We show that the electronic and optical properties of silicon nanowires, with different size and orientation, are dominated by important many-body effects. The electronic and excitonic gaps, calculated within first-principles, agree with the available experimental data. Huge excitonic effects, which depend strongly on wire orientation and size, characterize the optical spectra. Modelling porous silicon as a collection of interacting nanowires, we find an absorption spectrum which is in very good agreement with experimental measurements only when the electron-hole interaction is included.

From Si Nanowires to Porous Silicon: The Role of Excitonic Effects / M., Bruno; M., Palummo; A., Marini; R., DEL SOLE; Ossicini, Stefano. - In: PHYSICAL REVIEW LETTERS. - ISSN 0031-9007. - STAMPA. - 98:3(2007), pp. 036807-1-036807-4. [10.1103/PhysRevLett.98.036807]

From Si Nanowires to Porous Silicon: The Role of Excitonic Effects

OSSICINI, Stefano
2007

Abstract

We show that the electronic and optical properties of silicon nanowires, with different size and orientation, are dominated by important many-body effects. The electronic and excitonic gaps, calculated within first-principles, agree with the available experimental data. Huge excitonic effects, which depend strongly on wire orientation and size, characterize the optical spectra. Modelling porous silicon as a collection of interacting nanowires, we find an absorption spectrum which is in very good agreement with experimental measurements only when the electron-hole interaction is included.
2007
98
3
036807-1
036807-4
From Si Nanowires to Porous Silicon: The Role of Excitonic Effects / M., Bruno; M., Palummo; A., Marini; R., DEL SOLE; Ossicini, Stefano. - In: PHYSICAL REVIEW LETTERS. - ISSN 0031-9007. - STAMPA. - 98:3(2007), pp. 036807-1-036807-4. [10.1103/PhysRevLett.98.036807]
M., Bruno; M., Palummo; A., Marini; R., DEL SOLE; Ossicini, Stefano
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11380/459187
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