Title :
Quantum-coherent transport in coupled quantum-dots
Author :
Bird, J.P. ; Elhassan, M. ; Shailos, A. ; Prasad, C. ; Ferry, D.K. ; Aoki, N. ; Lin, L.-H. ; Ochiai, Y. ; Ishibashi, K. ; Aoyagi, Y.
Author_Institution :
Dept. of Electr. Eng., Arizona State Univ., Tempe, AZ, USA
Abstract :
The details of electron interference in quantum-dot systems coupled via quantum point contacts (QPCs) is studied via simulation and experiment. In both open and closed coupled systems, one sees transitions from multi- to single-dot behavior, even when the QPCs support several modes. The results also reveal a non-trivial scaling of the conductance fluctuations in quantum-dot arrays, arising from the influence of the inter-dot coupling on energy hybridization.
Keywords :
III-V semiconductors; Poisson equation; electric admittance; gallium arsenide; quantum point contacts; semiconductor quantum dots; GaAs; Poisson´s equation; QPCs; closed coupled system; conductance fluctuations; coupled quantum-dots; eigenstates; electron interference; energy hybridization; multi-single-dot behavior transition; nontrivial scaling; open coupled system; quantum point contacts; quantum-coherent transport; quantum-dot arrays; Contacts; Electrons; Fluctuations; Interference; Laboratories; Magnetic fields; Materials science and technology; Quantum dots; Reservoirs; Tunneling;
Conference_Titel :
Nanotechnology, 2002. IEEE-NANO 2002. Proceedings of the 2002 2nd IEEE Conference on
Print_ISBN :
0-7803-7538-6
DOI :
10.1109/NANO.2002.1032258
