2014/10/13 by E. A. Rothstein, B. Horovitz, O. Entin‐Wohlman +3 · 2 citations
Engineering · Materials Science · Physics and Astronomy · #Charge (physics) #Condensed matter physics #Conductance #Current (fluid) #Electron #Electronic and Structural Properties of Oxides #Fermi gas #Noise (video) #Optics #Physics #Quantum and electron transport phenomena #Quantum mechanics #Relaxation (psychology) #Semiconductor materials and devices #Shot noise #Spin (aerodynamics) #cond-mat.mes-hall
paper · pdf · doi:10.1103/physrevb.90.245425
published in Physical Review B 90(24) (American Physical Society) · 14 pages,10 figures
arxiv created 2014/10/13 · openalex publication_date 2014/12/17 · arxiv updated 2014/12/24 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
The ac conductance of a finite tubular two-dimensional electron gas is studied in the presence of the Rashba spin-orbit interaction. When the tube is coupled to two reservoirs, that interaction splits the steps in the dc current, introducing energy ranges with spin-polarized currents. For this setup, we calculate the current-current correlations (the noise spectrum) and show that the existence of these dc spin-polarized currents can be deduced from the shot noise. We also find that the Wigner-Smith time delay is almost unaffected by the spin-orbit interaction. When the tube is coupled to a single reservoir, we calculate the quantum capacitance and the charge-relaxation resistance, and find that they exhibit singularities near the openings of new channels.