A novel superconducting-velocity--tunable quasiparticle state and spin relaxation in GaAs (100) quantum wells in proximity to $s$-wave superconductor

Abstract

We present a novel quasiparticle state driven by a supercurrent in GaAs (100) quantum wells in proximity to an $s$-wave superconductor, which can be tuned by the superconducting velocity. Rich features such as the suppressed Cooper pairings, large quasiparticle density and non-monotonically tunable momentum current can be realized by varying the superconducting velocity. In the degenerate regime, the quasiparticle Fermi surface is composed by two arcs, referred to as Fermi arcs, which are contributed by the electron- and hole-like branches. The D'yakonov-Perel' spin relaxation is explored, and intriguing physics is revealed when the Fermi arc emerges. Specifically, when the order parameter tends to zero, it is found that the branch-mixing scattering is forbidden in the quasi-electron band. When the condensation process associated with the annihilation of the quasi-electron and quasi-hole is {\em slow}, this indicates that the electron- and hole-like Fermi arcs in the quasi-electron band are independent. The open structure of the Fermi arc leads to the nonzero angular-average of the effective magnetic field due to the spin-orbit coupling, which acts as an effective Zeeman field. This Zeeman field leads to the spin oscillations even in the strong scattering regime. Moreover, in the strong scattering regime, we show that the open structure of the Fermi arc also leads to the insensitiveness of the spin relaxation to the momentum scattering, in contrast to the conventional motional narrowing situation. Nevertheless, with a {\em finite} order parameter, the branch-mixing scattering can be triggered, opening the inter-branch spin relaxation channel, which is dominant in the strong scattering regime. In contrast to the situation with an extremely small order parameter,....(omitted due to the limit of space)

arXiv comment18 pages, 9 figures

References in corpus (43)

• Spintronics: Fundamentals and applications
• Proximity effects in superconductor-ferromagnet heterostructures
• A generic new platform for topological quantum computation using semiconductor heterostructures
• Odd Triplet Superconductivity and Related Phenomena in Superconductor-Ferromagnet Structures
• Superconducting Spintronics
• Superconducting 2D system with lifted spin degeneracy: Mixed singlet-triplet state
• Spin-polarized supercurrents for spintronics: a review of current progress
• Spin dynamics in semiconductors
• Majorana Fermions in Semiconductor Nanowires
• Spin-orbit coupling as a source of long-range triplet proximity effect in superconductor-ferromagnet hybrid structures
• Theoretical aspects of Andreev spectroscopy and tunneling spectroscopy in non-centrosymmetric superconductors: a topical review
• Spin-Imbalance and Magnetoresistance in Ferromagnet/Superconductor/Ferromagnet Double Tunnel Junctions
• Singlet-triplet conversion and the long-range proximity effect in superconductor-ferromagnet structures with generic spin dependent fields
• Induced superconductivity in high mobility two dimensional electron gas in GaAs heterostructures
• Spin Imbalance and Spin-Charge Separation in a Mesoscopic Superconductor
• Extremely long quasiparticle spin lifetimes in superconducting aluminium using MgO tunnel spin injectors
• Long-range spin-polarized quasiparticle transport in mesoscopic Al superconductors with a Zeeman splitting
• Majorana fermions in ferromagnetic chains on the surface of bulk spin-orbit coupled $s$-wave superconductors
• Spin injection and relaxation in a mesoscopic superconductor
• Electron spin relaxation due to D'yakonov-Perel' and Elliot-Yafet mechanisms in monolayer MoS${}_2$: Role of intravalley and intervalley processes
• Spin Supercurrent, Magnetization Dynamics, and Phi-State in Spin-Textured Josephson Junctions
• Spin transport and relaxation in superconductors
• Supercurrent-Induced Magnetization Dynamics
• Novel valley depolarization dynamics and valley Hall effect of exciton in mono- and bilayer MoS${}_2$
• Doppler Shift in Andreev Reflection from a Moving Superconducting Condensate in Nb/InAs Josephson Junctions
• Spin transport and magnetoresistance in F/S/F spin valves
• Electron spin diffusion and transport in graphene
• Transport equations for superconductors in the presence of spin interaction
• Intrinsic electron spin relaxation due to the D'yakonov-Perel' mechanism in monolayer MoS${}_2$
• General conditions for proximity-induced odd-frequency superconductivity in two-dimensional electronic systems
• Magnetic field influence on the proximity effect in semiconductor - superconductor hybrid structures and their thermal conductance
• Supercurrent in Nodal Superconductors
• Anomalous Transport Phenomena in $p_x+i{p}_y$ Superconductors
• Intrinsic Spin Hall Effect in s-wave Superconducting State: Analysis of Rashba Model
• Interaction effects on proximity-induced superconductivity in semiconducting nanowires
• Gapped triplet $p$-wave superconductivity in strong spin-orbit-coupled semiconductor quantum wells in proximity to $s$-wave superconductor
• Nonmetallic thermal transport in low-dimensional proximity structures with partially preserved time-reversal symmetry in a magnetic field
• Electron spin relaxation in bilayer graphene
• Electron spin relaxation in rippled graphene with low mobilities
• Boltzmann Equations for Spin and Charge Relaxations in Superconductors
• Critical Current of the Spin-Triplet Superconducting Phase in Sr${}_2$RuO${}_4$
• Anomalous D'yakonov-Perel' spin relaxation in InAs (110) quantum wells under strong magnetic field: role of Hartree-Fock self-energy
• Response, relaxation and transport in unconventional superconductors

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