Optical Spectroscopy of Negative-U Centers (CROSBI ID 472599)
Prilog sa skupa u zborniku | sažetak izlaganja sa skupa | međunarodna recenzija
Podaci o odgovornosti
Crljen, Željko
engleski
Optical Spectroscopy of Negative-U Centers
The identification of strongly correlated double electron local sites in semiconductors usually requires a nonequilibrium situation in order to observe a single occupied state of a local site. We present a way of a direct observation of negative-U centers by means of a, single photon optical transition from band states into local states provided controlled occupancy of local levels via doping the semiconductor or via change of the gate voltage. The photoabsorption spectrum shows single and double electron transitions as the consequence of the hybridization of local states and band electron states. The value of the correlation energy in localized states determine positions and intensities of peaks while the occupancy of local levels reflects itself in the line shape. A qualitative comparison with available data on installed atoms as possible double electron centers in semiconductors is made.
Negative-U centers; Photoabsorption
nije evidentirano
nije evidentirano
nije evidentirano
nije evidentirano
nije evidentirano
nije evidentirano
Podaci o prilogu
Posters-Session-x.
1999.
objavljeno
Podaci o matičnoj publikaciji
Podaci o skupu
Int.Conf.on Strongly Coupled Coulomb Systems (SCCS99)
poster
04.09.1999-10.09.1999
Saint-Malo, Francuska