Resistance Fluctuations in Composite Fermion State near Landau Level Filling Factor $ν= 1/2$ in A Square Quantum Well
| dc.creator | Zhang, Jian | |
| dc.creator | Du, R. R. | |
| dc.creator | Simmons, J. A. | |
| dc.creator | Reno, J. L. | |
| dc.date | 2008-08-29 | |
| dc.date.accessioned | 2026-07-07T09:59:31Z | |
| dc.date.available | 2026-07-07T09:59:31Z | |
| dc.description | We have studied the magnetotransport near Landau level filling factor $ν= 1/2$ in a GaAs-Al0.3Ga0.7As square quantum well (width 35 nm) in magnetic field up to 42 T and in a temperature range between 50 mK and 1.5 K. In low temperatures T < 200 mK, the Rxx exhibits a deep, strongly temperature-dependent minimum centered at $ν= 1/2$. The concomitant Rxy is not strictly linear with magnetic field (B) and the first derivative of Rxy with respect to B shows a sharp cusp at $ν= 1/2$, indicating a non-classical Hall effect. We verify these characteristics are being single-layer origin by applying an in-plane magnetic field or electrostatic gates. The data may signal frustrations in the composite fermion state towards $ν= 1/2$ pairing in the quantum well where the electron layer thickness far exceeds the magnetic length. | |
| dc.description | 15 pages, 3 figures | |
| dc.identifier | https://arxiv.org/abs/0808.4145 | |
| dc.identifier | http://arxiv.org/abs/0808.4145 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/168047 | |
| dc.subject | Mesoscale and Nanoscale Physics | |
| dc.title | Resistance Fluctuations in Composite Fermion State near Landau Level Filling Factor $ν= 1/2$ in A Square Quantum Well | |
| dc.type | text |