. Magnetization measurements confirm VI(3 )to be a hard ferromagnet (9.1 kOe coercive field at 2 K) with a high degree of anisotropy, and the pressure dependence of the magnetic properties provide evidence for the two-dimensional nature of the magnetic order. Optical and electrical transport measurements show this material to be an insulator with an optical band gap of 0.67 eV-the previous theoretical predictions of d-band metallicity then lead us to believe VI3 to be a correlated Mott insulator. Our latest band-structure calculations support this picture and show good agreement with the experimental data. We suggest VI3 to host great potential in the thriving field of low-dimensional magnetism and functional materials, together with opportunities to study and make use of low-dimensional Mott physics.

Item Type: Journal Article
Creators:
CreatorsEmailORCIDORCID Put Code
Son, SuhanUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Coak, Matthew J.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Lee, NahyunUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Kim, JonghyeonUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Kim, Tae YunUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Hamidov, HayrulloUNSPECIFIEDorcid.org/0000-0003-3236-8048UNSPECIFIED
Cho, HwanbeomUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Liu, ChengUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Jarvis, David M.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Brown, Philip A. C.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Kim, Jae HoonUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Park, Cheol-HwanUNSPECIFIEDorcid.org/0000-0003-1584-6896UNSPECIFIED
Khomskii, Daniel, IUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Saxena, Siddharth S.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Park, Je-GeunUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
URN: urn:nbn:de:hbz:38-159481
DOI: 10.1103/PhysRevB.99.041402
Journal or Publication Title: Phys. Rev. B
Volume: 99
Number: 4
Date: 2019
Publisher: AMER PHYSICAL SOC
Place of Publication: COLLEGE PK
ISSN: 2469-9969
Language: English
Faculty: Unspecified
Divisions: Unspecified
Subjects: no entry
Uncontrolled Keywords:
KeywordsLanguage
INTRINSIC FERROMAGNETISM; CRYSTAL-STRUCTURE; VANADIUM IODIDES; MAGNETISM; TRANSITIONMultiple languages
Materials Science, Multidisciplinary; Physics, Applied; Physics, Condensed MatterMultiple languages
Refereed: Yes
URI: http://kups.ub.uni-koeln.de/id/eprint/15948

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