Pt@WS 2 -an Extrinsic 2D Dilute Ferromagnetic Semiconductor Beyond Room Temperature.

Autor: Chen YX; Institute of Atomic and Molecular Sciences, Academia Sinica, Taipei, 10617, Taiwan.; International Graduate Program of Molecular Science and Technology, National Taiwan University, Taipei, 10617, Taiwan.; Molecular Science and Technology Program, Taiwan International Graduate Program, Academia Sinica, Taipei, 10617, Taiwan., Hsiao KW; Department of Physics, National Taiwan Normal University, Taipei, 10617, Taiwan., Chin HT; Institute of Atomic and Molecular Sciences, Academia Sinica, Taipei, 10617, Taiwan.; International Graduate Program of Molecular Science and Technology, National Taiwan University, Taipei, 10617, Taiwan.; Molecular Science and Technology Program, Taiwan International Graduate Program, Academia Sinica, Taipei, 10617, Taiwan., Chen DR; Institute of Atomic and Molecular Sciences, Academia Sinica, Taipei, 10617, Taiwan.; International Graduate Program of Molecular Science and Technology, National Taiwan University, Taipei, 10617, Taiwan.; Molecular Science and Technology Program, Taiwan International Graduate Program, Academia Sinica, Taipei, 10617, Taiwan., Yen ZL; Institute of Atomic and Molecular Sciences, Academia Sinica, Taipei, 10617, Taiwan.; International Graduate Program of Molecular Science and Technology, National Taiwan University, Taipei, 10617, Taiwan.; Molecular Science and Technology Program, Taiwan International Graduate Program, Academia Sinica, Taipei, 10617, Taiwan., Lan YW; Department of Physics, National Taiwan Normal University, Taipei, 10617, Taiwan., Ting CC; Graduate Institute of Opto-Mechatronics, Department of Mechanical Engineering, National Chung Cheng University, Chia-Yi, 62102, Taiwan., Hofmann M; Department of Physics, National Taiwan University, Taipei, 10617, Taiwan., Chiang CT; Institute of Atomic and Molecular Sciences, Academia Sinica, Taipei, 10617, Taiwan.; Molecular Science and Technology Program, Taiwan International Graduate Program, Academia Sinica, Taipei, 10617, Taiwan.; Department of Physics, National Taiwan University, Taipei, 10617, Taiwan., Chan YH; Institute of Atomic and Molecular Sciences, Academia Sinica, Taipei, 10617, Taiwan.; Physics Division, National Center of Theoretical Sciences, Taipei, 10617, Taiwan., Vejpravová JK; Department of Condensed Matter Physics, Faculty of Mathematics and Physics, Charles University, Ke Karlovu 5, Prague 2, 121 16, Czech Republic., Hsieh YP; Institute of Atomic and Molecular Sciences, Academia Sinica, Taipei, 10617, Taiwan.
Jazyk: angličtina
Zdroj: Small methods [Small Methods] 2024 Sep 20, pp. e2400955. Date of Electronic Publication: 2024 Sep 20.
DOI: 10.1002/smtd.202400955
Abstrakt: Extrinsic dilute magnetic semiconductors achieve magnetic functionality through tailored interaction between a semiconducting matrix and a non-magnetic dopant. The absence of intrinsic magnetic impurities makes this approach promising to investigate the newly emerging field of 2D dilute magnetic semiconductors. Here the first realization of an extrinsic 2D DMS in Pt-doped WS 2 is demonstrated. A bottom-up synthesis approach yields a uniform and highly crystalline monolayer where platinum selectively occupies the tungsten sub-lattice. The orbital overlap between W 4d and Pt 5d results in spin-selective hybrid states that produce a strong valley-Zeeman splitting. Combined experimental and theoretical results show that this interaction yields a sizable ferromagnetic response with a Curie temperature ≈375 K. These results open up a new route toward 2D magnetic properties through tailoring of atomic interactions for future applications in spintronics and magnetic nanoactuation.
(© 2024 Wiley‐VCH GmbH.)
Databáze: MEDLINE
Externí odkaz: