2003/03/24 by E. V. Deviatov, A. Wurtz, A. Würtz +6 · 1 citation
Chemistry · Engineering · Mathematics · Physics and Astronomy · #Advancements in Semiconductor Devices and Circuit Design #Chemistry #Condensed matter physics #Electron #Enhanced Data Rates for GSM Evolution #Mathematics #Molecular Junctions and Nanostructures #Physics #Polarization (electrochemistry) #Quantum and electron transport phenomena #Quantum mechanics #Relaxation (psychology) #Sign (mathematics) #Spin diffusion #Spins #cond-mat.mes-hall
paper · pdf · doi:10.1103/physrevb.69.115330
Submitted to PRB
arxiv created 2003/03/24 · openalex publication_date 2004/03/24 · arxiv updated 2009/11/30 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
Using a quasi-Corbino geometry to directly study electron transport between spin-split edge states under high imbalance conditions, we find a pronounced hysteresis in the I\ensuremath-V curves originating from dynamic nuclear polarization near the sample edge. Already in the simplest case of filling factor \ensuremathν=2 we observe a complicated relaxation, depending on the sign of the electrochemical potential difference. The characteristic relaxation times are about 25 s and 200 s, which points to the presence of two different relaxation mechanisms. The two time constants are ascribed to the formation of a local nuclear polarization due to flip-flop processes and the diffusion of nuclear spins.