Valley Zeeman effect and spin-valley polarized conductance in monolayer MoS${}_2$ in a perpendicular magnetic field

Abstract

We study the effect of a perpendicular magnetic field on the electronic structure and charge transport of a monolayer MoS${}_2$ nanoribbon at zero temperature. We particularly explore the induced valley Zeeman effect through the coupling between the magnetic field, $B$, and the orbital magnetic moment. We show that the effective two-band Hamiltonian provides a mismatch between the valley Zeeman coupling in the conduction and valence bands due to the effective mass asymmetry and it is proportional to $B^2$ similar to the diamagnetic shift of exciton binding energies. However, the dominant term which evolves with $B$ linearly, originates from the multi-orbital and multi-band structures of the system. Besides, we investigate the transport properties of the system by calculating the spin-valley resolved conductance and show that, in a low-hole doped case, the transport channels at the edge are chiral for one of the spin components. This leads to a localization of the non-chiral spin component in the presence of disorder and thus provides a spin-valley polarized transport induced by disorder.

arXiv comment12 pages, 7 figures, new references are added

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Cited by in corpus (32)

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• Theory of strain in single-layer transition metal dichalcogenides
• Observation of Valley Zeeman and Quantum Hall Effects at Q Valley of Few-Layer Transition Metal Disulfides
• Multipath optical recombination of intervalley dark excitons and trions in monolayer WSe${}_2$
• Ab-initio studies of exciton $g$ factors: Monolayer transition metal dichalcogenides in magnetic fields
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• Plasmonic physics of 2D crystalline materials
• Tutorial: Exciton resonances for atomically-thin optics
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• Boundary conditions for transition-metal dichalcogenide monolayers in the continuum model
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• Transient Hot Electron Dynamics in Single-Layer TaS${}_2$
• Plasmon modes of bilayer molybdenum disulfide: A density functional study
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• Nonlinear exciton drift in piezoelectric two-dimensional materials
• Intrinsic torque on the orbital angular momentum in an electric field
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• Magnetoresistance in Noncentrosymmetric Two-dimensional Systems
• SQUID pattern disruption in transition metal dichalcogenide Josephson junctions due to non-parabolic dispersion of the edge states
• Perfect valley polarization in MoS2
• Robust multicolor single photon emission from point defects in hexagonal boron nitride
• Topologically induced fractional Hall steps in the integer quantum Hall regime of $Mo{S}_2$
• Semiclassical theory for the orbital magnetic moment of superconducting quasiparticles
• Prefect spin filtering and spin inverting using a MoS2 quantum dot