End-to-end correlated subgap states in hybrid nanowires
- G. L. R. Anselmetti ,
- E. A. Martinez ,
- G. C. Ménard ,
- D. Puglia ,
- F. K. Malinowski ,
- J. S. Lee ,
- S. Choi ,
- M. Pendharkar ,
- C. J. Palmstrøm ,
- Charles Marcus ,
- Lucas Casparis ,
- Andrew Higginbotham
Physical Review B | , Vol 100(20): pp. 205412
End-to-end correlated bound states are investigated in superconductor-semiconductor hybrid nanowires at zero magnetic field. Peaks in subgap conductance are independently identified from each wire end, and a cross-correlation function is computed that counts end-to-end coincidences, averaging over thousands of subgap features. Strong correlations in a short, 300-nm device are reduced by a factor of 4 in a long, 900-nm device. In addition, subgap conductance distributions are investigated, and correlations between the left and right distributions are identified based on their mutual information.