Journal
PHYSICAL REVIEW B
Volume 106, Issue 5, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevB.106.054207
Keywords
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Funding
- Center for Emergent Materials, an NSF MRSEC [DMR-1420451]
- Center for Emergent Materials, an NSF MRSEC [DMR-1420451]
- National Science Foundation [DMR-1420451, DMR- 2014786]
- [DMR-2152540]
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A pure spin current can be controlled by an external magnetic field and a linearly inhomogeneous spin-only field under specific conditions. This phenomenon can be validated through classical models and optical experiments.
A pure spin current is predicted to occur when an external magnetic field and a linearly inhomogeneous spinonly field are appropriately aligned. Under these conditions (such as originate from nuclear contact hyperfine fields that do not affect orbital motion) a linear, spin-dependent dispersion for free electrons emerges from the Landau Hamiltonian. The result is that spins of opposite orientation flow in opposite directions giving rise to a pure spin current. A classical model of the spin and charge dynamics reveals intuitive aspects of the full quantum mechanical solution. We propose optical orientation or electrical polarization experiments to demonstrate this outcome.
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