Av. Chernenko et al., MAGNETOLUMINESCENCE OF GE GESI STRUCTURES - NATURE OF LINES AND ROLE OF INTERFACE ROUGHNESS/, PHYSICS OF LOW-DIMENSIONAL STRUCTURES, 1-2, 1998, pp. 9-15
Photoluminescence spectra of Ge/Ge1-xSix multiple quantum well structu
res at liquid-helium temperatures in a magnetic field of up to 14 T ha
ve been measured for the first time. The value of well width fluctuati
ons has been estimated as 1-3 monolayers. The diamagnetic shift of pho
toluminescence lines has been observed. Its value allowed us to estima
te the in-plane size of exciton localization in Ge layers as similar t
o 80 Angstrom.