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Excitonic effects in the optical properties of CdSe nanowires

J. Vilhena, S. Botti, M. Marques

Applied Physics Letters, 96, 123106, (2010)

DOI: 10.1063/1.3368126

Download: BibTEX

Using a first-principle approach beyond density functional theory we calculate the electronic and optical properties of small diameter CdSe nanowires. Our results demonstrate how some approximations commonly used in bulk systems fail at this nanoscale level and how indispensable it is to include crystal local fields and excitonic effects to predict the unique optical properties of nanowires. From our results, we then construct a simple model to describe the optical gap as a function of the diameter of the wire, that turns out to be in excellent agreement with experiments for intermediate and large diameters.

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{"type":"article", "name":"j.vilhena20103", "author":"J. Vilhena and S. Botti and M. Marques", "title":"Excitonic effects in the optical properties of CdSe nanowires", "journal":"Applied Physics Letters", "volume":"96", "OPTnumber":"12", "OPTmonth":"3", "year":"2010", "OPTpages":"123106", "OPTnote":"", "OPTkey":"density functional theory; crystal structure; excitonic effects; quasiparticle; Doppler effect; nanowires; geometrical optics; optical properties; photoluminescence; GW-approximation", "DOI":"10.1063/1.3368126"}
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