He worked first at the
Jülich Research Centre (1986-1991) and at
Bell Labs as visiting research fellow in 1988. He then became professor at the
École Polytechnique Fédérale de Lausanne in 1991. Since 1998, he is one of the directors of the
Max Planck Institute for Solid State Research in
Stuttgart. , his
h-index is 132 according to
Google Scholar. ==Awards==