Full parity phase diagram of a proximitized nanowire island
J. Shen (TU Delft - Architecture and the Built Environment, Chinese Academy of Sciences, Kavli institute of nanoscience Delft, TU Delft - QuTech Advanced Research Centre)
G. W. Winkler (University of California)
Francesco Borsoi (Kavli institute of nanoscience Delft, TU Delft - QCD/Veldhorst Lab, TU Delft - QuTech Advanced Research Centre)
S. Heedt (TU Delft - BUS/Quantum Delft, Microsoft Quantum Lab Delft, TU Delft - QuTech Advanced Research Centre, Kavli institute of nanoscience Delft)
V. Levajac (Kavli institute of nanoscience Delft, TU Delft - QuTech Advanced Research Centre, TU Delft - QRD/Kouwenhoven Lab)
Jinhu Wang (Kavli institute of nanoscience Delft, TU Delft - QuTech Advanced Research Centre, TU Delft - Optical and Laser Remote Sensing)
D. van Driel (Kavli institute of nanoscience Delft, TU Delft - QuTech Advanced Research Centre, TU Delft - QRD/Kouwenhoven Lab)
D. Bouman (TU Delft - BUS/Quantum Delft, TU Delft - QuTech Advanced Research Centre, Kavli institute of nanoscience Delft)
L.P. Kouwenhoven (TU Delft - QN/Kouwenhoven Lab, TU Delft - QuTech Advanced Research Centre, Microsoft Quantum Lab Delft, Kavli institute of nanoscience Delft)
B. van Heck (TU Delft - BUS/Quantum Delft, Microsoft Quantum Lab Delft)
G.B. More Authors (External organisation)
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Abstract
We measure the charge periodicity of Coulomb blockade conductance oscillations of a hybrid InSb-Al island as a function of gate voltage and parallel magnetic field. The periodicity changes from to at a gate-dependent value of the magnetic field, , decreasing from a high to a low limit upon increasing the gate voltage. In the gate voltage region between the two limits, which our numerical simulations indicate to be the most promising for locating Majorana zero modes, we observe correlated oscillations of peak spacings and heights. For positive gate voltages, the transition with low is due to the presence of nontopological states whose energy quickly disperses below the charging energy due to the orbital effect of the magnetic field. Our measurements highlight the importance of a careful exploration of the entire available phase space of a proximitized nanowire as a prerequisite to define future topological qubits.