Abstract Simulations are performed on clusters of finite size to study the effects of size and current-path structure on magnetotransport in spatially-confined samples. Magnetotransport networks are established and calculated based on fractal structures including Koch curves and percolation backbones extracted from regular lattices. The structure pattern of clusters is shown to play an important role in the magnetotransport behaviours by affecting the magnetoresistance fluctuations due to spin disorder in the systems of small size, which suggests the possibility of controlling the magnetotransport by the design of current-path configurations.
Received: 28 March 2009
Revised: 20 April 2009
Accepted manuscript online:
PACS:
75.47.-m
(Magnetotransport phenomena; materials for magnetotransport)
Fund: Project supported by the National
Natural Science Foundation of China (Grant Nos 10774107, 10874126
and 10804080) and the Doctoral Program of High Education of China
(Grant No 20060285003).
Cite this article:
Wu Jian-Chun(伍建春), Sun Hua(孙华), and Li Zhen-Ya(李振亚) The effects of current-path patterns on magnetotransport in spatially-confined structures by Monte Carlo simulation 2009 Chin. Phys. B 18 5061
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