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Observation of plateau-like magnetoresistance in twisted Fe3GeTe2/Fe3GeTe2 junction

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Title
Observation of plateau-like magnetoresistance in twisted Fe3GeTe2/Fe3GeTe2 junction
Author(s)
Junghyun Kim; Suhan Son; Matthew J. Coak; Inho Hwang; Youjin Lee; Kaixuan Zhang; Je-Geun Park
Subject
WAALS, ; FERROMAGNETISM, ; CRYSTAL
Publication Date
2020-09
Journal
JOURNAL OF APPLIED PHYSICS, v.128, no.9, pp.093901
Publisher
AMER INST PHYSICS
Abstract
© 2020 Author(s). Controlling the stacking of van der Waals (vdW) materials is found to produce exciting new findings, since hetero- or homo-structures have added the diverse possibility of assembly and manipulated functionalities. However, so far, the homostructure with a twisted angle based on the magnetic vdW materials remains unexplored. Here, we achieved a twisted magnetic vdW Fe3GeTe2 (FGT)/Fe3GeTe2 junction with broken crystalline symmetry. A clean and metallic vdW junction is evidenced by the temperature-dependent resistance and the linear I-V curve. Unlike the pristine FGT, a plateau-like magnetoresistance (PMR) is observed in the magnetotransport of our homojunction due to the antiparallel magnetic configurations of the two FGT layers. The PMR ratio is found to be similar to 0.05% and gets monotonically enhanced as temperature decreases like a metallic giant magnetoresistance. Such a tiny PMR ratio is at least three orders of magnitude smaller than the tunneling magnetoresistance ratio, justifying our clean metallic junction without a spacer. Our findings demonstrate the feasibility of the controllable homostructure and shed light on future spintronics using magnetic vdW materials. Published under license by AIP Publishing
URI
https://pr.ibs.re.kr/handle/8788114/7642
DOI
10.1063/5.0012305
ISSN
0021-8979
Appears in Collections:
Center for Correlated Electron Systems(강상관계 물질 연구단) > 1. Journal Papers (저널논문)
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