Thermomagnetic Anomalies by Magnonic Criticality in Ultracold Atomic Transport
arXiv:2312.04280 · doi:10.1103/PhysRevLett.133.163402
Abstract
We investigate thermomagnetic transport in an ultracold atomic system with two ferromagnets linked via a magnetic quantum point contact. Using nonequilibrium Green's function approach, we show a divergence in spin conductance and a slowing down of spin relaxation that manifest in the weak effective-Zeeman-field limit. These anomalous spin dynamics result from the magnonic critical point at which magnons become gapless due to spontaneous magnetization. Our findings unveil untapped dynamics in ultracold atomic systems, opening new avenues in thermomagnetism.
arXiv comment16 pages, 6 figures
References in corpus (38)
- Spin Caloritronics
- Spin Seebeck insulator
- Controlling Spin Exchange Interactions of Ultracold Atoms in Optical Lattices
- Observation of the Spin-Seebeck Effect in a Ferromagnetic Semiconductor
- Theory of magnon-driven spin Seebeck effect
- Theory of the Spin Seebeck Effect
- Quantum dynamics of a single, mobile spin impurity
- Counterflow Superfluidity of Two-Species Ultracold Atoms in a Commensurate Optical Lattice
- Microscopic observation of magnon bound states and their dynamics
- Phase diagram of two-component bosons on an optical lattice
- A thermoelectric heat engine with ultracold atoms
- Universal Spin Transport in a Strongly Interacting Fermi Gas
- Spin transport in a tunable Heisenberg model realized with ultracold atoms
- Linear-response theory of spin Seebeck effect in ferromagnetic insulators
- Unified Description of Nambu-Goldstone Bosons without Lorentz Invariance
- Quantum gas microscopy of Kardar-Parisi-Zhang superdiffusion
- Far-from-equilibrium spin transport in Heisenberg quantum magnets
- String patterns in the doped Hubbard model
- Counting rule for Nambu-Goldstone modes in nonrelativistic systems
- Subdiffusion and heat transport in a tilted 2D Fermi-Hubbard system
- Spin Transport in a Mott Insulator of Ultracold Fermions
- Two-terminal transport measurements with cold atoms
- Observation of first and second sound in a BKT superfluid
- Spin dynamics for bosons in an optical lattice
- Catching Bethe phantoms and quantum many-body scars: Long-lived spin-helix states in Heisenberg magnets
- Transverse spin dynamics in the anisotropic Heisenberg model realized with ultracold atoms
- Spin current noise of the spin Seebeck effect and spin pumping
- Mapping out spin and particle conductances in a quantum point contact
- Microscopic theory of spin transport at the interface between the superconductor and a ferromagnetic insulator
- Theory of spin Peltier effect
- Spin Transport in Polaronic and Superfluid Fermi Gases
- Breakdown of the Wiedemann-Franz law in a unitary Fermi gas
- Wiedemann-Franz Law for Magnon Transport
- Thermography of the superfluid transition in a strongly interacting Fermi gas
- Universal Spin Transport and Quantum Bounds for Unitary Fermions
- Preparation of the spin-Mott state: a spinful Mott insulator of repulsively bound pairs
- Quantized conductance through the quantum evaporation of bosonic atoms
- Magnonic Noise and Wiedemann-Franz Law