Magnetotransport properties of an unconventional Rashba spin-orbit coupled two-dimensional electronic system

Abstract

We study the magnetotransport properties of a two-dimensional electronic system with unconventional Rashba spin-orbit coupling in which the system is described by a pair of chiral spin texture in each spin branch, and the chirality is opposite in two spin branches. We obtain the Landau levels analytically and find that intra-spin and/or inter-spin Landau level crossing occurs. We compute the longitudinal conductivity and quantum Hall conductivity using the Kubo formalism based on linear response theory. We find that the usual Shubnikov-de Haas oscillation in longitudinal conductivity appears that can be made purely spin polarized by adjusting the Fermi level suitably. We observe a beating pattern in the Shubnikov-de Hass oscillation in the intra-spin branches, which arises due to the superposition of Shubnikov-de Hass oscillations corresponding to two bands in each spin branch. This is contrary to the conventional Rashba system, where such beating is due to the superposition of Shubnikov-de Hass oscillations corresponding to the two spin-branches. On the other hand, we note that quantum-Hall conductivity exhibits usual quantization in units of $e^2/h$ corresponding to each spin dependent Landau level. However, the Landau level crossing gives rise to the double jump in the Hall conductivity if the Fermi level is placed precisely at the crossing point.

12 pages and 18 figures

References in corpus (19)

• Signatures of Majorana fermions in hybrid superconductor-semiconductor nanowire devices
• Unconventional quantum Hall effect and Berry's phase of 2pi in bilayer graphene
• Unconventional Integer Quantum Hall effect in graphene
• Emergence of the persistent spin helix in semiconductor quantum wells
• Measurement of Rashba and Dresselhaus spin-orbit magnetic fields
• Ballistic superconductivity in semiconductor nanowires
• Valley polarized quantum Hall effect and topological insulator phase transitions in silicene
• Rashba-Edelstein Magnetoresistance in Metallic Heterostructure
• Resonant spin Hall conductance in quantum Hall systems lacking bulk and structural inversion symmetry
• Spin relaxation under identical Dresselhaus and Rashba coupling strengths in GaAs quantum wells
• Exact Landau Levels in Two-Dimensional Electron Systems with Rashba and Dresselhaus Spin-Orbit Interactions in a Perpendicular Magnetic Field
• Quantum Hall studies of a Semi-Dirac Nanoribbon
• Giant Inverse Rashba-Edelstein Effect: Application to Monolayer OsBi${}_2$
• Integer Quantum Hall Effect: Disorder, temperature, floating, and plateau width
• Beating pattern in quantum magnetotransport coefficients of spin-orbit coupled Dirac fermions in gated silicene
• A generic model with unconventional Rashba bands and giant spin galvanic effect
• Superconductivity in Two-Dimensional Systems with Unconventional Rashba Bands
• Electric field induced second-order anomalous Hall transport in unconventional Rashba systems
• Plasmonic detection of Rashba spin-orbit coupling in monolayer transition-metal dichalcogenides