Behaviour of the current in a two-dimensional Bttiker Landauer motor with entropic barriers |
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引用本文: | 刘久亮,何济洲.Behaviour of the current in a two-dimensional Bttiker Landauer motor with entropic barriers[J].中国物理 B,2010,19(3):30504-030504. |
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作者姓名: | 刘久亮 何济洲 |
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作者单位: | Department of Physics, Nanchang University, Nanchang 330031, China |
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基金项目: | 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). |
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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.
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关 键 词: | Brownian Büttiker-Landauer(BL) motor entropic barrier transport properties |
收稿时间: | 2009-07-14 |
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