Thermal Bias on the Pumped Spin-Current in a Two-Level Quantum Dot

Wang, Song; Cheng, Jie; Zhou, Yun; Liu, Jia

doi:10.1007/s10773-015-2908-4

Cited by 1 publication

(1 citation statement)

References 37 publications

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“…The pure spin current has been implemented successfully through the spin Hall effect, [22][23][24][25] nonlocal spin valves, 10,19,26 spin pumping, [27][28][29][30] magnetization dynamics, 31 the longitudinal spin Seebeck effect, [32][33][34][35] and nonlocal spin injection. 18,36,37 Various new mechanisms are also developed to generate the pure spin current, for example, the adiabatic twisting of a magnetic molecule in graphene, 38 Auger recombination in Rashba quantum wells 39 with Rashba SOC, and the separation of the chiral states with perfect spin polarization in two-dimensional honeycomb lattices.…”

Section: Introductionmentioning

confidence: 99%

Magnetic field manipulation of spin current in a single-molecule magnet tunnel junction with two-electron Coulomb interaction

et al. 2018

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In this work, we study the generation of spin-current in a single-molecule magnet (SMM) tunnel junction with Coulomb interaction of transport electrons and external magnetic field. In the absence of field the spin-up and -down currents are symmetric with respect to the initial polarizations of molecule. The existence of magnetic field breaks the time-reversal symmetry, which leads to unsymmetrical spin currents of parallel and antiparallel polarizations. Both the amplitude and polarization direction of spin current can be controlled by the applied magnetic field. Particularly when the magnetic field increases to a certain value the spin-current with antiparallel polarization is reversed along with the magnetization reversal of the SMM. The two-electron occupation indeed enhances the transport current compared with the single-electron process. However the increase of Coulomb interaction results in the suppression of spin-current amplitude at the electron-hole symmetry point. We propose a scheme to compensate the suppression with the magnetic field.

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