Magnetic properties of Na-doped WS 2 monolayer in the presence of isotropic strain
M. Luo+, H. H. Yin*, J. H. Chu*
+Department of Physics, Shanghai Polytechnic University, 201209 Shanghai, P.R. China
*School of Electronics and Information, Nantong University, 226019 Nantong, P.R. China
Abstract
Magnetic properties of Na-doped WS2 monolayer under strain are
investigated by ab initio methods. Without strain, the Na-doped WS2
monolayer is a magnetic nanomaterial and the total magnetic moment is
about 1.07 μB. We applied strain to Na-doped WS2
monolayer from -10 % to 10 %. The magnetic properties are modified
under different strain, the doped system gets a maximum value of
2.01 μB at 10 % tensile strain and a minimum value of
0 μB at -10 % compressive strain. The coupling between
3p states of S and 5d states of W is responsible for the strong strain
effect on the magnetic properties. Our studies predict Na-doped WS2
monolayer under strain to be candidates for application in spintronics.