InAs/Al epitaxial heterostructures allow for transparent semiconductor/superconductor interfaces to study superconducting proximity effect, particularly in Josephson junctions. A superconducting quantum interference device (SQUID) constructed from such junctions opens the possibility of studying current-phase relations in these materials systems. One distinct property of this system is the gate-tunability where each junction can be depleted, effectively turning off the current in that junction. This allows for detailed analysis of the supercurrent properties not previously possible in a single device. The second important feature of this system is the presence of spin-orbit coupling in InAs, whose strength is gate-tunable. We study the SQUID signal as we tune the spin-orbit coupling in each arm using independent gate voltages. The comparison between experimental data and theoretical simulation suggests that spin-orbit coupling can be detected in SQUID signal. This direct probe of spin-orbit coupling in proximitized systems represents an important tool to study systems which potentially host Majorana fermions.
*We acknowledge support from DARPA TEE
–
Presenters
William Andrew Mayer
Department of Physics, New York University
Physics, New York University
Center for Quantum Phenomena, Department of Physics, New York University
Authors
William Andrew Mayer
Department of Physics, New York University
Physics, New York University
Center for Quantum Phenomena, Department of Physics, New York University
SiChao Yu
Department of Physics, New York University
Physics, New York University
Kaushini Wickramasinghe
University of Oklahoma
Department of Physics, New York University
Physics, New York University
Physics, University of Maryland, College Park
Center for Quantum Phenomena, Department of Physics, New York University
University of Maryland, College Park
Joseph Yuan
Department of Physics, New York University
Physics, New York University
Center for Quantum Phenomena, Department of Physics, New York University
Narayan Mohanta
Departiment of Physics and Astronomy, Wayne State University
Wayne State University
Physics, Wayne State University
Alex Matos Abiague
Department of Physics and Astronomy, Wayne State University
Wayne State University Detroit
Departiment of Physics and Astronomy, Wayne State University
Wayne State University
Physics, Wayne State University
Igor Zutic
University at Buffalo, The State University of New York
Department of Physics, State University of New York at Buffalo
Department of Physics, University at Buffalo
Physics, State Univ of NY - Buffalo
Physics, University at Buffalo, The State University of New York
Physics, State University of New York at Buffalo
Javad Shabani
Department of Physics, New York University
Physics, New York University
Center for Quantum Phenomena, Department of Physics, New York University
