Jiang, H.X.Lin, J.Y.Nepal, N.Nakarmi, M.L.2011-07-202012-05-032011-07-202012-05-032005-06-20http://hdl.handle.net/2346/22937en-USUnintentionally Doped N-Type Al_.67_Ga_.33_N EpilayersApplied Physics Letters 86, 261902Article