We show by first-principles calculations that, due to depressed screening and enhanced two-dimensional confinement, excitonic resonances with giant oscillator strength appear in hydrogenated Si and Ge layers, which qualitatively and quantitatively differ from those of graphane. Their large exciton binding energies and oscillator strengths make them promising for observation of novel physical effects and application in optoelectronic devices on the nanoscale. Copyright (C) EPLA, 2012

Pulci, O., Gori, P., Marsili, M., Garbuio, V., DEL SOLE, R., Bechstedt, F. (2012). Strong excitons in novel two-dimensional crystals: Silicane and germanane. EUROPHYSICS LETTERS, 98(3) [10.1209/0295-5075/98/37004].

Strong excitons in novel two-dimensional crystals: Silicane and germanane

PULCI, OLIVIA;MARSILI, MARGHERITA;DEL SOLE, RODOLFO;
2012-01-01

Abstract

We show by first-principles calculations that, due to depressed screening and enhanced two-dimensional confinement, excitonic resonances with giant oscillator strength appear in hydrogenated Si and Ge layers, which qualitatively and quantitatively differ from those of graphane. Their large exciton binding energies and oscillator strengths make them promising for observation of novel physical effects and application in optoelectronic devices on the nanoscale. Copyright (C) EPLA, 2012
2012
Pubblicato
Rilevanza internazionale
Articolo
Esperti anonimi
Settore FIS/03 - FISICA DELLA MATERIA
English
Con Impact Factor ISI
Pulci, O., Gori, P., Marsili, M., Garbuio, V., DEL SOLE, R., Bechstedt, F. (2012). Strong excitons in novel two-dimensional crystals: Silicane and germanane. EUROPHYSICS LETTERS, 98(3) [10.1209/0295-5075/98/37004].
Pulci, O; Gori, P; Marsili, M; Garbuio, V; DEL SOLE, R; Bechstedt, F
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/2108/104734
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