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

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

中国物理B ›› 2010, Vol. 19 ›› Issue (3): 30504-030504.doi: 10.1088/1674-1056/19/3/030504

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

刘久亮, 何济洲

Department of Physics, Nanchang University, Nanchang 330031, China

收稿日期:2009-07-14 修回日期:2009-08-17 出版日期:2010-03-15 发布日期:2010-03-15
基金资助:
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).

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

Liu Jiu-Liang(刘久亮) and He Ji-Zhou(何济洲)^†

Department of Physics, Nanchang University, Nanchang 330031, China

Received:2009-07-14 Revised:2009-08-17 Online:2010-03-15 Published:2010-03-15
Supported by:
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).

摘要/Abstract

摘要： 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.

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.

Key words: Brownian Büttiker--Landauer (BL) motor, entropic barrier, transport properties

中图分类号: (Brownian motion)

05.40.Jc

05.70.Ce (Thermodynamic functions and equations of state)

刘久亮, 何济洲. Behaviour of the current in a two-dimensional Büttiker－Landauer motor with entropic barriers[J]. 中国物理B, 2010, 19(3): 30504-030504.

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[J]. Chin. Phys. B, 2010, 19(3): 30504-030504.

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

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

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