Optical and Acoustic Branches in the Vibrational Spectrum of a
Diatomic Penrose Lattice

Chin. Phys. Lett.

1993, Vol. 10

Issue (10): 601-604 DOI:

Original Articles

Optical and Acoustic Branches in the Vibrational Spectrum of a Diatomic Penrose Lattice

TIAN Decheng¹; LIU Zhengyou;JIANG Qing;WANG Lilong²

¹Department of Physics, Wuhan University, Wuhan 430072 also International Centre for Material Physics, Academia Sinica, Shenyang 110015 ²Computer Center, Wuhan an University, Wuhan 430072

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TIAN Decheng, LIU Zhengyou, JIANG Qing et al 1993 Chin. Phys. Lett. 10 601-604

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Abstract Vibrational densities of states for a diatomic Penrose lattice are calculated. They show apparently acoustic and optical branches. The acoustic branches appear smooth and continuous, while the optical branches are peakrich and have some small gaps. Detailed analysis shows that the density of states in the acoustic branches is attributed to the phonons and the fracton-like excitations and that in the optical branches clue to some localized vibrational model.

Keywords: 63.50.+x 63.20.Pw 61.42.+h

Published: 01 October 1993

PACS:	63.50.+x
	63.20.Pw	(Localized modes)
	61.42.+h

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https://cpl.iphy.ac.cn/ OR https://cpl.iphy.ac.cn/Y1993/V10/I10/0601

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	TIAN Decheng
	LIU Zhengyou
	JIANG Qing
	WANG Lilong

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