TY - JOUR
T1 - Excitonic transitions and exchange splitting in Si quantum dots
AU - Reboredo, F. A.
AU - Franceschetti, A.
AU - Zunger, A.
PY - 1999/11/8
Y1 - 1999/11/8
N2 - In a quantum dot made of an indirect gap material such as Si, the electron-hole Coulomb interaction alone can give rise to "dark" excitons even in the absence of exchange interaction. We present the predicted excitonic spectra for hydrogen-passivated Si dots and find very good agreement with the recent experiment of Wolkin, Jorne, Fauchet, Allan, and Delerue [Phys. Rev. Lett. 82, 197 (1999)]. The calculated splitting between dark and bright excitons, arising from Coulomb and exchange interactions, agrees very well with the optical data of Calcott, Nash, Canham, Kane, and Drumhead [J. Phys Condens. Matter 5, L91 (1993)].
AB - In a quantum dot made of an indirect gap material such as Si, the electron-hole Coulomb interaction alone can give rise to "dark" excitons even in the absence of exchange interaction. We present the predicted excitonic spectra for hydrogen-passivated Si dots and find very good agreement with the recent experiment of Wolkin, Jorne, Fauchet, Allan, and Delerue [Phys. Rev. Lett. 82, 197 (1999)]. The calculated splitting between dark and bright excitons, arising from Coulomb and exchange interactions, agrees very well with the optical data of Calcott, Nash, Canham, Kane, and Drumhead [J. Phys Condens. Matter 5, L91 (1993)].
UR - http://www.scopus.com/inward/record.url?scp=0000702951&partnerID=8YFLogxK
U2 - 10.1063/1.125205
DO - 10.1063/1.125205
M3 - Article
AN - SCOPUS:0000702951
SN - 0003-6951
VL - 75
SP - 2972
EP - 2974
JO - Applied Physics Letters
JF - Applied Physics Letters
IS - 19
ER -