Growth and Characterization of Ge100-xDyx(x=2) Nano wires

Novel semiconducting Germanium-Dysprosium nano wires are fabricated by a combined two-step method, which consists of initial arc-melting of the elemental constituents into a pellet and its heat treatment, followed by thermal vapor transport of the powdered pellet in a tube reactor for fabrication of the nano wires. The nano materials are fabricated on gold nucleation seeds on Si/SiO2 substrates. The thermodynamic conditions in the reactor are carefully chosen to produce wires with diameters in a narrow, specific range. This nano fabrication method ensures high phase purity and crystallinity of nano wires. Based on the results and theoretical work, it is concluded that the fabricated Ge98Dy2 materials are in a glassy state below 20 K.