Closing of the induced gap in a hybrid superconductor-semiconductor nanowire
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Closing of the induced gap in a hybrid superconductor-semiconductor nanowire. / Puglia, D.; Martinez, E. A.; Menard, G. C.; Poschl, A.; Gronin, S.; Gardner, G. C.; Kallaher, R.; Manfra, M. J.; Marcus, C. M.; Higginbotham, A. P.; Casparis, L.
In: Physical Review B, Vol. 103, No. 23, 235201, 08.06.2021.Research output: Contribution to journal › Journal article › Research › peer-review
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TY - JOUR
T1 - Closing of the induced gap in a hybrid superconductor-semiconductor nanowire
AU - Puglia, D.
AU - Martinez, E. A.
AU - Menard, G. C.
AU - Poschl, A.
AU - Gronin, S.
AU - Gardner, G. C.
AU - Kallaher, R.
AU - Manfra, M. J.
AU - Marcus, C. M.
AU - Higginbotham, A. P.
AU - Casparis, L.
PY - 2021/6/8
Y1 - 2021/6/8
N2 - 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.
AB - 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.
U2 - 10.1103/PhysRevB.103.235201
DO - 10.1103/PhysRevB.103.235201
M3 - Journal article
VL - 103
JO - Physical Review B
JF - Physical Review B
SN - 2469-9950
IS - 23
M1 - 235201
ER -
ID: 272509083