2006/03/23 by Branislav K. Nikolic, Branislav K. Nikolić, Liviu P. Zârbo +1 · 2 citations
Physics and Astronomy · #Condensed matter physics #Conductance #Electron #Hall effect #Magnetic field #Magnetic properties of thin films #Magnetoresistance #Mesoscopic physics #Physics #Physics of Superconductivity and Magnetism #Quantum Hall effect #Quantum and electron transport phenomena #Quantum mechanics #Scattering #Spin (aerodynamics) #Spin Hall effect #Spin polarization #Weak localization #cond-mat.dis-nn #cond-mat.mes-hall
paper · pdf · doi:10.1209/0295-5075/77/47004
published as Europhys. Lett. 77, 47004 (2007). · 5 pages, 3 color EPS figures
arxiv created 2006/03/23 · openalex publication_date 2007/02/01 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
We show that pure spin Hall current, flowing out of a four-terminal two-dimensional electron gas (2DEG) within inversion asymmetric heterostructure, contains contributions from both the extrinsic mechanisms (spin-orbit-dependent scattering off impurities) and the intrinsic ones (due to the Rashba coupling). The extrinsic contribution vanishes in the weakly and strongly disordered limits, and the intrinsic one dominates in the quasiballistic limit. However, in the crossover transport regime the spin Hall conductance is not simply reducible to either of the two mechanisms, which can be relevant for interpretation of experiments on dirty 2DEGs (Sih V. et al. , Nature Phys. , 1 (2005) 31). We also predict sample-to-sample mesoscopic fluctuations, and even sign change, of both the spin Hall conductance and the applied voltages to transverse terminals (ensuring that spin Hall current outflowing through them is pure with no accompanied net charge current) in phase-coherent bars.