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Fletta eftir efnisorði "Eðlisfræði"

Fletta eftir efnisorði "Eðlisfræði"

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  • Mantovan, R.; Fallica, R.; Mokhles Gerami, A.; Mølholt, T. E.; Wiemer, C.; Longo, M.; Gunnlaugsson, Haraldur; Johnston, K.; Masenda, H.; Naidoo, D.; Ncube, M.; Bharuth-Ram, K.; Fanciulli, M.; Gíslason, Hafliði Pétur; Langouche, G.; Olafsson, Sveinn; Weyer, G. (Springer Nature, 2017-08-15)
    The underlying mechanism driving the structural amorphous-to-crystalline transition in Group VI chalcogenides is still a matter of debate even in the simplest GeTe system. We exploit the extreme sensitivity of 57Fe emission Mössbauer spectroscopy, ...
  • Marteinsdóttir, María (University of Iceland, School of Engineering and Natural Sciences, Faculty of Physical Sciences, 2021-04)
    Application of external beam radiation therapy (EBRT) to localized cancer has long been regarded as a standard treatment option with its purpose being to deliver a ho- mogeneous high-dose distribution within the tumor volume while protecting organs at ...
  • Shahnazaryan, Vanik (University of Iceland, School of Engineering and Natural Sciences, Faculty of Physical Sciences, 2017-10)
    The physics of light-matter interactions is a rapidly developing interdisciplinary research area, combining methods and phenomena both from condensed matter physics and quantum optics. One of the most common realizations of strong coupling regime implies ...
  • Erdmenger, Johanna; Fernández, Daniel; Goulart, Prieslei; Witkowski, Piotr (Springer Nature, 2017-03)
    In the context of applications of the AdS/CFT correspondence to condensed matter physics, we compute conductivities for field theory duals of dyonic planar black holes in 3+1-dimensional Einstein-Maxwell-dilaton theories at zero temperature. We ...
  • Kozin, Valerii (Springer Science and Business Media LLC, 2019-09-01)
    The BCFW recursion relation in N = 4 super-Yang-Mills theory is solved using Yang-Baxter R-operators in the NMHV sector. Explicit expressions for R-invariants are obtained in terms of the chains of R-operators acting on an appropriate basic state.
  • Bohr, Sebastian (University of Iceland, School of Engineering and Natural Sciences, Faculty of Physical Sciences, 2021-07)
    The nature of dark matter (DM) as a particle is still an unresolved mystery in Physics. Therefore, a vast amount of competing particle models have been proposed. A promising category among these models are those that include relevant collisional damping ...
  • Hassanian, Reza; Helgadóttir, Ásdís; Riedel, Morris (MDPI AG, 2022-11-03)
    The subject of this study presents an employed method in deep learning to create a model and predict the following period of turbulent flow velocity. The applied data in this study are extracted datasets from simulated turbulent flow in the laboratory ...
  • Viðarsson, Arnar (University of Iceland, School of Engineering and Natural Sciences, Faculty of Physical Sciences, 2023)
    The semiconductor silicon carbide (SiC) might be the key to next-generation of power electronic devices. Its favourable material properties can outperform existing silicon (Si) devices enabling better energy efficiency in power electronics. However, ...
  • Kateb, Movaffaq; Gudmundsson, Jon Tomas; Ingvarsson, Snorri (AIP Publishing, 2019-03-08)
    We investigate the effect of atomic ordering on the magnetic anisotropy of Ni80Fe20 at.% (Py). To this end, Py films were grown epitaxially on MgO(001) using dc magnetron sputtering (dcMS) and high power impulse magnetron sputtering (HiPIMS). Aside ...
  • Liashko, Sergei Y; Jónsson, Hannes; Uzdin, Valery M (IOP Publishing, 2017-11-07)
    Transitions between magnetic states of one and two ring kagome spin ice elements consisting of 6 and 11 prolate magnetic islands are calculated and the lifetime of the ground states evaluated using harmonic transition state theory and the stationary ...
  • Schrautzer, Hendrik; von Malottki, Stephan; Heinze, Stefan; Bessarab, Pavel (American Physical Society (APS), 2022-01-11)
    Theoretical calculations of thermally activated decay of skyrmions in systems comprising several magnetic monolayers are presented, with a special focus on bilayer systems. Mechanisms of skyrmion collapse are identified and corresponding energy barriers ...
  • Khosa, Rabia Yasmin; Þorsteinsson, Einar Baldur; Winters, M.; Rorsman, N.; Karhu, R.; Hassan, J.; Sveinbjörnsson, Einar (AIP Publishing, 2018-02)
    We report on the electrical properties of Al2O3 films grown on 4H-SiC by successive thermal oxidation of thin Al layers at low temperatures (200°C - 300°C). MOS capacitors made using these films contain lower density of interface traps, are more immune ...
  • Khosa, Rabia Yasmin (2017)
    Silicon is a semiconductor material used in most power devices and the Si metal-oxide-semiconductor field effect transistor (MOSFET) is the key switching device for high power applications. Recently silicon carbide (SiC) MOSFETs have emerged on the ...
  • Gudmundsson, Vidar; Abdullah, Nzar; Sitek, Anna; Goan, Hsi-Sheng; Tang, Chi-Shung; Manolescu, Andrei (Wiley-Blackwell, 2017-12-07)
    We show that a Rabi-splitting of the states of strongly interacting electrons in parallel quantum dots embedded in a short quantum wire placed in a photon cavity can be produced by either the para- or the dia-magnetic electron-photon interactions ...
  • Andrea, Proto (University of Iceland, School of Engineering and Natural Sciences, Faculty of Physical Sciences, 2021)
    The aim of this work is to explore the role of electronegativity and the electron power absorption mechanism in electronegative capacitively coupled oxygen and chlorine discharges. The fundamental mechanisms underlying the electron heating and the ...
  • von Malottki, S.; Dupé, B.; Bessarab, Pavel; Delin, A.; Heinze, S. (Springer Nature, 2017-09-26)
    Skyrmions are localized, topologically non-trivial spin structures which have raised high hopes for future spintronic applications. A key issue is skyrmion stability with respect to annihilation into the ferromagnetic state. Energy barriers for this ...
  • Angel Ramelli, Juan Fernando; Giangreco Puletti, Valentina; Thorlacius, Larus (Springer Science and Business Media LLC, 2019-08-01)
    We compute universal finite corrections to entanglement entropy for generalised quantum Lifshitz models in arbitrary odd spacetime dimensions. These are generalised free field theories with Lifshitz scaling symmetry, where the dynamical critical exponent ...
  • Mökkönen, Harri (Aalto University, Helsinki;University of Iceland, Reykjavik, 2016)
    A polymer escaping from a confining external potential represents a generic description of long macromolecules crossing an energy barrier. This type of barrier crossing problems are typical in nano- and microscale polymeric systems, where the polymers ...
  • Whittaker, C. E.; Cancellieri, E.; Walker, P. M.; Gulevich, D. R.; Schomerus, H.; Vaitiekus, D.; Royall, B.; Whittaker, D. M.; Clarke, E.; Iorsh, Ivan; Shelykh, Ivan; Skolnick, M. S.; Krizhanovskii, D. N. (American Physical Society (APS), 2018-03-02)
    We study exciton polaritons in a two-dimensional Lieb lattice of micropillars. The energy spectrum of the system features two flat bands formed from S and P x , y photonic orbitals, into which we trigger bosonic condensation under high power ...
  • Sitek, Anna; Urbaneja Torres, Miguel; Torfason, Kristinn; Gudmundsson, Vidar; Bertoni, Andrea; Manolescu, Andrei (American Chemical Society, 2018-04-21)
    The distinctive prismatic geometry of semiconductor core-shell nanowires leads to complex localization patterns of carriers. Here, we describe the formation of optically active in-gap excitonic states induced by the interplay between localization of ...