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Experimental phase diagram of zero-bias conductance peaks in superconductor/semiconductor nanowire devices

Abstract : Topological superconductivity is an exotic state of matter characterized by spinless p-wave Cooper pairing of electrons and by Majorana zero modes at the edges. The first signature of topological superconductivity is a robust zero-bias peak in tunneling conductance. We perform tunneling experiments on semiconductor nanowires (InSb) coupled to superconductors (NbTiN) and establish the zero-bias peak phase in the space of gate voltage and external magnetic field. Our findings are consistent with calculations for a finite-length topological nanowire and provide means for Majorana manipulation as required for braiding and topological quantum bits.
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Submitted on : Tuesday, June 25, 2019 - 3:14:21 PM
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Jun Chen, Peng Yu, John Stenger, Moïra Hocevar, Diana Car, et al.. Experimental phase diagram of zero-bias conductance peaks in superconductor/semiconductor nanowire devices. Science Advances , American Association for the Advancement of Science (AAAS), 2017, 3 (9), pp.1701476. ⟨10.1126/sciadv.1701476⟩. ⟨hal-01712993⟩

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