Using first-principles methods, we investigate the structural and electronic properties of SiGe nanowiresbasedheterostructures, whose lattice contains the same number of Si and Ge atoms but arranged in a different manner. Our results demonstrate that the wires with a clear interface between Si and Ge regions not only form the most stable structures but show a strongly reduced quantum confinement effect. Moreover, we, with the inclusion of many-body effects, prove that these nanowires—under optical excitation—display a clear electron-holeseparation property which can have relevant technological applications.

Reduced quantum confinement effect and electron-hole separation in SiGe nanowires / Amato, Michele; M., Palummo; Ossicini, Stefano. - In: PHYSICAL REVIEW. B, CONDENSED MATTER AND MATERIALS PHYSICS. - ISSN 1098-0121. - STAMPA. - 79(2009), pp. 201302(R)-1-201302(R)-4.

Reduced quantum confinement effect and electron-hole separation in SiGe nanowires

AMATO, Michele;OSSICINI, Stefano
2009

Abstract

Using first-principles methods, we investigate the structural and electronic properties of SiGe nanowiresbasedheterostructures, whose lattice contains the same number of Si and Ge atoms but arranged in a different manner. Our results demonstrate that the wires with a clear interface between Si and Ge regions not only form the most stable structures but show a strongly reduced quantum confinement effect. Moreover, we, with the inclusion of many-body effects, prove that these nanowires—under optical excitation—display a clear electron-holeseparation property which can have relevant technological applications.
79
201302(R)-1
201302(R)-4
Reduced quantum confinement effect and electron-hole separation in SiGe nanowires / Amato, Michele; M., Palummo; Ossicini, Stefano. - In: PHYSICAL REVIEW. B, CONDENSED MATTER AND MATERIALS PHYSICS. - ISSN 1098-0121. - STAMPA. - 79(2009), pp. 201302(R)-1-201302(R)-4.
Amato, Michele; M., Palummo; Ossicini, Stefano
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/11380/615118
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