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  • SCL seminar by Dejan Stojkovic
    in some earlier cosmic ray experiments If this alignment is not a fluke then the LHC should be able to see effects associated with the dimensional crossover Further 2 1 dimensional spacetimes have no gravitational degrees of freedom and gravity waves cannot be produced in that epoch in the early universe This places a universal maximum frequency at which primordial gravity waves can propagate which may be accessible to future

    Original URL path: http://www.scl.rs/news/749-scl-seminar-by-dejan-stojkovic (2016-02-10)
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  • SCL seminar by C. A. R. Sa de Melo
    supersolids striped supersolids and collapsed The emergence of a striped supersolid is particularly interesting because the anisotropy of the dipolar interaction can be controlled externally In the case of dipolar bosons in continuum systems we will discuss the finite temperature phase diagram of purely repulsive interactions and show that for large dipolar repulsions a dipolar Wigner crystal appears at low temperatures and melts at intermediate temperatures into a dipolar hexatic

    Original URL path: http://www.scl.rs/news/750-scl-seminar-by-c-a-r-sa-de-melo (2016-02-10)
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  • SCL seminar by Milos Radonjic
    usually dominates the transport in strongly correlated materials It typically leads to pronounced resistivity maxima in the incoherent regime around the coherence temperature T reflecting the tendency of carriers to undergo Mott localization following the demise of the Fermi liquid This behavior is best pronounced in the vicinity of interaction driven Mott like metal insulator transitions where the T decreases while the resistivity maximum ρ max increases Here we show that in this regime the entire family of resistivity curves displays a characteristic scaling behavior ρ T ρ max F T T max while the ρ max and T max T assume a power law dependence on the quasiparticle effective mass m Remarkably precisely such trends are found from an appropriate scaling analysis of experimental data obtained from diluted two dimensional electron gases in zero magnetic fields Our analysis provides strong evidence that inelastic electron electron scattering and not disorder effects dominates finite temperature transport in these systems validating the Wigner Mott picture of the two dimensional metal insulator transition Structural characterization of granular material during the process of compactification News 12 February 2016 SCL Seminar by Jelena Smiljanic 12 January 2016 In memoriam Nikola Buric 28 December 2015 SCL

    Original URL path: http://www.scl.rs/news/776-scl-seminar-by-milos-radonjic (2016-02-10)
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  • SCL seminar by Zarko Gacevic
    can be made to interact with one another forming quasi particles known as polaritons The properties of microcavities are exploited for realization of high spectral purity light emitting devices resonant cavity LEDs and vertical cavity surface emitting lasers as well as nearly zero threshold polariton lasers This talk will be focused on epitaxial fabrication of III nitride microcavities for applications in the violet blue spectral range During his visit to

    Original URL path: http://www.scl.rs/news/810-scl-seminar-by-zarko-gacevic (2016-02-10)
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  • SCL Seminar by Vladimir Juricic
    the concept of topological band insulators and then discuss the role of crystal symmetries in the physics of these states of quantum matter I will derive the classification of topological band insulators protected not only by time reversal but also by space group symmetries 2 I will show that there are three broad classes of topological states a Gamma states robust against general time reversal invariant perturbations b Translationally active states protected from elastic scattering but susceptible to topological crystalline disorder c Valley crystalline topological insulators sensitive to both non topological and crystalline disorder I will show how some of these states can be realized in two dimensions when the tight binding M B model originally introduced for the HgTe quantum wells is generalized to include longer range hoppings I will also discuss probing of these states by magnetic pi fluxes and lattice dislocations 3 Finally I will consider some experimental implications of our classification scheme 1 For recent reviews see M Z Hasan and C L Kane Rev Mod Phys 82 3045 2010 X L Qi and S C Zhang Rev Mod Phys 83 1057 2011 2 R J Slager A Mesaros V Juricic and J Zaanen Nature Physics

    Original URL path: http://www.scl.rs/news/841-scl-seminar-by-vladimir-juricic (2016-02-10)
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  • SCL Seminar by Nenad Vukmirovic
    the whole Brillouin zone will then be introduced The details of its implementation on high performance computing architectures will be discussed next The methodology was then used to gain insight into the nature of charge carriers in naphthalene crystal Our results suggest that the strength of electron phonon coupling is insufficient for formation of small polarons in crystalline naphthalene and other oligoacene semiconductors 1 1 N Vukmirovic C Bruder and

    Original URL path: http://www.scl.rs/news/843-scl-seminar-by-nenad-vukmirovic (2016-02-10)
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  • SCL Seminar by Antun Balaz
    Einstein condensate of Li 7 has been excited by a harmonic modulation of the atomic s wave scattering length Combining an analytical perturbative approach with extensive numerical simulations we will analyze the emerging nonlinear dynamics of the system on the mean field level at zero temperature We will present resulting excitation spectra and main nonlinear effects close to parametric resonances We will also discuss geometric resonances in BECs with two

    Original URL path: http://www.scl.rs/news/844-scl-seminar-by-antun-balaz-844 (2016-02-10)
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  • SCL Seminar by Stefan Milenkovic
    2013 Stefan Milenkovic from Free University Berlin visited SCL and gave a very interesting seminar on Molecular dynamics simulations of molecular transporters News 12 February 2016 SCL Seminar by Jelena Smiljanic 12 January 2016 In memoriam Nikola Buric 28 December 2015 SCL Seminar by Milos Radonjic 25 December 2015 SCL Seminar by Milan Radonjic 18 December 2015 SCL Seminar by Nenad Vukmirovic 11 December 2015 SCL Seminar by Marija Mitrović

    Original URL path: http://www.scl.rs/news/846-scl-seminar-by-stefan-milenkovic (2016-02-10)
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