Closing of the induced gap in a hybrid superconductor-semiconductor nanowire
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We present conductance-matrix measurements in long, three-terminal hybrid superconductor-semiconductor nanowires, and compare with theoretical predictions of a magnetic-field-driven, topological quantum phase transition. By examining the nonlocal conductance, we identify the closure of the excitation gap in the bulk of the semiconductor before the emergence of zero-bias peaks, ruling out spurious gap-closure signatures from localized states. We observe that after the gap closes, nonlocal signals and zero-bias peaks fluctuate strongly at both ends, inconsistent with a simple picture of clean topological superconductivity.
Original language | English |
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Article number | 235201 |
Journal | Physical Review B |
Volume | 103 |
Issue number | 23 |
Number of pages | 9 |
ISSN | 2469-9950 |
DOIs | |
Publication status | Published - 8 Jun 2021 |
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