Pelucchi, E. and Rubini, S. and Bonanni, B. and Franciosi, A. and Peressi, M.

2001

Applied Physics Letters

Band discontinuities in ZnMgSe/ZnCdSe(001) lattice-matched heterostructures

Validated

()

78

11

We present experimental and theoretical studies of lattice-matched interfaces between Zn1-yMgySe and Zn1-xCdxSe wide-band gap semiconductors. Ab initio pseudopotential calculations predict lattice matching for y/x similar to1.6 and a valence band contribution to the band gap difference Q(upsilon) decreasing gradually from 0.34 to 0.27 with increasing x and y. Experimental x-ray diffraction and photoemission spectroscopy results are mostly consistent with such predictions, although non-negligible deviations of the band offsets from commutativity were observed for selected alloy compositions. (C) 2001 American Institute of Physics.