Charge and spin conductivity of a two-dimensional electron gas with a random Rashba interaction

2018/04/15 by S. Kudła, S. Kudla, A. Dyrdal +5 · 7 citations
Chemistry · Physics and Astronomy · #Atomic physics #Charge (physics) #Chemistry #Condensed matter physics #Conductivity #Electrical resistivity and conductivity #Electron #Electron transport chain #Fermi gas #Magnetic properties of thin films #Momentum (technical analysis) #Physics #Quantum and electron transport phenomena #Quantum mechanics #Relaxation (psychology) #Spin (aerodynamics) #Thermodynamics #Topological Materials and Phenomena #cond-mat.mes-hall

paper · pdf · doi:10.1103/physrevb.97.245307

published in Physical review. B./Physical review. B 97(24) (American Physical Society) · 7 pages, 4 figures

arxiv created 2018/04/15 · openalex created_date 2018/04/24 · openalex publication_date 2018/06/18 · arxiv updated 2018/06/27 · openalex updated_date 2026/08/05

Abstract

We calculate the transport relaxation time \ensuremathτ_tr and spin transport relaxation time \ensuremathτ_s,tr for a two-dimensional electron gas with spatially fluctuating Rashba spin-orbit interaction. These relaxation times determine the electrical and spin conductivity of the two-dimensional system, respectively. It is shown that the transport relaxation time \ensuremathτ_tr is a nonmonotonic function of electron energy \ensuremathε, whereas the spin transport relaxation time \ensuremathτ_s,tr decreases with increasing \ensuremathε, similarly to the conventional electron relaxation time \ensuremathτ that characterizes the decay of an electron state corresponding to certain values of the momentum and spin. Such a behavior of the relaxation times leads to unusual temperature dependence of the electrical and spin conductivity.

Citations

• Modulated Rashba interaction in a quantum wire: Spin and charge dynamics
• Anomalous Hall effect
• Edge Dynamics in a Quantum Spin Hall State: Effects from Rashba Spin-Orbit Interaction
• Spintronics: Fundamentals and applications
• Universal Intrinsic Spin Hall Effect
• Proper Definition of Spin Current in Spin-Orbit Coupled Systems
• Nonexponential spin relaxation in magnetic fields in quantum wells with random spin-orbit coupling
• Spin‐orbit interaction in a two‐dimensional electron gas: A SU(2) formulation
• Density inhomogeneities and Rashba spin-orbit coupling interplay in oxide interfaces