Switching properties of a tunneling junction connected to a spin valve

Weinberger, P.

doi:10.1103/physrevb.83.134413

Cited by 2 publications

(1 citation statement)

References 26 publications

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“…[22] Even attempts were made to determine switching times and critical currents by means of multi-scale approaches using the LLG equation and other 'classical' relations with ab initio parameters. The obtained results agreed reasonably well [23] with the corresponding experimental data and suggested that in dealing theoretically with time-dependent properties this leads to completely new insights of switching processes [24]. However, in all these multi-scale schemes, a correct description of time dependence was only circumvented.…”

Section: Resultssupporting

confidence: 81%

Spin polarization effects and their time evolutions

Vernes

Weinberger²

2015

Philosophical Magazine

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The time evolution of the density corresponding to the polarization operator, originally constructed to commute with the Dirac Hamiltonian in the absence of an external electromagnetic field, is investigated in terms of the time-dependent Dirac equation taking the presence of an external electromagnetic field into account. It is found that this time evolution leads to 'tensorial' and 'vectorial' particle current densities and to the interaction of the spin density with the external electromagnetic field. As the time evolution of the spin density does not refer to a constant of motion (continuity condition) it only serves as auxiliary density. By taking the non-relativistic limit, it is shown that the polarization, spin and magnetization densities are independent of electric field effects and, in addition, no preferred directions can be defined.

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Section: Resultssupporting

confidence: 81%