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Fletta eftir efnisorði "Þéttefnisfræði"

Fletta eftir efnisorði "Þéttefnisfræði"

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    Sequential magnetic switching in Fe/MgO(001) superlattices 
    Magnus, Fridrik; Warnatz, T.; Palsson, G. K.; Devishvili, A.; Ukleev, V.; Palisaitis, J.; Persson, P. O. Å.; Hjörvarsson, Björgvin (American Physical Society (APS), 2018-05-24)
    Polarized neutron reflectometry is used to determine the sequence of magnetic switching in interlayer exchange coupled Fe/MgO(001) superlattices in an applied magnetic field. For 19.6 Å thick MgO layers we obtain a 90 ∘ periodic magnetic alignment ...
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    Stability and lifetime of antiferromagnetic skyrmions 
    Bessarab, Pavel; Yudin, D.; Gulevich, D. R.; Wadley, P.; Titov, M.; Tretiakov, Oleg A. (American Physical Society (APS), 2019-04-26)
    The two-dimensional Heisenberg exchange model with out-of-plane anisotropy and a Dzyaloshinskii-Moriya interaction is employed to investigate the lifetime and stability of antiferromagnetic (AFM) skyrmion as a function of temperature and external ...
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    Time evolution of entanglement for holographic steady state formation 
    Erdmenger, Johanna; Fernández, Daniel; Flory, Mario; Megías, Eugenio; Straub, Ann-Kathrin; Witkowski, Piotr (Springer Nature, 2017-10)
    Within gauge/gravity duality, we consider the local quench-like time evolution obtained by joining two 1+1-dimensional heat baths at different temperatures at time t = 0. A steady state forms and expands in space. For the 2+1-dimensional gravity dual, ...
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    Topological metamaterials based on polariton rings 
    Kozin, Valerii; Shelykh, Ivan; Nalitov, Anton; Iorsh, Ivan (American Physical Society (APS), 2018-09-10)
    The Chern insulator phase is shown to emerge in two-dimensional arrays of polariton rings where time-reversal symmetry is broken due to the application of an out-of-plane magnetic field. The interplay of Zeeman splitting with the photonic analog of ...
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    Transition from Propagating Polariton Solitons to a Standing Wave Condensate Induced by Interactions 
    Sich, M.; Chana, J. K.; Egorov, O. A.; Sigurdsson, Helgi; Shelykh, Ivan; Skryabin, D. V.; Walker, P. M.; Clarke, E.; Royall, B.; Skolnick, M. S.; Krizhanovskii, D. N. (American Physical Society (APS), 2018-04-19)
    We explore phase transitions of polariton wave packets, first, to a soliton and then to a standing wave polariton condensate in a multimode microwire system, mediated by nonlinear polariton interactions. At low excitation density, we observe ballistic ...