biostudies-literatureChen JUniversity of Science and Technology of ChinaNational Basic Research Program of ChinaChinese Academy of SciencesNational Natural Science Foundation of China6388-6394https://www.ebi.ac.uk/biostudies/studies/S-EPMC9049672biostudies-literatureUnknown10(11)Two-dimensional (2D) Janus transition-metal dichalcogenides (TMDs) (MXY, M = Mo, W; X, Y = S, Se, Te; X ≠ Y) have desirable energy gaps and high stability in ambient conditions, similar to traditional 2D TMDs with potential applications in electronics. But different from traditional 2D TMDs, 2D Janus TMDs possess intrinsic Rashba spin splitting due to out-of-plane mirror symmetry breaking, with promising applications in spintronics. Here we demonstrate a new and effective way to manipulate the Rashba effect in 2D Janus TMDs, that is, charge doping, by using first-principles density functional theory (DFT) calculations. We find that electron doping can effectively strengthen the Rashba spin splitting at the valence band maximum (VBM) and conduction band minimum (CBM) in 2D Janus TMDs withouRSC advancesTunable Rashba spin splitting in Janus transition-metal dichalcogenide monolayers <i>via</i> charge doping.PMC9049672218030662016YFA0200604XDC01040100KY234000010321688102Wu KYang JChen JHu WMa HfalseTunable Rashba spin splitting in Janus transition-metal dichalcogenide monolayers <i>via</i> charge doping.Two-dimensional (2D) Janus transition-metal dichalcogenides (TMDs) (MXY, M = Mo, W; X, Y = S, Se, Te; X ≠ Y) have desirable energy gaps and high stability in ambient conditions, similar to traditional 2D TMDs with potential applications in electronics. But different from traditional 2D TMDs, 2D Janus TMDs possess intrinsic Rashba spin splitting due to out-of-plane mirror symmetry breaking, with promising applications in spintronics. Here we demonstrate a new and effective way to manipulate the Rashba effect in 2D Janus TMDs, that is, charge doping, by using first-principles density functional theory (DFT) calculations. We find that electron doping can effectively strengthen the Rashba spin splitting at the valence band maximum (VBM) and conduction band minimum (CBM) in 2D Janus TMDs withou2020-01-01T00:00:00Z2020 Feb2025-04-04T07:34:39.47Z2025-04-04T07:34:39.47ZS-EPMC90496723549599810.1039/d0ra00674b