ABSTRACT
Cubic GaN has attracted much attention due to its potential for easy cleavage and higher mobility in comparison with the hexagonal counterpart. Its growth, however, is not very easy because hexagonal phase and stacking faults may be inevitably incorporated depending on the detailed growth conditions due to the metastability of cubic phase GaN. Recently, there are some reports on the effort to get a high-optical-quality cubic GaN layer [1], and the optically pumped stimulated emission from cubic GaN/AlGaN double heterostructure was achieved [2,3]. So these results will indicate that cubic GaN is the candidate for optical devices especially in blue and ultra violet spectral region along with hexagonal one. But in spite of the many reports on the structural and optical properties of cubic GaN/GaAs(001), still only a few studies on the carrier transport property has been reported [4-6].
