Electronic properties of one-dimensional systems with long-range correlated binary potentials

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Title:	Electronic properties of one-dimensional systems with long-range correlated binary potentials
Authors:	Gong, Long-yan;Tong, Pei-qing;Zhou, Zi-cong
Contributors:	淡江大學物理學系
Date:	2011-08
Issue Date:	2011-10-25
Publisher:	Institute of Physics Publishing (IOP)
Abstract:	We study numerically the electronic properties of one-dimensional systems with long-range correlated binary potentials. The potentials are mapped from binary sequences with a power-law power spectrum over the entire frequency range, which is characterized by correlation exponent β. We find the localization length ξ increases with β. At system sizes N → ∞, there are no extended states. However, there exists a transition at a threshold βc. When β > βc, we obtain ξ > 0. On the other hand, at finite system sizes, ξ ≥ N may happen at certain β, which makes the system "metallic", and the upper-bound system size N*(β) is given.
Relation:	Chinese Physics B 20(8), pp.087102
DOI:	10.1088/1674-1056/20/8/087102
Appears in Collections:	[Graduate Institute & Department of Physics] Journal Article

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