| Автор | S K Greene |
| Автор | M Pepper |
| Автор | D C Peacock |
| Автор | D A Ritchie |
| Автор | V J Law |
| Автор | R Newbury |
| Автор | J E F Frost |
| Автор | G A C Jones |
| Автор | R J Brown |
| Автор | H Ahmed |
| Автор | D Hasko |
| Дата выпуска | 1991-02-25 |
| dc.description | High 2D electron mobility narrow Hall bars, 0.8 mu m wide by 30 mu m long, were fabricated in which, after photoexcitation, the scattering mean free path was up to 4.5 mu m long at 1.3 K. The low field negative magnetoresistance arises from quantum interference (weak localization) with the flux cancellation mechanism absent, even though the mean free path is much greater than the width. The Landau levels are significantly broadened, implying that a flat-bottomed model potential is inappropriate in this particular case. It is suggested that the potential fluctuations giving rise to the broadening are responsible for the absence of the flux cancellation, and when small angle scattering contributes to the elastic mean free path. The value of this length compared with the width is no longer a sufficient criterion for the determination of the nature of the magnetoresistance. |
| Формат | application.pdf |
| Издатель | Institute of Physics Publishing |
| Название | Quantum interference and Landau level broadening in narrow GaAs-AlGaAs channels |
| Тип | paper |
| DOI | 10.1088/0953-8984/3/8/013 |
| Electronic ISSN | 1361-648X |
| Print ISSN | 0953-8984 |
| Журнал | Journal of Physics: Condensed Matter |
| Том | 3 |
| Первая страница | 1003 |
| Последняя страница | 1010 |
| Аффилиация | S K Greene; Cavendish Lab., Cambridge Univ., UK |
| Аффилиация | M Pepper; Cavendish Lab., Cambridge Univ., UK |
| Аффилиация | D C Peacock; Cavendish Lab., Cambridge Univ., UK |
| Аффилиация | D A Ritchie; Cavendish Lab., Cambridge Univ., UK |
| Аффилиация | V J Law; Cavendish Lab., Cambridge Univ., UK |
| Аффилиация | R Newbury; Cavendish Lab., Cambridge Univ., UK |
| Аффилиация | J E F Frost; Cavendish Lab., Cambridge Univ., UK |
| Аффилиация | G A C Jones; Cavendish Lab., Cambridge Univ., UK |
| Аффилиация | R J Brown; Cavendish Lab., Cambridge Univ., UK |
| Аффилиация | H Ahmed; Cavendish Lab., Cambridge Univ., UK |
| Аффилиация | D Hasko; Cavendish Lab., Cambridge Univ., UK |
| Выпуск | 8 |
