High magnetic field investigations of quantum dots |
| |
Affiliation: | 1. Dept. of Electronics & Communication Engineering, Amity University Madhya Pradesh, Maharajpura Dang, Gwalior, MP 474005, India;2. MEMS and Microsensor Group, CEERI, Pilani, Rajasthan, India;1. School of Physics and Technology, Center for Nanoscience and Nanotechnology, and Key Laboratory of Artificial Micro- and Nano-structures of Ministry of Education, Wuhan University, Wuhan, 430072, China;2. Department of Physics, Duke University, Durham, NC 27708, USA;3. D-Wave Systems Inc., 3033 Beta Avenue, Burnaby, British Columbia, V5G 4M9, Canada |
| |
Abstract: | We have performed systematic investigations of the Coulomb blockade oscillations observed in a single quantum dot defined in the plane of a two-dimensional electron gas. At high magnetic fields these oscillations reflect the inner electronic structure of the dot, showing both a significant periodic amplitude modulation as well as a systematic variation of the conductance oscillation period. The former results from the modulation of the coupling of the electronic states in the dot with the leads, and can be readily explained within an activated transport model. The latter effect reflects the detailed electronic structure of the quantum dot and permits a comparison with the structure calculated within a simple capacitance model. The experimental results are in excellent qualitative agreement with the theoretical model, however a detailed quantitative comparison must include both the additional coupling of the dot to its environment as well as the gate voltage dependence of the dot structure itself.PACS: 73.20.Dx; 72.20. My. |
| |
Keywords: | |
本文献已被 ScienceDirect 等数据库收录! |
|