We present the first experimental evidence for the breaking of the cubic sy
mmetry in the band structure of CdZnTe epilayers deposited by metal-organic
chemical vapor deposition (MOCVD). Polarized PL measurements along [110] a
nd [(1) over bar 10] directions were performed and the valence band splitti
ng (VBS) was determined. Growth conditions (growth temperature and partial
pressure ratio) and type and misorientation of the substrates an correlated
to the VBS of Cd1-xZnxTe epilayers. (C) 1998 Elsevier Science S.A. All rig
hts reserved.