Berlin 2018 – wissenschaftliches Programm

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TT: Fachverband Tiefe Temperaturen

TT 98: Poster Session: Superconductivity

TT 98.5: Poster

Donnerstag, 15. März 2018, 15:00–19:00, Poster B

Growth and Characterizations of Superconducting In_xSn_1−xTe Nanomaterials — •Zhiwei Wang, Felix Münning, Mengmeng Bai, Fan Yang, and Yoichi Ando — Institute of Physics II, University of Cologne, D-50937 Cologne, Germany

In recent years, possible existence of Majorana fermion (MF) in condensed matter has attracted extensive interest because of the potential application of MFs to the realization of topological quantum computation. So far, several strategies have been proposed to create and manipulate MFs based on nanowires of topological insulators (TI) and topological superconductors (TSC) [1-2]. In this contribution, we reported the nanomaterial growth and characterizations of one of the candidate TSCs, In_xSn_1−xTe (IST). Nanowires and nanoflakes of IST are grown on SiO₂/Si wafer by using a vapour transport method in sealed quartz tubes with and without gold catalyst. Growth parameters such as the composition of source materials, source temperature, temperature gradient and growth time are optimized to obtain expected nanowires and nanoflakes. Scanning electron microscopy (SEM) and energy-dispersive X-ray spectroscopy (EDX) are used to investigate the morphology and composition of as-grown nanomaterials. For electronic transport characterization, devices based on nanowires and nanoflakes are fabricated by e-beam lithography and photo-lithography, respectively. Electronic transport properties are measured on helium-3 cryostat with the temperature down to 0.3 K.
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