Theoretical study of electron mobility in a two-dimensional electron gas confined at a lattice-matched ZnSe-Zn(S,Te) heterointerface

A strain-free ZnSe-Zn(S,Te): x≊0.37 heterointerface is proposed as an ideal structure for the confinement of a two-dimensional electron gas in ZnSe. The electron mobilities were calculated for this structure for the first time, including all major scattering mechanisms, and considering both intra- and inter-subband scattering processes. The dependence of the electron mobility at both 4.2 and 77 K on the areal density in the well was calculated. The peak inherent mobility limit was found to be about 3×105 and about 1×104 cm2/V s at 4.2 and 77 K, respectively.