Magnonic spin current shot noise in an itinerant Fermi gas
arXiv:2311.12383 · doi:10.1103/PhysRevApplied.21.L031001
Abstract
Spin transport phenomena at strongly-correlated interfaces play central roles in fundamental physics as well as spintronic applications. To anatomize spin-transport carriers, we propose the detection of the spin current noise in interacting itinerant fermions. The Fano factor given by the ratio between the spin current and its noise reflects elementary carriers of spin transport at the interface of spin-polarized Fermi gases realized in ultracold atoms. The change of the Fano factor microscopically evinces a crossover from the quasiparticle transport to magnon transport in itinerant fermionic systems.
6 pages, 4 figures
References in corpus (15)
- Spin Seebeck insulator
- Crossover from a molecular Bose-Einstein condensate to a degenerate Fermi gas
- Theory of magnon-driven spin Seebeck effect
- Two-terminal transport measurements with cold atoms
- Enhanced DC Spin Pumping into a Fluctuating Ferromagnet near Tc
- Spin current noise of the spin Seebeck effect and spin pumping
- Microscopic theory of spin transport at the interface between the superconductor and a ferromagnetic insulator
- Theory of spin Peltier effect
- Spin diffusion in Fermi gases
- On the Stability of the Repulsive Fermi Gas with Contact Interactions
- Multi-Particle Tunneling Transport at Strongly-Correlated Interfaces
- Nonequilibrium noise as a probe of pair-tunneling transport in the BCS--BEC Crossover
- Negative correlation between the linear and the nonlinear conductance in magnetic tunnel junctions
- Spin transport between polarized Fermi gases near the ferromagnetic phase transition
- Electrical detectability of magnon-mediated spin current shot noise