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Fletta eftir efnisorði "Rafeindafræði"

Fletta eftir efnisorði "Rafeindafræði"

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    Electrical characterization of high k-dielectrics for 4H-SiC MIS devices 
    Khosa, Rabia Yasmin; Chen, J.T.; Winters, M.; Pálsson, Kjartan; Karhu, R.; Hassan, J.; Rorsman, N.; Sveinbjörnsson, Einar (Elsevier BV, 2019-08-01)
    We report promising results regarding the possible use of AlN or Al 2 O 3 as a gate dielectric in 4H-SiC MISFETs. The crystalline AlN films are grown by hot wall metal organic chemical vapor deposition (MOCVD) at 1100 °C. The amorphous Al 2 O 3 films ...
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    Exciton-exciton interaction in transition-metal dichalcogenide monolayers 
    Shahnazaryan, Vanik; Iorsh, Ivan; Shelykh, Ivan; Kyriienko, O. (American Physical Society (APS), 2017-09-06)
    We study theoretically the Coulomb interaction between excitons in transition metal dichalcogenide (TMD) monolayers. We calculate direct and exchange interaction for both ground and excited states of excitons. The screening of the Coulomb interaction, ...
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    Large uniaxial magnetostriction with sign inversion at the first order phase transition in the nanolaminated Mn2GaC MAX phase 
    Novoselova, Iuliia P.; Petruhins, Andrejs; Wiedwald, Ulf; Ingason, Árni Sigurdur; Hase, Thomas; Magnus, Fridrik; Kapaklis, Vassilios; Palisaitis, Justinas; Spasova, Marina; Farle, Michael; Rosen, Johanna; Salikhov, Ruslan (Springer Nature, 2018-02-08)
    In 2013, a new class of inherently nanolaminated magnetic materials, the so called magnetic MAX phases, was discovered. Following predictive material stability calculations, the hexagonal Mn2GaC compound was synthesized as hetero-epitaxial films ...
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    Modeling electrochemical CO2 and N2 reduction reactions on transition metals and metal oxides 
    Tayyebi, Ebrahim (University of Iceland, School of Engineering and Natural Sciences, Faculty of Industrial Engineering, Mechanical Engineering and Computer Science, 2020-10-22)
    The main target of this thesis is to use density functional theory-based simulations to study electrochemical CO2 and N2 reductions by employing a recent theoretical model of an electrochemical solid-liquid interface. This model is used to investigate ...
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    Optically induced Lifshitz transition in bilayer graphene 
    Iorsh, Ivan; Dini, Kevin Tanguy Elian; Kibis, Oleg; Shelykh, Ivan (American Physical Society (APS), 2017-10-11)
    It is shown theoretically that the renormalization of the electron energy spectrum of bilayer graphene with a strong high-frequency electromagnetic field (dressing field) results in the Lifshitz transition—the abrupt change in the topology of the Fermi ...
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    Topological edge solitons in polaritonic lattice 
    Gulevich, D. R.; Yudin, D.; Skryabin, D. V.; Iorsh, Ivan; Shelykh, Ivan (IEEE, 2017-05)
    We study discrete nonlinear edge excitations of polaritonic kagome lattice. We show that when nontrivial topological phase of polaritons is realized, the kagome lattice permits propagation of bright solitons formed from topological edge states.
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    Why do RuO2 electrodes catalyze electrochemical CO2 reduction to methanol rather than methane or perhaps neither of those? 
    Tayyebi, Ebrahim; Hussain, Javed; Skulason, Egill (Royal Society of Chemistry (RSC), 2020-09-21)
    The electrochemical CO2reduction reaction (CO2RR) on RuO2and RuO2-based electrodes has been shown experimentally to produce high yields of methanol, formic acid and/or hydrogen while methane formation is not detected. This CO2RR selectivity on RuO2is ...