Zobrazeno 1 - 10
of 124
pro vyhledávání: '"Vedmedenko, E. Y."'
Autor:
Kopte, M., Rößler, U. K., Schäfer, R., Kosub, T., Kákay, A., Volkov, O., Fuchs, H., Vedmedenko, E. Y., Radu, F., Schmidt, O. G., Lindner, J., Faßbender, J., Makarov, D.
The magnetic properties of ferromagnetic thin films down to the nanoscale are ruled by the exchange stiffness, anisotropies and the effects of magnetic fields. As surfaces break inversion symmetry, an additional effective chiral exchange is omniprese
Externí odkaz:
http://arxiv.org/abs/1706.09322
Autor:
Hagemeister, J., Iaia, D., Vedmedenko, E. Y., von Bergmann, K., Kubetzka, A., Wiesendanger, R.
Publikováno v:
Phys. Rev. Lett. 117, 207202 (2016)
We have employed spin-polarized scanning tunneling microscopy and Monte-Carlo simulations to investigate the effect of lateral confinement onto the nanoskyrmion lattice in Fe/Ir(111). We find a strong coupling of one diagonal of the square magnetic u
Externí odkaz:
http://arxiv.org/abs/1606.08163
In a broad range of applied magnetic fields and material parameters isolated magnetic skyrmions condense into skyrmion lattices. While the geometry of isolated skyrmions and their lattice counterparts strongly depend on field and Dzyaloshinski-Moriya
Externí odkaz:
http://arxiv.org/abs/1601.04898
Quantum mechanical objects or nanoobjects have been proposed as bits for information storage. While time-averaged properties of magnetic, quantum-mechanical particles have been extensively studied experimentally and theoretically, experimental invest
Externí odkaz:
http://arxiv.org/abs/1601.00803
Publikováno v:
New Journ. Phys. 15 013009 (2013)
We calculate the real time non-equilibrium dynamics of quantum spin systems at finite temperatures. The mathematical framework originates from the $C^*$-approach to quantum statistical mechanics and is applied to samples investigated by means of spin
Externí odkaz:
http://arxiv.org/abs/1308.2875
Autor:
Vedmedenko, E. Y., Mikuszeit, N., Stapelfeldt, T., Wieser, R., Potthoff, M., Lichtenstein, A., Wiesendanger, R.
Publikováno v:
Eur. Phys. J. B 80, 331 (2011)
Using exact diagonalization, Monte-Carlo, and mean-field techniques, characteristic temperature scales for ferromagnetic order are discussed for the Ising and the classical anisotropic Heisenberg model on finite lattices in one and two dimensions. Th
Externí odkaz:
http://arxiv.org/abs/1102.3062
Akademický článek
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Publikováno v:
Phys. Rev. B 77, 184425 (2008)
In using the fully relativistic versions of the Embedded Cluster and Screened Korringa-Kohn-Rostoker methods for semi-infinite systems the magnetic properties of single adatoms of Fe and Co on Ir(111) and Pt(111) are studied. It is found that for Pt(
Externí odkaz:
http://arxiv.org/abs/0805.3610
Publikováno v:
Phil. Mag. 88 (2008) 2197-2207.
Based on Monte Carlo calculations, multipolar ordering on the Penrose tiling, relevant for two-dimensional molecular adsorbates on quasicrystalline surfaces and for nanomagnetic arrays, has been analyzed. These initial investigations are restricted t
Externí odkaz:
http://arxiv.org/abs/0805.1216
Publikováno v:
Philosophical Magazine 86 (2006) 733-739
The stable magnetisation configurations of antiferromagnets on quasiperiodic tilings are investigated theoretically. The exchange coupling is assumed to decrease exponentially with the distance between magnetic moments. It is demonstrated that the co
Externí odkaz:
http://arxiv.org/abs/cond-mat/0509461