| Autor: |
Banerjee, A., Lesser, O., Rahman, M. A., Thomas, C., Wang, T., Manfra, M. J., Berg, E., Oreg, Y., Stern, Ady, Marcus, C. M. |
| Rok vydání: |
2022 |
| Předmět: |
|
| Zdroj: |
Phys. Rev. Lett. 130, 096202 (2023) |
| Druh dokumentu: |
Working Paper |
| DOI: |
10.1103/PhysRevLett.130.096202 |
| Popis: |
We report simultaneously acquired local and nonlocal transport spectroscopy in a phase-biased planar Josephson junction based on an epitaxial InAs/Al hybrid two-dimensional heterostructure. Quantum point contacts at the junction ends allow measurement of the 2 x 2 matrix of local and nonlocal tunneling conductances as a function of magnetic field along the junction, phase difference across the junction, and carrier density. A closing and reopening of a gap was observed in both the local and nonlocal tunneling spectra as a function of magnetic field. For particular tunings of junction density, gap reopenings were accompanied by zero-bias conductance peaks (ZBCPs) in local conductances. End-to-end correlation of gap reopening was strong, while correlation of local ZBCPs was weak. A simple, disorder-free model of the device shows comparable conductance matrix behavior associated with a topological phase transition. Phase dependence helps distinguish possible origins of the ZBCPs. |
| Databáze: |
arXiv |
| Externí odkaz: |
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