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Title: Transition Metal Dichalcogenides: Making Atomic‐Level Magnetism Tunable with Light at Room Temperature

Journal Article · · Advanced Science
 [1];  [2];  [3];  [3];  [2];  [2];  [2];  [4];  [5];  [3];  [2]; ORCiD logo [2]
  1. Department of Physics University of South Florida Tampa FL 33620 USA, Nanoscale Device Characterization Division National Institute of Standards and Technology Gaithersburg MD 20899 USA
  2. Department of Physics University of South Florida Tampa FL 33620 USA
  3. Department of Physics The Pennsylvania State University University Park PA 16802 USA
  4. Center for Computationally Assisted Science and Technology and Department of Physics North Dakota State University Fargo ND 58108 USA
  5. Department of Physics Montana State University Bozeman MT 59717 USA

Abstract The capacity to manipulate magnetization in 2D dilute magnetic semiconductors (2D‐DMSs) using light, specifically in magnetically doped transition metal dichalcogenide (TMD) monolayers ( M ‐doped TX 2 , where M  = V, Fe, and Cr; T  = W, Mo; X  = S, Se, and Te), may lead to innovative applications in spintronics, spin‐caloritronics, valleytronics, and quantum computation. This Perspective paper explores the mediation of magnetization by light under ambient conditions in 2D‐TMD DMSs and heterostructures. By combining magneto‐LC resonance (MLCR) experiments with density functional theory (DFT) calculations, we show that the magnetization can be enhanced using light in V‐doped TMD monolayers (e.g., V‐WS 2 , V‐WSe 2 ). This phenomenon is attributed to excess holes in the conduction and valence bands, and carriers trapped in magnetic doping states, mediating the magnetization of the semiconducting layer. In 2D‐TMD heterostructures (VSe 2 /WS 2 , VSe 2 /MoS 2 ), the significance of proximity, charge‐transfer, and confinement effects in amplifying light‐mediated magnetism is demonstrated. We attributed this to photon absorption at the TMD layer that generates electron–hole pairs mediating the magnetization of the heterostructure. These findings will encourage further research in the field of 2D magnetism and establish a novel design of 2D‐TMDs and heterostructures with optically tunable magnetic functionalities, paving the way for next‐generation magneto‐optic nanodevices.

Sponsoring Organization:
USDOE
Grant/Contract Number:
FG02-07ER46438
OSTI ID:
2229473
Alternate ID(s):
OSTI ID: 2472322; OSTI ID: 2229474
Journal Information:
Advanced Science, Journal Name: Advanced Science Journal Issue: 7 Vol. 11; ISSN 2198-3844
Publisher:
Wiley Blackwell (John Wiley & Sons)Copyright Statement
Country of Publication:
Germany
Language:
English

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