Journal
PHYSICS LETTERS A
Volume 376, Issue 45, Pages 3287-3289Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.physleta.2012.09.038
Keywords
First-principles calculations; ZnO monolayer; Band structure; Biaxial strains
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We present ab initio calculations which show that the direct-band-gap, effective masses and Fermi velocities of charge carriers in ZnO monolayer (ML-ZnO) in graphene-like honeycomb structure are all tunable by application of in-plane homogeneous biaxial strain. Within our simulated strain limit of +/- 10%. the band gap remains direct and shows a strong non-linear variation with strain. Moreover, the average Fermi velocity of electrons in unstrained ML-ZnO is of the same order of magnitude as that in graphene. The results promise potential applications of ML-ZnO in mechatronics/straintronics and other nano-devices such as the nano-electromechanical systems (NEMS) and nano-optomechanical systems (NOMS). (C) 2012 Elsevier B.V. All rights reserved.
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