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Tiwari S, Van de Put M, Sorée B, Hinkle C, Vandenberghe WG. Reduction of Magnetic Interaction Due to Clustering in Doped Transition-Metal Dichalcogenides: A Case Study of Mn-, V-, and Fe-Doped WSe 2. ACS APPLIED MATERIALS & INTERFACES 2024; 16:4991-4998. [PMID: 38235733 DOI: 10.1021/acsami.3c14114] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/19/2024]
Abstract
Using Hubbard-U-corrected density functional theory calculations, lattice Monte Carlo simulations, and spin Monte Carlo simulations, we investigate the impact of dopant clustering on the magnetic properties of WSe2 doped with period four transition metals. We use manganese (Mn) and iron (Fe) as candidate n-type dopants and vanadium (V) as the candidate p-type dopant, substituting the tungsten (W) atom in WSe2. Specifically, we determine the strength of the exchange interaction in Fe-, Mn-, and V-doped WSe2 in the presence of clustering. We show that the clusters of dopants are energetically more stable than discretely doped systems. Further, we show that in the presence of dopant clustering, the magnetic exchange interaction significantly reduces because the magnetic order in clustered WSe2 becomes more itinerant. Finally, we show that the clustering of the dopant atoms has a detrimental effect on the magnetic interaction, and to obtain an optimal Curie temperature, it is important to control the distribution of the dopant atoms.
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Affiliation(s)
- Sabyasachi Tiwari
- Department of Materials Science and Engineering, The University of Texas at Dallas, 800 W Campbell Rd., Richardson, Texas 75080, United States
- Imec, Kapeldreef 75, 3001 Heverlee, Belgium
- Department of Materials Engineering, KU Leuven, Kasteelpark Arenberg 44, 3001 Leuven, Belgium
| | - Maarten Van de Put
- Department of Materials Science and Engineering, The University of Texas at Dallas, 800 W Campbell Rd., Richardson, Texas 75080, United States
- Imec, Kapeldreef 75, 3001 Heverlee, Belgium
| | - Bart Sorée
- Imec, Kapeldreef 75, 3001 Heverlee, Belgium
- Department of Electrical Engineering, KU Leuven, Kasteelpark Arenberg 10, 3001 Leuven, Belgium
- Department of Physics, Universiteit Antwerpen, Groenenborgerlaan 171, 2020 Antwerp, Belgium
| | - Christopher Hinkle
- Department of Electrical Engineering, University of Notre Dame, Notre Dame, Indiana 46556, United States
| | - William G Vandenberghe
- Department of Materials Science and Engineering, The University of Texas at Dallas, 800 W Campbell Rd., Richardson, Texas 75080, United States
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Li L, Carter EA. Defect-Mediated Charge-Carrier Trapping and Nonradiative Recombination in WSe2 Monolayers. J Am Chem Soc 2019; 141:10451-10461. [DOI: 10.1021/jacs.9b04663] [Citation(s) in RCA: 50] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
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Kumar P, Skomski R, Pushpa R. Magnetically Ordered Transition-Metal-Intercalated WSe 2. ACS OMEGA 2017; 2:7985-7990. [PMID: 31457349 PMCID: PMC6645032 DOI: 10.1021/acsomega.7b01164] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/10/2017] [Accepted: 11/03/2017] [Indexed: 05/28/2023]
Abstract
Introducing magnetic behavior in nonmagnetic transition metal dichalcogenides is essential to broaden their applications in spintronic and nanomagnetic devices. In this article, we investigate the electronic and magnetic properties of transition-metal-intercalated tungsten diselenide (WSe2) using density functional theory. We find that intercalation compounds with composition of T1/4WSe2 (T is an iron-series transition-metal atom) exhibit substantial magnetic moments and pronounced ferromagnetic order for late transition metals. The densities of states of the T atoms and the magnetic moments on the W sites indicate that the moments of the intercalated atoms become more localized with increasing atomic number. A large perpendicular magnetocrystalline anisotropy of about 9 meV per supercell has been found for Fe1/4WSe2. Furthermore, using mean field theory, we estimated high Curie temperatures of 660, 475, and 379 K for Cr, Mn, and Fe, respectively. The predicted magnetic properties suggest that WSe2 may have applications in spin electronics and nanomagnetic devices.
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Affiliation(s)
- Pankaj Kumar
- Department
of Physics, Boise State University, 1910 University Dr., Boise, Idaho 83725, United States
| | - Ralph Skomski
- Department
of Physics and Astronomy and NCMN, University
of Nebraska, Lincoln, Nebraska 68588, United
States
| | - Raghani Pushpa
- Department
of Physics, Boise State University, 1910 University Dr., Boise, Idaho 83725, United States
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A density functional theory study of electronic properties of substitutional alloying of monolayer MoS 2 and CeS 2 surface models. COMPUT THEOR CHEM 2016. [DOI: 10.1016/j.comptc.2016.03.025] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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