Spin-polarized transport current in<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi>n</mml:mi></mml:math>-type codoped ZnO thin films measured by Andreev spectroscopyK. A. Yates, L. F. Cohen, James R. Neal et al.|Physical Review B|2009Cited by 12