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.
Digital Commons Citation
Chen, Jun; Yu, Peng; Stenger, John; Hocevar, Moïra; Car, Diana; Plissard, Sébastien R.; Bakkers, Erik P. A. M.; Stanescu, Tudor D.; and Frolov, Sergey M., "Experimental Phase Diagram Of Zero-Bias Conductance Peaks In Superconductor/Semiconductor Nanowire Devices" (2017). Faculty Scholarship. 531.
Chen, Jun., Yu, Peng., Stenger, John., Hocevar, Moïra., Car, Diana., Plissard, Sébastien R.,… Frolov, Sergey M. (2017). Experimental Phase Diagram Of Zero-Bias Conductance Peaks In Superconductor/Semiconductor Nanowire Devices. Science Advances, 3(9), E1701476. http://doi.org/10.1126/Sciadv.1701476