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Phys. Rev. B 65, 233304 (2002) [4 pages]

Spin polarization of fractional quantum Hall edge channels studied by dynamic nuclear polarization

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T. Machida*, S. Ishizuka, T. Yamazaki, and S. Komiyama*
Department of Basic Sciences, University of Tokyo, Komaba 3-8-1-16-622, Meguro-ku, Tokyo 153-8902, Japan

K. Muraki and Y. Hirayama
NTT Basic Research Laboratories, NTT Corporation, 3-1 Morinosato-Wakamiya, Atsugi, Kanagawa 243-0198, Japan

Received 2 April 2002; published 24 May 2002

We find that the scattering between unequally populated fractional quantum Hall (FQH) edge channels (EC’s) polarizes nuclear spins through the hyperfine interaction. This dynamic nuclear polarization (DNP) is evidenced by the nuclear magnetic resonance detected via the transport through FQH EC’s. Spin polarizations of different FQH EC’s are inferred from the polarity of DNP.

© 2002 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevB.65.233304
DOI:
10.1103/PhysRevB.65.233304
PACS:
73.43.-f, 76.60.-k

*Also at Core Research for Evolutional Science and Technology, Japan Science and Technology Corporation (CREST-JST).