Magnetoelectronic and optical properties of a &lt;span class="aps-inline-formula"&gt;&lt;math&gt;&lt;msub&gt;&lt;mrow&gt;&lt;mi&gt;MoS&lt;/mi&gt;&lt;/mrow&gt;&lt;mn&gt;2&lt;/mn&gt;&lt;/msub&gt;&lt;/math&gt;&lt;/span&gt; monolayer

Ho, Yen-Hung; Wang, Yi Hua; Chen, Hong Yi

doi:10.1103/physrevb.89.155316

Cited by 26 publications

(23 citation statements)

References 29 publications

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“…Due to the simplicity of this model, it can be particularly useful in the study of many-body physics and finite size systems. This model has been applied to the study of edge states in MX 2 nanoribbon, 70 quantum dots formed by lateral confinement potential in extended MX 2 monolayer, 73 intercellular orbital magnetic moment, 31 magnetoelectronic and optical properties, 213 and magnetoluminescence. 214 All the TB models introduced above are capable of describing the low-energy physics of monolayer TMDs in the ±K valleys.…”

Section: Theoretical Modelsmentioning

confidence: 99%

Electronic structures and theoretical modelling of two-dimensional group-VIB transition metal dichalcogenides

et al. 2015

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Atomically thin group-VIB transition metal dichalcogenides (TMDs) have recently emerged as a new class of two-dimensional (2D) semiconductors with extraordinary properties including the direct band gap in the visible frequency range, the pronounced spin-orbit coupling, the ultra-strong Coulomb interaction, and the rich physics associated with the valley degree of freedom. These 2D TMDs exhibit great potentials for device applications and have attracted vast interest for the exploration of new physics. 2D TMDs have complex electronic structures which underlie their physical properties. Here we review the bulk electronic structures in these new 2D materials as well as the theoretical models developed at different levels, along which we sort out the understandings on the origins of a variety of properties observed or predicted.

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Section: Theoretical Modelsmentioning

confidence: 99%

Electronic structures and theoretical modelling of two-dimensional group-VIB transition metal dichalcogenides

et al. 2015

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“…We now describe response of TMDC's to the applied magnetic field 11,23,35,38,[43][44][45][46][47][48][49][50][51][52][53][54][55][56] . The perpendicular mag-…”

Section: Magnetic Field -Lande G-factorsmentioning

confidence: 99%

“…There are already several tight-binding approaches to TMDCs by, e.g., Rostami et al 30 , Liu et al 31 , Cappelluti et al 32 , Zahid et al 33 , Fang et al 34 and others [35][36][37][38][39][40][41] as well as k • p approaches by Kormányos et al 42 . Each contribution brings new physics and adds on to our understanding of TMDCs.…”

Section: Introductionmentioning

confidence: 99%

Band nesting, massive Dirac fermions, and valley Landé and Zeeman effects in transition metal dichalcogenides: A tight-binding model

et al. 2018

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We present here the minimal tight-binding model for a single layer of transition metal dichalcogenides (TMDCs) MX2 (M-metal, X-chalcogen) which illuminates the physics and captures band nesting, massive Dirac Fermions and Valley Lande and Zeeman magnetic field effects. TMDCs share the hexagonal lattice with graphene but their electronic bands require much more complex atomic orbitals. Using symmetry arguments, a minimal basis consisting of 3 metal d-orbitals and 3 chalcogen dimer p-orbitals is constructed. The tunneling matrix elements between nearest neighbor metal and chalcogen orbitals are explicitly derived at K, −K and Γ points of the Brillouin zone. The nearest neighbor tunneling matrix elements connect specific metal and sulfur orbitals yielding an effective 6 × 6 Hamiltonian giving correct composition of metal and chalcogen orbitals but not the direct gap at K points. The direct gap at K, correct masses and conduction band minima at Q points responsible for band nesting are obtained by inclusion of next neighbor Mo-Mo tunneling. The parameters of the next nearest neighbor model are successfully fitted to MX2 (M=Mo, X=S) density functional (DFT) ab-initio calculations of the highest valence and lowest conduction band dispersion along K −Γ line in the Brillouin zone. The effective two-band massive Dirac Hamiltonian for MoS2, Lande g-factors and valley Zeeman splitting are obtained.

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“…From a fundamental point of view, many efforts have focused on different properties of MoS 2 and other group-VI dichalcogenides in the absence of a magnetic field. To see the effects of such a field and the corresponding Landau levels (LLs), magnetoptical properties [14][15][16] have been theoretically studied.…”

Section: Introductionmentioning

confidence: 99%

Quantum magnetotransport properties of aMoS2monolayer

2016

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We study transport properties of a MoS 2 monolayer in the presence of a perpendicular magnetic field B. We derive and discuss its band structure and take into account spin and valley Zeeman effects. Compared to a conventional two-dimensional electron gas, these effects lead to new quantum Hall plateaus and new peaks in the longitudinal resistivity as functions of the magnetic field. The field B leads to a significant enhancement of the spin splitting in the conduction band, to a beating of the Shubnikov-de Haas (SdH) oscillations in the low-field regime, and to their splitting in the high-field regime. The Zeeman fields suppress significantly the beating of the SdH oscillations in the low-field regime and strongly enhance their splitting at high fields. The spin and valley polarizations show a similar beating pattern at low fields and are clearly separated at high fields in which they attain a value higher than 90%.

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Magnetoelectronic and optical properties of a <span class="aps-inline-formula"><math><msub><mrow><mi>MoS</mi></mrow><mn>2</mn></msub></math></span> monolayer

Cited by 26 publications

References 29 publications

Electronic structures and theoretical modelling of two-dimensional group-VIB transition metal dichalcogenides

Electronic structures and theoretical modelling of two-dimensional group-VIB transition metal dichalcogenides

Band nesting, massive Dirac fermions, and valley Landé and Zeeman effects in transition metal dichalcogenides: A tight-binding model

Quantum magnetotransport properties of aMoS2monolayer

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