Suppression of weak antilocalization in an Al_xGa_(1-x)N/GaN two-dimensional electron gas by an in-plane magnetic field

摘要

We studied the suppression of weak antilocalization in an Al_xGa_(1-x)N/GaN two-dimensional electron gas in the presence of an additional in-plane magnetic field. By comparing our experimental data to a theoretical model, we concluded that the suppression can be attributed mainly to the Zeeman effect, while the contribution due to disorder at the Al_xGa_(1-x)N/GaN heterointerface is considerably smaller. Furthermore, our results give further evidence for the value of spin-orbit scattering length determined from weak antilocalization measurements.