Spin-orbit coupling, quantum dots, and qubits in monolayer transition metal dichalcogenides

Abstract

We derive an effective Hamiltonian which describes the dynamics of electrons in the conduction band of transition metal dichalcogenides (TMDC) in the presence of perpendicular electric and magnetic fields. We discuss in detail both the intrinsic and the Bychkov-Rashba spin-orbit coupling (SOC) induced by an external electric field. We point out interesting differences in the spin-split conduction band between different TMDC compounds. An important consequence of the strong intrinsic SOC is an effective out-of-plane $g$-factor for the electrons which differs from the free-electron g-factor $g\simeq 2$. We identify a new term in the Hamiltonian of the Bychkov-Rashba SOC which does not exist in III-V semiconductors. Using first-principles calculations, we give estimates of the various parameters appearing in the theory. Finally, we consider quantum dots (QDs) formed in TMDC materials and derive an effective Hamiltonian which allows us to calculate the magnetic field dependence of the bound states in the QDs. We find that all states are both valley and spin split, which suggests that these QDs could be used as valley-spin filters. We explore the possibility of using spin and valley states in TMDCs as quantum bits, and conclude that, due to the relatively strong intrinsic spin-orbit splitting in the conduction band, the most realistic option appears to be a combined spin-valley (Kramers) qubit at low magnetic fields.

minor corrections made

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Cited by in corpus (147)

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• Manipulation of the large Rashba spin splitting in polar two-dimensional transition metal dichalcogenides
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• Exciton fine structure and spin decoherence in monolayers of transition metal dichalcogenides
• \textit{Ab-initio} Tight-Binding Hamiltonian for Transition Metal Dichalcogenides
• Possible Topological Superconducting Phases of MoS${}_2$
• Polarization analysis of excitons in monolayer and bilayer transition-metal dichalcogenides
• Microsecond dark-exciton valley polarization memory in 2D heterostructures
• Strain-tunable orbital, spin-orbit, and optical properties of monolayer transition-metal dichalcogenides
• Magneto-optics in transition metal diselenide monolayers
• Probing the spin-polarized electronic band structure in monolayer transition metal dichalcogenides by optical spectroscopy
• Exciton g-factors of van der Waals heterostructures from first principles calculations
• Induced spin-orbit coupling in twisted graphene-TMDC heterobilayers: twistronics meets spintronics
• Spontaneous Antisymmetric Spin Splitting in Noncollinear Antiferromagnets without Spin-Orbit Coupling
• Discrete quantum dot like emitters in monolayer MoSe2: Spatial mapping, Magneto-optics and Charge tuning
• Interactions and magnetotransport through spin-valley coupled Landau levels in monolayer MoS${}_2$
• Efficient spin injection and giant magnetoresistance in Fe/MoS${}_2$/Fe junctions
• Molecular beam epitaxy growth and scanning tunneling microscopy study of TiSe${}_2$ ultrathin films
• Large effective mass and interaction-enhanced Zeeman splitting of $K$-valley electrons in MoSe${}_2$
• Density-Dependent Quantum Hall States and Zeeman Splitting in Monolayer and Bilayer WSe${}_2$
• Floquet Majorana and Para-Fermions in Driven Rashba Nanowires
• Tunable Berry curvature, valley and spin Hall effect in Bilayer MoS${}_2$
• Valley Zeeman effect and spin-valley polarized conductance in monolayer MoS${}_2$ in a perpendicular magnetic field
• Valley Contrasting Magnetoluminescence in Monolayer MoS${}_2$ Quantum Hall Systems
• Magneto-excitons in large area CVD grown monolayer MoS${}_2$ and MoSe${}_2$ on sapphire
• Intervalley coupling by quantum dot confinement potentials in monolayer transition metal dichalcogenides
• Electronic Band Structure of Transition Metal Dichalcogenides from Ab Initio and Slater-Koster Tight-Binding Model
• Gate-Tunable Quantum Dot in a High Quality Single Layer MoS${}_2$ Van der Waals Heterostructure
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• Probing Many-Body Interactions in Monolayer Transition-Metal Dichalcogenides
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• Towards superfluidity of dipolar excitons in a TMDC double layer
• Photonic crystals to enhance light extraction from 2D materials
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• Dipolar and magnetic properties of strongly absorbing hybrid interlayer excitons in pristine bilayer MoS${}_2$
• Electric field and Strain-induced Band-gap Engineering and Manipulation of the Rashba Spin Splitting in Janus van der Waals Heterostructures
• Electrotunable artificial molecules based on van der Waals heterostructures
• Strain-controlled spin splitting in the conduction band of monolayer WS2
• Moiré-trapped interlayer trions in a charge-tunable WSe${}_2$/MoSe${}_2$ heterobilayer
• Valley qubit in gated MoS${}_2$ monolayer quantum dot
• Dielectrics for Two-Dimensional Transition Metal Dichalcogenide Applications
• Gate-Defined Quantum Confinement in InSe-based van der Waals Heterostructures
• A Tight Binding Approach to Strain and Curvature in Monolayer Transition-Metal Dichalcogenides
• Fine structure of $\mathrm{K}$-excitons in multilayers of transition metal dichalcogenides
• Atomically inspired $k\cdot p$ approach and valley Zeeman effect in transition metal dichalcogenide monolayers
• Distinctive signatures of the spin- and momentum-forbidden dark exciton states in the photo-luminescences of strained WSe${}_2$ monolayers under thermalization
• Impurity-assisted electric control of spin-valley qubits in monolayer MoS${}_2$
• $k\cdot p$ theory for phosphorene: Effective g-factors, Landau levels, and excitons
• Quantum Transport in Two-Dimensional WS${}_2$ with High-Efficiency Carrier Injection Through Indium Alloy Contacts
• Hybrid spin and valley quantum computing with singlet-triplet qubits
• Control of valley dynamics in silicon quantum dots in the presence of an interface step
• Exciton valley depolarization in monolayer transition-metal dichalcogenides
• Spin-resolved optical conductivity of two-dimensional group-VIB transition-metal dichalcogenides
• Mechanism of antisymmetric spin polarization in centrosymmetric multiple-$Q$ magnets based on bilinear and biquadratic spin cross products
• Edge states in dichalcogenide nanoribbons and triangular quantum dots
• Theory of Strain-Induced Confinement in Transition Metal Dichalcogenide Monolayers
• Resonant and Bound States of Charged Defects in Two-Dimensional Semiconductors
• Gate-defined, Accumulation-mode Quantum Dots in Monolayer and Bilayer WSe${}_2$
• Observation of bright and dark exciton transitions in monolayer MoSe2 by photocurrent spectroscopy
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• Single-electron Transport in Graphene-like Nanostructures
• Light-matter interaction in van der Waals heterostructures
• First-order magnetic phase-transition of mobile electrons in monolayer MoS${}_2$
• Infrared to terahertz optical conductivity of $n$-type and $p$-type monolayer MoS${}_2$ in the presence of Rashba spin-orbit coupling
• Tunable topological Nernst effect in 2D transition metal dichalcogenides
• Unconventional superconductivity from magnetism in transition metal dichalcogenide
• Inlaid ReS2 Quantum Dots in Monolayer MoS2
• Spin-Degenerate Regimes for Single Quantum Dots in Transition Metal Dichalcogenide Monolayers
• Spin-valley locking for in-gap quantum dots in a MoS2 transistor
• Magnetic field dependence of electronic properties of MoS${}_2$ quantum dots with different edges
• Valley two-qubit system in a MoS${}_2$-monolayer gated double quantum dot
• Spin-dependent Refraction at the Atomic Step of Transition-metal Dichalcogenides
• Electric Dipole Spin Resonance of 2D Semiconductor Spin Qubits
• Symmetry breaking and spin-orbit coupling for individual vacancy-induced in-gap states in MoS2 monolayers
• Superconducting contacts to a monolayer semiconductor
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• Enhanced Spin-Flip Scattering by Surface Roughness in WS${}_2$ and MoS${}_2$ Armchair Nanoribbons
• Electron spin diffusion in monolayer MoS${}_2$
• Spin and Valley Noise in Two-Dimensional Dirac Materials
• Topological multiferroic order in twisted transition metal dichalcogenide bilayers
• Exchange Intervalley Scattering And Magnetic Phase Diagram Of Transition Metal Dichalcogenide Monolayers
• Wigner Crystals in Two-Dimensional Transition-Metal Dichalcogenides: Spin Physics and Readout
• Valley and spin polarized broken symmetry states of interacting electrons in gated MoS${}_2$ quantum dots
• Valley relaxation in graphene due to charged impurities
• Controlling magnetism through Ising superconductivity in magnetic van der Waals heterostructures
• Berry curvature in monolayer MoS${}_2$ with broken mirror symmetry
• Hole spin relaxation in bilayer WSe${}_2$
• Theory of the Coherent Response of Magneto-Excitons and Magneto-Biexcitons in Monolayer Transition Metal Dichalcogenides
• Spin-orbit correlations and exchange-bias control in twisted Janus dichalcogenide multilayers
• Signature of spin-resolved quantum point contact in p-type trilayer WSe${}_2$ van der Waals heterostructure
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• Many-Body Effect of Mesoscopic Localized States in MoS${}_2$ Monolayer
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• Multi-component plasmons in monolayer MoS${}_2$ with circularly polarized optical pumping
• Ultrafast Phonon-Diffuse Scattering as a Tool for Observing Chiral Phonons in Monolayer Hexagonal Lattices
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• Protected edge states in silicene antidots and dots in magnetic field
• Tunable spin-orbit splitting in bilayer graphene/WSe${}_2$ quantum devices
• Strong Effects of Interlayer Interaction on Valence-Band Splitting in Transition Metal Dichalcogenides
• Spin Hall effect for polaritons in a TMDC monolayer embedded in a microcavity
• Magneto-optical conductivity of monolayer transition metal dichalcogenides in the presence of proximity-induced exchange interaction and external electrical field
• Orbital hyperfine interaction and qubit dephasing in carbon nanotube quantum dots
• Brightening odd-parity excitons in transition-metal dichalcogenides: Rashba spin-orbit interaction, skyrmions, and cavity polaritons
• Spin relaxation of localized electrons in monolayer MoSe${}_2$: importance of random effective magnetic fields
• Strong Cavity-Pseudospin Coupling in Monolayer Transition Metal Dichalcogenides: Spontaneous Spin-Oscillations and Magnetometry
• Twistronics and moiré superlattice physics in 2D transition metal dichalcogenides
• Collective excitations in two-component one-dimensional massless Dirac plasma
• Optically induced spin Hall current in Janus transition-metal dichalcogenides
• Phase coherent transport in bilayer and trilayer MoS2
• Magnetic phase transitions in two-dimensional two-valley semiconductors with in-plane magnetic field
• Interacting holes in a gated WSe${}_2$ quantum channel: valley correlations and zigzag Wigner crystal
• SQUID pattern disruption in transition metal dichalcogenide Josephson junctions due to non-parabolic dispersion of the edge states
• Theory of field-modulated spin-valley-orbital pseudospin physics
• Signature of Hanle Precession in Trilayer MoS2: Theory and Experiment
• Low-Temperature Annihilation Rate for Quasi-Localized Excitons in Monolayer MoS2
• Longitudinal and transverse mobilities of $n$-type monolayer transition metal dichalcogenides in the presence of proximity-induced interactions at low temperature
• Electrically tunable MoSe${}_2$/WSe${}_2$ heterostructure-based quantum dot
• Topological nature of in-gap bound states in disordered large-gap monolayer transition metal dichalcogenides
• Density-dependent spin susceptibility and effective mass in monolayer MoSe2
• Three-orbital continuous model for $1H$-type metallic transition-metal dichalcogenide monolayers
• Intersubband electric dipole spin resonance in transition metal dichalcogenide heterobilayers
• Resistively detected electron spin resonance and g-factor in few-layer exfoliated MoS2 devices
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• Plasmonic detection of Rashba spin-orbit coupling in monolayer transition-metal dichalcogenides
• Wannier Excitons Confined in Hexagonal Boron Nitride Triangular Quantum Dots
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