| Affiliation: | 1. L‐NESS and Dept. of Materials Science, Università degli Studi di Milano‐Bicocca, via Cozzi 53, I‐20125, Milano, Italy;2. L‐NESS and Dept. of Physics, Politecnico di Milano, via Anzani 42, I‐22100 Como, Italy;3. Institute of Semiconductor and Solid State Physics, Johannes Kepler University Linz Altenbergerstrasse 69, A‐4040 Linz, Austria;4. Electron Microscopy, ETH Zurich, Wolfgang Pauli Str. 16, CH‐8093 Zürich, Switzerland;5. Laboratory for Solid State Physics, ETH Zurich, Schafmattstr. 16, CH‐8093 Zürich, Switzerland;6. Centre Suisse d'Electronique et Microtechnique, Jaquet‐Droz 1, CH‐2002 Neuchatel, Switzerland |
