abstract 14 October 2015

Materials for braiding majorana bound states

Peter Krogstrup, Center of Quantuam Devices, Niels Bohr Institute, University of Copenhagen

Semiconductor-metal interfaces are key elements in nanostructured electronics and device architectures. This is in particular true in the field of low dimensional topological superconductivity, where semiconductor nanowires with high spin orbit coupling coupled to a superconducting phase constitute some of the most promising candidates in the search for materials suitable for quantum computing. For this reason we focus on epitaxially grown InAs//Al and InSb//Al hybrid crystals, which we show can form highly ordered interfacial domain matching that results in a low density of states in the induced superconducting gap. However, making materials that allows controlled manipulation of the so-called majorana bound states (MBS) is not a straightforward task. I will discuss material requirements needed to go all the way to MBS braiding experiments in T shaped nanowire structures, and discuss different ways synthesize such materials using molecular beam epitaxy.



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