Enabling room temperature ferromagnetism in monolayer MoS2 via in situ iron-doping

Fu, Shichen; Kang, Kyungnam; Shayan, Kamran; Yoshimura, Anthony; Dadras, Siamak; Wang, Xiaotian; Zhang, Lihua; Chen, Siwei; Liu, Na; Jindal, Apoorv; Li, Xiangzhi; Pasupathy, Abhay N.; Vamivakas, A. Nick; Meunier, Vincent; Strauf, Stefan; Yang, Eui-Hyeok

doi:10.1038/s41467-020-15877-7

Title: Enabling room temperature ferromagnetism in monolayer MoS2 via in situ iron-doping

Journal Article · Mon Apr 27 00:00:00 EDT 2020 · Nature Communications

DOI:https://doi.org/10.1038/s41467-020-15877-7· OSTI ID:1780298

; Kang, Kyungnam;

; Yoshimura, Anthony;

; Wang, Xiaotian; Zhang, Lihua; Chen, Siwei; Liu, Na; Jindal, Apoorv; Li, Xiangzhi; Pasupathy, Abhay N.;

; Meunier, Vincent; Strauf, Stefan;

Abstract Two-dimensional semiconductors, including transition metal dichalcogenides, are of interest in electronics and photonics but remain nonmagnetic in their intrinsic form. Previous efforts to form two-dimensional dilute magnetic semiconductors utilized extrinsic doping techniques or bulk crystal growth, detrimentally affecting uniformity, scalability, or Curie temperature. Here, we demonstrate an in situ substitutional doping of Fe atoms into MoS ₂ monolayers in the chemical vapor deposition growth. The iron atoms substitute molybdenum sites in MoS ₂ crystals, as confirmed by transmission electron microscopy and Raman signatures. We uncover an Fe-related spectral transition of Fe:MoS ₂ monolayers that appears at 2.28 eV above the pristine bandgap and displays pronounced ferromagnetic hysteresis. The microscopic origin is further corroborated by density functional theory calculations of dipole-allowed transitions in Fe:MoS ₂ . Using spatially integrating magnetization measurements and spatially resolving nitrogen-vacancy center magnetometry, we show that Fe:MoS ₂ monolayers remain magnetized even at ambient conditions, manifesting ferromagnetism at room temperature.

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Research Organization:: Brookhaven National Lab. (BNL), Upton, NY (United States)

Sponsoring Organization:: USDOE Office of Science (SC), Basic Energy Sciences (BES); National Science Foundation (NSF); US Air Force Office of Scientific Research (AFOSR)

Grant/Contract Number:: Contract No. DE-SC0012704; SC0012704; NSF-DMR-1809235; NSF-EFRI-1641094; ECCS-MRI-1531237; NSF-ECCS-1608171; DMR-1420634; NSF-CAREER-DMR-1553788; FA9550-19-1-0074; NSF-DMR-0922522; W15QKN-05-D-0011

OSTI ID:: 1780298

Alternate ID(s):: OSTI ID: 1632390

Report Number(s):: BNL-215995-2020-JAAM; 2034; PII: 15877

Journal Information:: Nature Communications, Journal Name: Nature Communications Vol. 11 Journal Issue: 1; ISSN 2041-1723

Publisher:: Nature Publishing GroupCopyright Statement

Country of Publication:: United Kingdom

Language:: English

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Cited by: 68 works

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