By using the VASP, we studied the magnetic and electronic properties of the monolayer lateral hetero-junction WS 2-MoS 2-nanoribbons (WS 2-MoS 2-NRs). Our results show that the NRs' edge chirality and width affect significantly its magnetic and electronic properties. The monolayer lateral hetero-junction ZZ-WS 2-MoS 2-NRs(ZZ: zigzag) exhibitmetallic behavior and have considerable magnetic moment. Their magnetic moments decrease in the order of N z =2, 6 and 4 (the width of NRs). While, the magnetic moment decreases with the increased r z (the number of the Mo-S chains,rz≠0 and rz≠N z) at the same width N z. The N A-AC-WS 2-NR (AC: armchair) and N A-AC-WS 2-MoS 2-NR-1 (the number of the Mo-S chain is 1) show metallic behavior when N A =3 (the width of NRs). The other monolayer lateral hetero-junction AC-WS 2-MoS 2-NRs remain the nonmagnetic and semiconductingbehavior as bulk. But they are indirect band-gap except for the N A =3, r A =2 (the number of the Mo-S chains) and N A =7, r A =0 when N A <9. However they are direct band-gap when NA≥9. Their lowest and highest band gaps are 0.150eV and 0.581eV, respectively. These unique magnetic and electronic properties will provide guidanceon the WS 2-MoS 2 hetero-junction application in nanodevice.
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