Volume 105, Number 3, February 2014
|Number of page(s)||6|
|Section||Condensed Matter: Electronic Structure, Electrical, Magnetic and Optical Properties|
|Published online||18 February 2014|
Randomly fluctuating potential-controlled multistable resonant tunneling current through a quantum dot
1 Institute of Applied Physics, Zhejiang University of Technology - Hangzhou 310023, China
2 Department of Physics, Zhejiang Normal University - Jinhua 321004, China
3 School of Economics and Management, Zhejiang Sci-Tech University - Hangzhou 310018, China
Received: 21 October 2013
Accepted: 22 January 2014
There is a long-standing controversy about the existence of more than one steady state in the transport through quantum dots and molecules. In this letter, we present a theory of the multiple steady states driven by randomly fluctuating potentials simulated by the autoregressive model. We find two general conditions under which the steady states strongly depend on the history of the fluctuating potential: First, the fluctuating potential has a nonzero correlation time. Second, it is applied before the steady states are built up under the decoupled initial condition. Furthermore, we provide a way of controlling the stationary current by the correlation time and strength of the fluctuation.
PACS: 73.63.-b – Electronic transport in nanoscale materials and structures / 05.60.Gg – Quantum transport / 73.63.Kv – Quantum dots
© EPLA, 2014
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