2007/12/20 by Minoru Kawamura, Hiroyuki Takahashi, Satoru Masubuchi +4 · 6 citations
Chemistry · Physics and Astronomy · #Advanced Physical and Chemical Molecular Interactions #Biasing #Conductor #Hall effect #Polarization (electrochemistry) #Quantum #Quantum Hall effect #Quantum and electron transport phenomena #Spins #Topological Materials and Phenomena #Voltage #cond-mat.mes-hall
paper · pdf · doi:10.1143/jpsj.77.023710
published in Journal of the Physical Society of Japan 77(2), 023710 (Physical Society of Japan) · 3 pages, 4 figures
arxiv created 2007/12/20 · openalex publication_date 2008/02/12 · arxiv updated 2015/05/12 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/08
Electrical polarization of nuclear spins is studied in a Corbino disk under a breakdown regime of the quantum Hall effect (QHE). Since the edge channels are completely absent in the Corbino disk, we conclude that the electric current flowing in the bulk channel of a quantum Hall conductor is relevant to dynamic nuclear polarization (DNP). A pump and probe measurement demonstrates that DNP emerges near the critical voltage of the QHE breakdown. The agreement of the onset voltage of DNP with that of the QHE breakdown indicates that the underlying origin of DNP is closely related to that of the QHE breakdown.