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Dynamical spin accumulation in large-spin magnetic molecules

Anna Plominska ; Ireneusz Weymann ; Maciej Misiorny (Institutionen för mikroteknologi och nanovetenskap, Tillämpad kvantfysik)
Physical Review B. Condensed Matter and Materials Physics (1098-0121). Vol. 97 (2018), 3, p. 035415.
[Artikel, refereegranskad vetenskaplig]

The frequency-dependent transport through a nanodevice containing a large-spin magnetic molecule is studied theoretically in the Kondo regime. Specifically, the effect of magnetic anisotropy on dynamical spin accumulation is of primary interest. Such accumulation arises due to finite components of frequency-dependent conductance that are off diagonal in spin. Here, employing the Kubo formalism and the numerical renormalization group method, we demonstrate that the dynamical transport properties strongly depend on the relative orientation of spin moments in electrodes of the device, as well as on intrinsic parameters of the molecule. In particular, the effect of dynamical spin accumulation is found to be greatly affected by the type of magnetic anisotropy exhibited by the molecule, and it develops for frequencies corresponding to the Kondo temperature. For the parallel magnetic configuration of the device, the presence of dynamical spin accumulation is conditioned by the interplay of ferromagnetic-lead-induced exchange field and the Kondo correlations.

Nyckelord: Kondo effect, magnetic anisotropy, quantum transport, dynamical spin accumulation

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Denna post skapades 2018-01-11. Senast ändrad 2018-01-11.
CPL Pubid: 254431


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