Intervalley Scattering and Localization Behaviors of Spin-Valley Coupled Dirac Fermions

Abstract

We study the quantum diffusive transport of multivalley massive Dirac cones, where time-reversal symmetry requires opposite spin orientations in inequivalent valleys. We show that the intervalley scattering and intravalley scattering can be distinguished from the quantum conductivity that corrects the semiclassical Drude conductivity, due to their distinct symmetries and localization trends. In immediate practice, it allows transport measurements to estimate the intervalley scattering rate in hole-doped monolayers of group-VI transition metal dichalcogenides (e.g., molybdenum dichalcogenides and tungsten dichalcogenides), an ideal class of materials for valleytronics applications. The results can be generalized to a large class of multivalley massive Dirac systems with spin-valley coupling and time-reversal symmetry.

5 pages+4 pages of supplemental materials, 4 figures

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Cited by in corpus (22)

• Electronic properties of single-layer and multilayer transition metal dichalcogenides $M{X}_2$ ($M=$ Mo, W and $X=$ S, Se)
• Dark excitons in transition metal dichalcogenides
• Topological Phase Transition in Mechanical Honeycomb Lattice
• Valley Polarization by Spin Injection in a Light-Emitting van der Waals Heterojunction
• Effect of Point Defects on the Optical and Transport Properties of MoS2 and WS2
• Weak antilocalization and localization in disordered and interacting Weyl semimetals
• Temperature Dependent Valley Relaxation Dynamics in Single Layer WS2 Measured Using Ultrafast Spectroscopy
• Excitons and trions in monolayer transition metal dichalcogenides: A comparative study between the multiband model and the quadratic single-band model
• Intrinsic circular polarization in centrosymmetric stacks of transition-metal dichalcogenides
• Optical generation and detection of pure valley current in monolayer transition metal dichalcogenides
• Magneto-optical transport properties of monolayer WSe2
• Spin-valley relaxation and quantum transport regimes in two-dimensional transition metal dichalcogenides
• Modification of electronic structure and thermoelectric properties of hole-doped tungsten dichalcogenides
• Symmetry-forbidden intervalley scattering by atomic defects in monolayer transition-metal dichalcogenides
• Infrared to terahertz optical conductivity of $n$-type and $p$-type monolayer MoS${}_2$ in the presence of Rashba spin-orbit coupling
• Weak Localization, Spin Relaxation, and Spin-Diffusion: The Crossover Between Weak and Strong Rashba Coupling Limits
• Atomistic $T$-matrix theory of disordered 2D materials: Bound states, spectral properties, quasiparticle scattering, and transport
• Valley- and spin-filter in monolayer MoS${}_2$
• Optical fingerprint of non-covalently functionalized transition metal dichalcogenides
• Multi-component plasmons in monolayer MoS${}_2$ with circularly polarized optical pumping
• Longitudinal and transverse mobilities of $n$-type monolayer transition metal dichalcogenides in the presence of proximity-induced interactions at low temperature
• Linear magnetoresistance of two-dimensional massless Dirac fermions in the quantum limit