Spectroscopic determination of the order parameter of coupled bilayers at =1
| Autor: | Aron Pinczuk, Loren Pfeiffer, Stefano Luin, Brian S. Dennis, Ken W. West, Vittorio Pellegrini |
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| Přispěvatelé: | Luin, Stefano, Pellegrini, V, Pinczuk, A, Dennis, B, Pfeiffer, Ln, West, Kw |
| Rok vydání: | 2006 |
| Předmět: |
Physics
Phase transition Condensed matter physics Filling factor Electron quantum hall effect light scattering coupled bilayers Quantum Hall effect Inelastic scattering Condensed Matter::Mesoscopic Systems and Quantum Hall Effect Condensed Matter Physics Atomic and Molecular Physics and Optics Electronic Optical and Magnetic Materials Magnetic field Condensed Matter::Strongly Correlated Electrons Ground state Quantum tunnelling |
| Zdroj: | Physica E: Low-dimensional Systems and Nanostructures. 34:244-247 |
| ISSN: | 1386-9477 |
| Popis: | We report inelastic light scattering measurements of spin excitations on coupled electron bilayers with relatively large tunneling gaps at total filling factor nu(T) = 1. We show that the pseudospin polarization order parameter, where the pseudospin labels the occupation of symmetric and antisymmetric levels, can be determined from the energy of long wavelength spin excitations. Our experiments indicate that the order parameter in the quantum Hall ground state collapses at the incompressible-compressible phase transition. The latter is driven by decreasing the tunneling gap through the application of an in-plane magnetic field. (c) 2006 Elsevier B.V. All rights reserved. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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