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Evidence of itinerant holes for long-range magnetic order in the tungsten diselenide semiconductor with vanadium dopants

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Title
Evidence of itinerant holes for long-range magnetic order in the tungsten diselenide semiconductor with vanadium dopants
Author(s)
Bumsub Song; Seok Joon Yun; Jinbao Jiang; José Avila; Kory Beach; Wooseon Choi; Young-Min Kim; Duhee Yoon; Humberto Terrones; Young Jae Song; Maria C. Asensio; Dinh Loc Duong; Young Hee Lee
Publication Date
2021-03
Journal
Physical Review B, v.103, no.9, pp.094432-1 - 094432-7
Publisher
American Physical Society
Abstract
© 2021 American Physical Society.One primary concern in diluted magnetic semiconductors (DMSs) is how to establish a long-range magnetic order with low magnetic doping concentration to maintain the gate tunability of the host semiconductor, as well as to increase Curie temperature. Several van der Waals semiconductors have been investigated recently to demonstrate the magnetic order in DMSs. Nonetheless, a comprehensive understanding of the operative mechanism has remained elusive. Here, we demonstrate concrete evidence of the long-range magnetic order through itinerant spin-polarized holes in a monolayer V-doped WSe2 semiconductor. Hybridization between V impurity states and the host valence band has been investigated using scanning tunneling microscopy. Transport characteristics reveal the itinerant holes within the hybridized band and hysteresis in magnetoresistance; this clearly resembles the Zener-type description of the itinerant ferromagnetism as predicted by density functional theory calculations.
URI
https://pr.ibs.re.kr/handle/8788114/9526
DOI
10.1103/PhysRevB.103.094432
ISSN
2469-9950
Appears in Collections:
Center for Integrated Nanostructure Physics(나노구조물리 연구단) > 1. Journal Papers (저널논문)
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