Affiliation: | aScience Institute, University of Iceland, Dunhaga 3, IS-107 Reykjavik, Iceland;bThin Film Physics, Department of Physics (IFM), Linköping University, Linköping SE-581 83, Sweden;cUniversity of Michigan—Shanghai Jiao Tong University Joint Institute, Shanghai Jiao Tong University, 800 Dong Chuan Road, Shanghai, 200240, China |