The Lattice Distortion-Induced Ferromagnetism in the Chemical-Bonded MoSe2/WSe2 at Room Temperature

Shiu-Ming Huang; Pin-Cing Wang; Pin-Cyuan Chen

doi:10.1186/s11671-022-03692-6

The Lattice Distortion-Induced Ferromagnetism in the Chemical-Bonded MoSe₂/WSe₂ at Room Temperature

Nanoscale Res Lett. 2022 May 27;17(1):55. doi: 10.1186/s11671-022-03692-6.

Authors

Shiu-Ming Huang¹, Pin-Cing Wang², Pin-Cyuan Chen²

Affiliations

¹ Department of Physics, National Sun Yat-Sen University, 80424, Kaohsiung, Taiwan. smhuang@mail.nsysu.edu.tw.
² Department of Physics, National Sun Yat-Sen University, 80424, Kaohsiung, Taiwan.

Abstract

Ferromagnetism to non-ferromagnetism transition is detected in a chemically bonded MoSe[Formula: see text]/WSe[Formula: see text] powder with different thermal annealing temperatures. All samples exhibit ferromagnetism and Raman redshift, except for the 1100 °C thermally annealed sample in which the MoSe[Formula: see text] and WSe[Formula: see text] are thermally dissociated and geometrically separated. The element analysis reveals no significant element ratio difference and detectable magnetic elements in all samples. These results support that, in contrast to the widely reported structure defect or transition element dopant, the observed ferromagnetism originates from the structure distortion due to the chemical bonding at the interface between MoSe[Formula: see text] and WSe[Formula: see text].

Keywords: Chemically bonded; Ferromagnetism; Lattice distortion; Two-dimensional transition-metal dichalcogenides.