کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1813895 | 1525249 | 2008 | 6 صفحه PDF | دانلود رایگان |

In this paper, we have investigated the threshold energy required for photoelectric emission of electrons from a torroidal quantum ring of degenerate narrow-gap semiconductor. Current density due to electrons emitted from the ring illuminated by normal radiation has been calculated considering the effect of band non-parabolicity of the narrow-gap semiconductor. The computed results show that the current density increases in a staircase manner with the increase of incident photon energy. The band non-parabolicity causes the increase in threshold energy for photoelectric emission of electrons. The photoemission becomes an oscillatory function of the cross-sectional radius of the ring, and may serve as an important tool for estimating parameters like cross-sectional radius, doping density and band non-parabolicity.
Journal: Physica B: Condensed Matter - Volume 403, Issues 19–20, 1 October 2008, Pages 3734–3739