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arXiv · 1802.09584

Magnetic field dependence of electronic properties of MoS$_2$ quantum dots with different edges

Q. Chen·L. L. Li·F. M. Peeters
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Abstract

Using the tight-binding approach, we investigate the energy spectrum of square, triangular and hexagonal MoS$_2$ quantum dots (QDs) in the presence of a perpendicular magnetic field. Novel edge states emerge in MoS$_2$ QDs, which are distributed over the whole edge which we call ring states. The ring states are robust in the presence of spin-orbit coupling (SOC). The corresponding energy levels of the ring states oscillate as function of the perpendicular magnetic field which are related to Aharonov-Bohm oscillations. Oscillations in the magnetic field dependence of the energy levels and the peaks in the magneto-optical spectrum emerge (disappear) as the ring states are formed (collapsed). The period and the amplitude of the oscillation decreases with the size of the MoS$_2$ QDs.

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Q. Chen, L. L. Li, F. M. Peeters. 2018-02-26. Magnetic field dependence of electronic properties of MoS$_2$ quantum dots with different edges. https://doi.org/10.1103/physrevb.97.085437

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