Search for composite fermions at filling factor 5/2: Role of Landau level and subband index
Author(s): Mueed, MA; Kamburov, D; Hossain, Md Shafayat; Pfeiffer, LN; West, KW; et al
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Full metadata record
DC Field | Value | Language |
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dc.contributor.author | Mueed, MA | - |
dc.contributor.author | Kamburov, D | - |
dc.contributor.author | Hossain, Md Shafayat | - |
dc.contributor.author | Pfeiffer, LN | - |
dc.contributor.author | West, KW | - |
dc.contributor.author | Baldwin, KW | - |
dc.contributor.author | Shayegan, Mansour | - |
dc.date.accessioned | 2021-10-08T20:17:21Z | - |
dc.date.available | 2021-10-08T20:17:21Z | - |
dc.date.issued | 2017-04 | en_US |
dc.identifier.citation | Mueed, MA, Kamburov, D, Hossain, Md Shafayat, Pfeiffer, LN, West, KW, Baldwin, KW, Shayegan, M. (2017). Search for composite fermions at filling factor 5/2: Role of Landau level and subband index. Physical Review B, 95 (16), 10.1103/PhysRevB.95.165438 | en_US |
dc.identifier.issn | 2469-9950 | - |
dc.identifier.uri | http://arks.princeton.edu/ark:/88435/pr1bc5d | - |
dc.description.abstract | The pairing of composite fermions (CFs), i.e., electron-flux quasiparticles, is commonly proposed to explain the even-denominator fractional quantum Hall state observed at ν=5/2 in the first excited (N=1) Landau level (LL) of a two-dimensional electron system (2DES). While well established to exist in the lowest (N=0) LL, much is unknown about CFs in the N=1 LL. Here we carry out geometric resonance measurements to detect CFs at ν=5/2 by subjecting the 2DES to a one-dimensional density modulation. Our data, taken at a temperature of 0.3 K, reveal no geometric resonances for CFs in the N=1 LL. In stark contrast, we observe clear signatures of such resonances when ν=5/2 is placed in the N=0 LL of the antisymmetric subband by varying the 2DES width. This finding implies that the CFs' mean free path is significantly smaller in the N=1 LL compared to the N=0 LL. Our additional data as a function of in-plane magnetic field highlight the role of subband index and establish that CFs at ν=5/2 in the N=0 LL are more anisotropic in the symmetric subband than in the antisymmetric subband. | en_US |
dc.language.iso | en_US | en_US |
dc.relation.ispartof | Physical Review B | en_US |
dc.rights | Author's manuscript | en_US |
dc.title | Search for composite fermions at filling factor 5/2: Role of Landau level and subband index | en_US |
dc.type | Journal Article | en_US |
dc.identifier.doi | doi:10.1103/PhysRevB.95.165438 | - |
dc.date.eissued | 2017-04-21 | en_US |
dc.identifier.eissn | 2469-9969 | - |
pu.type.symplectic | http://www.symplectic.co.uk/publications/atom-terms/1.0/journal-article | en_US |
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