Now showing items 21-34 of 34

    • Nonequilibrium fractional Hall response after a topological quench 

      Ünal, F. N.; Mueller, E. J.; Oktel, M. O. (American Physical Society, 2016)
      We theoretically study the Hall response of a lattice system following a quench where the topology of a filled band is suddenly changed. In the limit where the physics is dominated by a single Dirac cone, we find that the ...
    • ODTü Fizik Bölümü Tarihi 

      Ulu, Bora; Turan, Eray; Ünal, Batuhan Kürşat; Demir, İrem; Dal, Deniz (Bilkent University, 2018)
      Orta Doğu Teknik üniversitesi 15 Kasım 1956 tarihinde Orta Doğu Yüksek Teknoloji Enstitüsü adı altında kuruldu. ODTü Fizik Bölümü ise 1960 yılında kurulmuştur. Bu çalışmada bölümün kuruluşundan itibaren öğretim üyeleri, ...
    • On existence of an x-integral for a semi-discrete chain of hyperbolic type 

      Zheltukhin, K.; Zheltukhina, Natalya (IOP, 2016)
      A class of semi-discrete chains of the form t1x = f (x,t,t1,tx) is considered. For the given chains easily verifiable conditions for existence of x-integral of minimal order 4 are obtained.
    • On the stabilization of periodic orbits for discrete time chaotic systems 

      Morgül, Ö. (Elsevier, 2005-02)
      In this Letter we consider the stabilization problem of unstable periodic orbits of discrete time chaotic systems. We propose a novel and simple periodic delayed feedback law and present some stability results. These results ...
    • Pentagonal nanowires: a first-principles study of the atomic and electronic structure 

      Sen, P.; Gülseren, O.; Yildirim, T.; Batra, I. P.; Çıracı, Salim (American Physical Society, 2002)
      We performed an extensive first-principles study of nanowires in various pentagonal structures by using pseudopotential plane wave method within the density functional theory. Our results show that nanowires of different ...
    • Planck, Kuhn, and scientific revolutions 

      Gernand, Herbert W. (1986)
    • The power of physical representations 

      Akman, V.; ten Hagen, P. J. W. (AAAI Press, 1989)
      Commonsense reasoning about the physical world, as exemplified by 'Iron sinks in water' or 'If a ball is dropped it gains speed,' will be indispensable in future programs. We argue that to make such predictions (namely, ...
    • Reversible band-gap engineering in carbon nanotubes by radial deformation 

      Gülseren, O.; Yildirim, T.; Çıracı, Salim; Kılıç, Ç. (American Physical Society, 2002-03)
      We present a systematic analysis of the effect of radial deformation on the atomic and electronic structure of zigzag and armchair single wall carbon nanotubes using the first-principle plane wave method. The nanotubes ...
    • Slicing crystalline silicon wafer by deep subsurface laser processing and selective chemical etching 

      Borra, M. Z.; Nasser, H.; Çiftpınar, E. H.; Turnalı, Ahmet; Deminskyi, Petro; Çolakoğlu, T.; Tokel, Onur; İlday, Fatih Ömer; Pavlov, I.; Turan, R.; Bek, A. (Institute of Electrical and Electronics Engineers Inc., 2019)
      In this work, we demonstrate use of laser-induced silicon slicing (LASIS) technique to fabricate crystalline silicon (c-Si) slices [1]. In LASIS method, a nanosecond-pulsed fiber laser operating at 1.55 μm wavelength, ...
    • Spin-dependent analysis of two-dimensional electron liquids 

      Bulutay, C.; Tanatar, Bilal (The American Physical Society, 2002)
      Two-dimensional electron liquid (2D EL) at full Fermi degeneracy is revisited, giving special attention to the spin-polarization effects. First, we extend the recently proposed classical-map hypernetted-chain (CHNC) technique ...
    • A switching synchronization scheme for a class of chaotic systems 

      Morgül, Ö.; Akgül, M. (Elsevier, 2002)
      In this Letter, we propose an observer-based synchronization scheme for a class of chaotic systems. This class of systems are given by piecewise-linear dynamics. By using some properties of such systems, we give a procedure ...
    • Tunable adsorption on carbon nanotubes 

      Gülseren, O.; Yildirim, T.; Çıracı, Salim (American Physical Society, 2001)
      We investigated the adsorption of a single atom, hydrogen and aluminum, on single-wall carbon nanotubes from first principles. The adsorption is exothermic, and the associated binding energy varies inversely as the radius ...
    • Ultrafast burst-mode fiber lasers: source development and material processing 

      İlday, F. Ömer (IEEE, 2015)
      High-precision processing of materials with ultrafast laser pulses is drawing increasing attention as laser sources are finally catching up with industry requirements. In particular, very rapid progress has been achieved ...