Josephson Junction Dynamics with Rashba and Dresselhaus Spin-Orbit Coupling
ORAL
Abstract
Planar Josephson junctions (JJs) provide a suitable platform to realize topological superconductivity.
This is demonstrated from the observation of the closing and reopening of the anisotropic superconducting gap with the increased in-plane magnetic field and the direct measurement of the approximately pi-phase jump in Al/InAs-based JJs [1]. While such studies typically focus on the assumption of the time-independent Rashba-dominated spin-orbit coupling (SOC) [2], gate-controlled JJs offer much richer opportunities [3]. The presence of Dresselhaus SOC can strongly modify the Josephson energy and the current-phase relations, as can be already seen for the steady-state studies of JJs [4]. By considering instead the time-dependent SOC, we examine several trends associated with the simultaneous presence Rashba and Dresselhaus SOC and explore the feasibility of their experimental demonstration.
This is demonstrated from the observation of the closing and reopening of the anisotropic superconducting gap with the increased in-plane magnetic field and the direct measurement of the approximately pi-phase jump in Al/InAs-based JJs [1]. While such studies typically focus on the assumption of the time-independent Rashba-dominated spin-orbit coupling (SOC) [2], gate-controlled JJs offer much richer opportunities [3]. The presence of Dresselhaus SOC can strongly modify the Josephson energy and the current-phase relations, as can be already seen for the steady-state studies of JJs [4]. By considering instead the time-dependent SOC, we examine several trends associated with the simultaneous presence Rashba and Dresselhaus SOC and explore the feasibility of their experimental demonstration.
*National Science Foundation (NSF) Electrical, Communications and Cyber Systems (ECCS) Grant No. 2130845, the U.S. Office of Naval Research (ONR) through Grants No. N000141712793 and MURI No. N000142212764 (D. T., A. Q., D. M. and I. Ž.), and the University at Buffalo Center for Computational Research.
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Publication: [1] M. C. Dartiailh et al., Phys. Rev. Lett. 126, 036802 (2021).
[2] M. Amudsen et al., arXiv:2210.03549.
[3] D. Monroe, M. Alidoust, I. Žutic, Phys Rev. App. 18, L031001 (2022)
[4] M. Alidoust, Phys. Rev. B 101, 155123 (2020)
Presenters
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Dario Tringali
- State Univ of NY - Buffalo