Journal
PHYSICAL REVIEW LETTERS
Volume 110, Issue 6, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.110.066803
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Funding
- DOE-DMSE [DE-FG03-02ER45958]
- NBRPC [2012CB-921300]
- NSFC [91121004]
- Welch Foundation [F-1255]
- DARPA [SPAWAR N66001-11-1-4110]
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We analyze the Landau level (LL) structure in a MoS2 trilayer and find a field-dependent unconventional Hall plateau sequence v = . . ., -2M -6, -2M -4, -2M -2, -2M -1, . . ., -5, -3, -1, 0, 2, 4, . . .. Because of orbital asymmetry, the low-energy Dirac fermions become heavily massive and the LL energies grow linearly with B, rather than with root B. Spin-orbital couplings break spin and valley degenerate LL's into two groups, with LL crossing effects present in the valence bands. In a p-n junction, spin-resolved fractionally quantized conductance appears in two-terminal measurements with a controllable spin-polarized current that can be probed at the interface. We also show the tunability of zero-field spin Hall conductivity. DOI: 10.1103/PhysRevLett.110.066803
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