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Dirty quantum Hall ferromagnets and quantum Hall spin glasses

Abstract:

We study quantum Hall ferromagnets in the presence of a random electrostatic impurity potential, within the framework of a classical non-linear sigma model. We discuss the behaviour of the system using a heuristic picture for the competition between exchange and screening, and test our conclusions with extensive numerical simulations. We obtain a phase diagram for the system as a function of disorder strength and deviation of the average Landau level filling factor from unity. Screening of an...

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Publication status:
Published

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Publisher copy:
10.1103/PhysRevB.67.195322

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Institution:
University of Oxford
Division:
MPLS
Department:
Physics
Sub department:
Theoretical Physics
Role:
Author
Journal:
Phys Rev B
Volume:
67
Issue:
19
Pages:
195322
Publication date:
2002-10-19
DOI:
EISSN:
1095-3795
ISSN:
1098-0121
Source identifiers:
5231
Language:
English
Keywords:
Pubs id:
pubs:5231
UUID:
uuid:1c9014b2-8c3f-493b-8a47-a40df4e1ff12
Local pid:
pubs:5231
Deposit date:
2012-12-19

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