Toward Quantum Hall Effect in a Josephson Junction

• DOI: 10.1002/pssr.201800222
• Publication Date: 2018-07-05T15:41:04Z
• Authors: Stefano Guiducci; Matteo Carrega; Giorgio Biasiol; Lucia Sorba; Fabio Beltram; Stefan Heun
• Keywords: Supercurrent

Hybrid superconductor/semiconductor devices constitute a powerful platform where intriguing topological properties can be investigated. Here we present fabrication methods and analysis of Josephson junctions formed by high-mobility InAs quantum-well bridging two Nb superconducting contacts. We demonstrate supercurrent flow with transport measurements, critical temperature 8.1 K, fields the order 3 T. Modulation amplitude achieved acting on side gates lithographed close to two-dimensional electron gas. Low-temperature measurements reveal also well-developed quantum Hall plateaus, showing clean quantization conductance. used manipulate channel width carrier density in device. These findings potential these hybrid investigate coexistence superconductivity Quantum effect first step development new device architectures hosting states matter.