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Issue Eur. Phys. J. Appl. Phys.
Volume 37, Number 1, January 2007
Page(s) 11 - 13
Section Semiconductors and Related Materials
DOI 10.1051/epjap:2006155
Published online 20 December 2006

Eur. Phys. J. Appl. Phys. 37, 11-13 (2007)
DOI: 10.1051/epjap:2006155

Structure dependence of tunneling lifetimes in double-barrier structures

Hong-mei Wang and Ya-fei Zhang

Bio-X DNA Computer Consortium, National Key Laboratory of Nano/Micro Fabrication Technology, Key Laboratory for Thin Film and Microfabrication of Ministry of Education, Institute of Micro and Nano Science and Technology, Shanghai Jiao Tong University, Shanghai 200030, P.R. China

whmdr@hotmail.com
yfzhang@sjtu.edu.cn

(Received: 25 July 2006 / Received in final form: 29 September 2006 / Accepted: 3 October 2006 / Published online: 20 December 2006)

Abstract
It is known that the structure dependence of the lifetimes of quasi-bound states in rectangular multi-barrier structures is significant but still ambiguous. In this paper, we report the elaborate dependence of the lifetimes of higher quasi-bound states in symmetrical double-barrier structures on structure parameters, such as well width, barrier width and composition mole fraction. Based on the energy uncertainty condition at quasi-bound states method, numerical calculations are carried out to investigate the structure dependence of the lifetimes of higher quasi-bound states. The calculation results show that the lifetimes of higher quasi-bound states vary with structure parameters as a simple and exact function, and that the lifetimes of higher quasi-bound states increase exponentially with structure parameters.

PACS
73.21.Ac - Multilayers.
73.63.-b - Electronic transport in nanoscale materials and structures.

© EDP Sciences 2006


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