Bending-strain effects in conventional superconductors and superconducting junctions
arXiv:2412.07529 · doi:10.1038/s44306-025-00084-1
Abstract
We consider the effect of bending-strain in thin films of clean, conventional superconductors (S), and the proximity-induced effect of this strain in SN bilayers with a normal metal (N), and SNS junctions with equal curvatures in each superconductor. We find that the effective spin-orbit coupling due to strain in the superconductor induces both spin-polarized and unequal-spin even-frequency p-wave triplet pairings throughout the superconductor. When interfaced with a normal metal, additional odd-frequency pairings are induced, and their magnitudes can be tuned with the strain. In SNS junctions, the strain alone can induce a superconducting spin current in the junction. The spin-polarized current can undergo a -transition, resulting in an in-plane, strain-induced magnetization that switches sign as a function of the strain. We discuss the underlying physics and its implications for superconducting spintronics.
13 pages, 8 figures
References in corpus (37)
- New Perspectives for Rashba Spin-Orbit Coupling
- Coupling of two superconductors through a ferromagnet : evidence for a pi-junction
- Superconducting Spintronics
- Spin-polarized supercurrents for spintronics: a review of current progress
- Observation of spin-triplet superconductivity in Co-based Josephson Junctions
- Geometry-dependent critical currents in superconducting nanocircuits
- Odd-frequency superconductivity
- Spin-orbit coupling as a source of long-range triplet proximity effect in superconductor-ferromagnet hybrid structures
- Odd-frequency pairing in normal metal/superconductor junctions
- Properties of Odd Gap Superconductors
- Singlet-triplet conversion and the long-range proximity effect in superconductor-ferromagnet structures with generic spin dependent fields
- Photostrictive materials
- Quantum mechanics of a spin-orbit coupled electron constrained to a space curve
- Electronic materials with nanoscale curved geometries
- Geometry controlled superconducting diode and anomalous Josephson effect triggered by the topological phase transition in curved proximitized nanowires
- Edge states and topological insulating phases generated by curving a nanowire with Rashba spin-orbit coupling
- Absence of anomalous interactions in the quantum theory of constrained charged particles in presence of electrical currents
- Curvature-induced geometric potential in strain-driven nanostructures
- Odd-frequency superconducting pairing in junctions with Rashba spin-orbit coupling
- Designing Electron Spin Textures and Spin Interferometers by Shape Deformations
- Ferromagnetic Materials for Josephson π Junctions
- Tuning Pairing Amplitude and Spin-Triplet Texture by Curving Superconducting Nanostructures
- Universal spin superconducting diode effect from spin-orbit coupling
- Curvature control of the superconducting proximity effect in diffusive ferromagnetic nanowires
- Superconductivity assisted change of the perpendicular magnetic anisotropy in V/MgO/Fe junctions
- Independent geometrical control of spin and charge resistances in curved spintronics
- Curvature-induced long ranged supercurrents in diffusive SFS Josephson Junctions, with dynamic transition
- Geometry -- dependent effects in Majorana nanowires
- High magnetic field superconductivity in a two-band superconductor
- Geometry-induced topological superconductivity
- Topological superconducting phases and Josephson effect in curved time-reversal-invariant superconductors
- Spin phase regulated spin Josephson supercurrent in topological superconductor
- Can the noble metals (Au, Ag and Cu) be superconductors?
- Direct and inverse superspin Hall effect in two-dimensional systems: Electrical detection of spin supercurrents
- Interface probe for antiferromagnets using geometric curvature
- A generic model with unconventional Rashba bands and giant spin galvanic effect
- Electrical control of superconducting spin valves using ferromagnetic helices