Our research focuses on electrons, and especially on missing electrons (usually referred to as holes) in one- and two-dimensional semiconductor devices. In our lab, we study holes in Germanium confined into two dimensions. The confinement of the valence band states is achieved by growing a heterostructure of SiGe barriers sandwiching the Ge quantum well. The emerging states posses a - compared to valence band states in other materials - unusually small effective mass, which facilitates the confinement into lower dimensions by means of local topgate electrodes.
When confined into quantum dots, the discrete zeeman-split states are used to encode the two states of a qubit. Within the NCCR SPIN project, we aim at understanding the characteristics of these discrete states so as to build fast qubits with low decoherence.
Super/Semi hybrid devices
We are always looking for excellent and motivated people at all academic stages. For applying, please send an email to A. Hofmann with your grades, your CV, your publications and/or a thesis, the contact details of one to three references and a short motivation stating your interest in working in our group.