A cryogenic memory element based on an anomalous Josephson junction

Abstract

We propose a non-volatile memory element based on a lateral ferromagnetic Josephson junction with spin-orbit coupling and out-of-plane magnetization. The interplay between the latter and the intrinsic exchange field of the ferromagnet leads to a magnetoelectric effect that couples the charge current through the junction and its magnetization, such that by applying a current pulse the direction of the magnetic moment in F can be switched. The two memory states are encoded in the direction of the out-of-plane magnetization. With the aim to determine the optimal working temperature for the memory element, we explore the noise-induced effects on the averaged stationary magnetization by taking into account thermal fluctuations affecting both the Josephson phase and the magnetic moment dynamics. We investigate the switching process as a function of intrinsic parameters of the ferromagnet, such as the Gilbert damping and strength of the spin-orbit coupling, and proposed a non-destructive readout scheme based on a dc-SQUID. Additionally, we analyze a way to protect the memory state from external perturbations by voltage gating in systems with a both linear-in-momentum Rashba and Dresselhaus spin-orbit coupling.

11 pages, 10 figures

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Cited by in corpus (29)

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• Josephson junction-based axion detection through resonant activation
• Magnetization reversal in S/F/S Josephson junctions on a 3D topological insulator
• rf-SQUID measurements of anomalous Josephson effect
• Anomalous Gilbert Damping and Duffing Features of the SFS {\boldmath ${\phi }_0$} Josephson Junction
• Locking of magnetization and Josephson oscillations at ferromagnetic resonance in ${\phi }_0$ junction under external radiation
• Switching current distributions in ferromagnetic anomalous Josephson junctions
• Long-range interaction of magnetic moments in a coupled system of S/F/S Josephson junctions with anomalous ground-state phase shift
• Anomalous Josephson Effect in Topological Insulator-Based Josephson Trijunction
• Hysteresis and chaos in anomalous Josephson junctions without capacitance
• Reconstruction-Induced ${\phi }_0$ Josephson Effect in Quantum Spin Hall Constrictions
• Controllable magnetic states in chains of coupled phi-0 Josephson junctions with ferromagnetic weak links
• Non-Hermitian superconducting diode effect
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• Nonlinear Behavior of Josephson Traveling Wave Parametric Amplifiers
• Magnetic eigenmodes in chains of coupled phi0-Josephson junctions with ferromagnetic weak links
• Buzdin, Shapiro and Chimera Steps in ${\phi }_0$ Josephson Junctions
• Experimental demonstrations of Josephson threshold detectors for broadband microwave photons detection
• Buzdin, Shapiro and Chimera Steps in ${\phi }_0$ Josephson Junctions. II. Bifurcation, Switching, and Hysteresis
• Voltage-driven dynamics of ${\phi }_0$-S/F/S Josephson junctions chains
• Superluminal Propagation of Composite Collective Modes in Superconductor-Ferromagnet Heterostructures
• Hybrid collective excitations in topological superconductor/ferromagnetic insulator heterostructures
• Originality of resonance and locking phenomena in SFS ${\phi }_0$ Josephson junction
• Anomalous phase shift and superconducting diode effect in Josephson junctions via thin films of rare-earth intermetallic magnets
• Intrinsic space-time crystalline order in a hybrid Josephson junction