Behaviour of the current in a two-dimensional Büttiker－Landauer motor with entropic barriers

doi:10.1088/1674-1056/19/3/030504

Abstract The behaviour of the current in a two-dimensional Büttiker--Landauer motor, which is a position-dependent temperature-driven Brownian motor, is investigated in the presence of entropic and energy barriers. It is found that the motion of the Brownian particles is influenced by the shape of the channel. The existence of an entropic barrier can cause an asymmetric current as the flatness ratio of the shape varies. There exists an optimized flatness ratio (nonzero) at which the current reaches its maximum value.

Keywords: Brownian Büttiker--Landauer (BL) motor entropic barrier transport properties

Received: 14 July 2009
Revised: 17 August 2009
Accepted manuscript online:

PACS:	05.40.Jc	(Brownian motion)
	05.70.Ce	(Thermodynamic functions and equations of state)

Fund: Project supported by the National Natural Science Foundation of China (Grant No. 10765004), and the Science and Technology Foundation of Jiangxi Education Bureau, China (Grant No. 2006-13).

Cite this article:

Liu Jiu-Liang(刘久亮) and He Ji-Zhou(何济洲) Behaviour of the current in a two-dimensional Büttiker－Landauer motor with entropic barriers 2010 Chin. Phys. B 19 030504

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Behaviour of the current in a two-dimensional Büttiker－Landauer motor with entropic barriers

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