Quantum Hall ferromagnets, cooperative transport anisotropy, and the random field Ising model
We discuss the behaviour of a quantum Hall system when two Landau levels with opposite spin and combined filling factor near unity are brought into energetic coincidence using an in-plane component of magnetic field. We focus on the interpretation of recent experiments under these conditions [Zeitle...
| প্রধান লেখক: | , , , , |
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| বিন্যাস: | Journal article |
| ভাষা: | English |
| প্রকাশিত: |
2002
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| _version_ | 1826290021465849856 |
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| author | Chalker, J Polyakov, D Evers, F Mirlin, A Woelfle, P |
| author_facet | Chalker, J Polyakov, D Evers, F Mirlin, A Woelfle, P |
| author_sort | Chalker, J |
| collection | OXFORD |
| description | We discuss the behaviour of a quantum Hall system when two Landau levels with opposite spin and combined filling factor near unity are brought into energetic coincidence using an in-plane component of magnetic field. We focus on the interpretation of recent experiments under these conditions [Zeitler et al, Phys. Rev. Lett. 86, 866 (2001); Pan et al, Phys. Rev. B 64, 121305 (2001)], in which a large resistance anisotropy develops at low temperatures. Modelling the systems involved as Ising quantum Hall ferromagnets, we suggest that this transport anisotropy reflects domain formation induced by a random field arising from isotropic sample surface roughness. |
| first_indexed | 2024-03-07T02:37:49Z |
| format | Journal article |
| id | oxford-uuid:a96160c7-e084-4ca0-aad6-625e573b78e5 |
| institution | University of Oxford |
| language | English |
| last_indexed | 2024-03-07T02:37:49Z |
| publishDate | 2002 |
| record_format | dspace |
| spelling | oxford-uuid:a96160c7-e084-4ca0-aad6-625e573b78e52022-03-27T03:08:06ZQuantum Hall ferromagnets, cooperative transport anisotropy, and the random field Ising modelJournal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:a96160c7-e084-4ca0-aad6-625e573b78e5EnglishSymplectic Elements at Oxford2002Chalker, JPolyakov, DEvers, FMirlin, AWoelfle, PWe discuss the behaviour of a quantum Hall system when two Landau levels with opposite spin and combined filling factor near unity are brought into energetic coincidence using an in-plane component of magnetic field. We focus on the interpretation of recent experiments under these conditions [Zeitler et al, Phys. Rev. Lett. 86, 866 (2001); Pan et al, Phys. Rev. B 64, 121305 (2001)], in which a large resistance anisotropy develops at low temperatures. Modelling the systems involved as Ising quantum Hall ferromagnets, we suggest that this transport anisotropy reflects domain formation induced by a random field arising from isotropic sample surface roughness. |
| spellingShingle | Chalker, J Polyakov, D Evers, F Mirlin, A Woelfle, P Quantum Hall ferromagnets, cooperative transport anisotropy, and the random field Ising model |
| title | Quantum Hall ferromagnets, cooperative transport anisotropy, and the
random field Ising model |
| title_full | Quantum Hall ferromagnets, cooperative transport anisotropy, and the
random field Ising model |
| title_fullStr | Quantum Hall ferromagnets, cooperative transport anisotropy, and the
random field Ising model |
| title_full_unstemmed | Quantum Hall ferromagnets, cooperative transport anisotropy, and the
random field Ising model |
| title_short | Quantum Hall ferromagnets, cooperative transport anisotropy, and the
random field Ising model |
| title_sort | quantum hall ferromagnets cooperative transport anisotropy and the random field ising model |
| work_keys_str_mv | AT chalkerj quantumhallferromagnetscooperativetransportanisotropyandtherandomfieldisingmodel AT polyakovd quantumhallferromagnetscooperativetransportanisotropyandtherandomfieldisingmodel AT eversf quantumhallferromagnetscooperativetransportanisotropyandtherandomfieldisingmodel AT mirlina quantumhallferromagnetscooperativetransportanisotropyandtherandomfieldisingmodel AT woelflep quantumhallferromagnetscooperativetransportanisotropyandtherandomfieldisingmodel |