Anomalous k-dependent spin splitting in wurtzite AlxGa1-xN/GaN   heterostructures
  We have confirmed the k-dependent spin splitting in wurtzite AlxGa1-xN/GaN heterostructures. Anomalous beating pattern in Shubnikov-de Haas measurements arises from the interference of Rashba and Dresselhaus spin-orbit interactions. The dominant mechanism for the k-dependent spin splitting at high values of k is attributed to Dresselhaus term which is enhanced by the Delta C1-Delta C3 coupling of wurtzite band folding effect. 
Ikai Lo, M. H. Gau, J. K. Tsai, Y. L. Chen, Z. J. Chang, W. T. Wang,   J. C. Chiang, and T. Aggerstam