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Low-energy electronic spin excitations between filling factors nu=1 and 1/2 studies by optically detected nuclear magnetic resonance

Abstract:

We report measurements of the spin relaxation time (Tln) for nuclei in the potential well confining a high-mobility two-dimensional electron system at a single GaAs-GaAlAs heterojunction. At low temperatures nuclear spin relaxation is dominated by electron-nuclear spin scattering: we find that Tln displays sharp maxima at incompressible states throughout the v = 2/3 hierarchy of the fractional quantum Hall effect. This behaviour is consistent with the existence of low-energy spin excitations ...

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Publication status:
Published

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Authors


Brockbank, RL More by this author
Davies, HDM More by this author
More by this author
Institution:
University of Oxford
Department:
Oxford, MPLS, Physics, Condensed Matter Physics
Thomson, MA More by this author
More by this author
Institution:
University of Oxford
Department:
Oxford, MPLS, Physics, Condensed Matter Physics
Publisher:
Elsevier Sci B.V.
Journal:
PHYSICA E
Volume:
6
Issue:
1-4
Pages:
56-59
Publication date:
2000-02-05
DOI:
ISSN:
1386-9477
URN:
uuid:d8f3a7f5-6b37-4603-87c6-3aadcd6b2549
Source identifiers:
1964
Local pid:
pubs:1964
Language:
English
Keywords:

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