dc.contributor.author | Apalkov, V.M. | en_GB |
dc.contributor.author | Portnoi, M.E. | en_GB |
dc.date.accessioned | 2013-01-08T11:56:19Z | en_GB |
dc.date.accessioned | 2013-03-20T13:03:08Z | |
dc.date.issued | 2002 | en_GB |
dc.description.abstract | In this work we study the properties of a two-subband quasi-two-dimensional electron system in a strong magnetic field when the electron filling factor is equal to 4. When the cyclotron energy is close to the intersubband splitting the system can be mapped onto a four-level electron system with an effective filling factor of 2. The ground state is either a ferromagnetic state or a spin-singlet state, depending on the values of the interlevel splitting and Zeeman energy. The boundaries between these phases are strongly influenced by the interelectron interaction. A significant exchange-mediated enhancement of the excitation gap results in the suppression of the electron-phonon interaction. The rate of absorption of nonequilibrium phonons is calculated as a function of Zeeman energy and intersubband splitting. The phonon absorption rate has two peaks as a function of intersubband splitting and has a steplike structure as a function of Zeeman energy. | en_GB |
dc.identifier.citation | Vol. 65 (12), article 125310 | en_GB |
dc.identifier.doi | 10.1103/PhysRevB.65.125310 | en_GB |
dc.identifier.uri | http://hdl.handle.net/10036/4124 | en_GB |
dc.language.iso | en | en_GB |
dc.publisher | American Physical Society | en_GB |
dc.relation.url | http://link.aps.org/doi/10.1103/PhysRevB.65.125310 | en_GB |
dc.relation.url | http://dx.doi.org/10.1103/PhysRevB.65.125310 | en_GB |
dc.title | Tuning gaps and phases of a two-subband system in a quantizing magnetic field | en_GB |
dc.type | Article | en_GB |
dc.date.available | 2013-01-08T11:56:19Z | en_GB |
dc.date.available | 2013-03-20T13:03:08Z | |
dc.identifier.issn | 1095-3795 | en_GB |
dc.description | Copyright © 2002 The American Physical Society | en_GB |
dc.identifier.eissn | 1550-235X | en_GB |
dc.identifier.journal | Physical Review B: Condensed Matter and Materials Physics | en_GB |