Affiliation: | 1.Department of Physics, Technical University of Denmark, Bldg. 307, DK-2800, Kgs. Lyngby, Denmark ;2.Materials Research Department, Ris? National Laboratory, DK-4000, Roskilde, Denmark ;3.Mikroelektronik Centret, Technical University of Denmark, Bldg. 345E, DK-2800, Kgs. Lyngby, Denmark ; |