| Автор | Arne Brataas |
| Автор | Vidar Gudmundsson |
| Автор | A G Mal'shukov |
| Автор | K A Chao |
| Дата выпуска | 1998-05-18 |
| dc.description | We study an interacting electron gas parabolically confined to a quantum wire in a perpendicular magnetic field. We consider the case of more than one subband occupied in the ground state. The intersubband spin-density excitations are calculated within the Hartree-Fock random-phase approximation. Similarly to the case in the absence of a magnetic field, vertex corrections to the electron spin polarizability are important, leading to collective spin-density excitations red-shifted with respect to the Hartree-Fock single-particle energies. In a finite magnetic field, the triplet of spin-density excitations splits. The splitting is at its maximum if the chemical potential is in between the bottom of a spin-up subband and the bottom of a spin-down subband, when the g-factor is greatly enhanced due to the exchange interaction. |
| Формат | application.pdf |
| Издатель | Institute of Physics Publishing |
| Название | Collective intersubband spin-density excitations in a quantum wire in a magnetic field |
| Тип | paper |
| DOI | 10.1088/0953-8984/10/19/014 |
| Electronic ISSN | 1361-648X |
| Print ISSN | 0953-8984 |
| Журнал | Journal of Physics: Condensed Matter |
| Том | 10 |
| Первая страница | 4267 |
| Последняя страница | 4279 |
| Выпуск | 19 |
