Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/36017
Title: Tunable electronic and optical properties of monolayer silicane under tensile strain : a many-body study
Authors: Shu, HB
Wang, SD
Li, Y 
Yip, J 
Wang, JL
Issue Date: 2014
Publisher: American Institute of Physics
Source: Journal of chemical physics, 2014, v. 141, no. 6, 64707 How to cite?
Journal: Journal of chemical physics 
Abstract: The electronic structure and optical response of silicane to strain are investigated by employing first-principles calculations based on many-body perturbation theory. The bandgap can be efficiently engineered in a broad range and an indirect to direct bandgap transition is observed under a strain of 2.74%; the semiconducting silicane can even be turned into a metal under a very large strain. The transitions derive from the persistent downward shift of the lowest conduction band at the Gamma-point upon an increasing strain. The quasi-particle bandgaps of silicane are sizable due to the weak dielectric screening and the low dimension; they are rapidly reduced as strain increases while the exciton bound energy is not that sensitive. Moreover, the optical absorption edge of the strained silicane significantly shifts towards a low photon energy region and falls into the visible light range, which might serve as a promising candidate for optoelectronic devices.
URI: http://hdl.handle.net/10397/36017
ISSN: 0021-9606
EISSN: 1089-7690
DOI: 10.1063/1.4892110
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