Now showing items 1-20 of 23

    • Active physics 

      Eisenkraft, Arthur (It's About Time, 2016)
    • Anti-de sitter-wave solutions of higher derivative theories 

      Gürses, M.; Hervik, S.; Şişman, T. Ç.; Tekin, B. (American Physical Society, 2013)
      We show that the recently found anti-de Sitter (AdS)-plane and AdS-spherical wave solutions of quadratic curvature gravity also solve the most general higher derivative theory in D dimensions. More generally, we show that ...
    • Archimedes' principle as an application of the divergence theorem 

      Altintas, A. (Institute of Electrical and Electronics Engineers, 1990)
      A derivation is provided that allows one to obtain Archimedes' principle as an application of the divergence theorem.
    • Beaming of light and enhanced transmission via surface modes of photonic crystals 

      Bulu, I.; Caglayan, H.; Ozbay, E. (Optical Society of America, 2005-11-15)
      We report beaming and enhanced transmission of electromagnetic waves by use of surface corrugated photonic crystals. The modes of a finite-size photonic crystal composed of dielectric rods in free space have been analyzed ...
    • Conductance of ferromagnetic nanowires 

      Mehrez, H.; Ciraci, S. (American Physical Society, 1998)
      The conductance distribution obtained from an ensemble of stretching ferromagnetic nanowires or point contacts do not exhibit peaks near the integer multiples of 2e2/h. This observation has been interpreted as the absence ...
    • Diodelike asymmetric transmission of linearly polarized waves using magnetoelectric coupling and electromagnetic wave tunneling 

      Mutlu, M.; Akosman, A. E.; Serebryannikov, A. E.; Ozbay, E. (American Physical Society, 2012-05-24)
      An asymmetric, reciprocal, diffraction-free transmission of linearly polarized waves in a new diodelike, three-layer, ultrathin, chiral structure is studied theoretically and experimentally. The exploited physical mechanism ...
    • Effective mass calculations for two-dimensional gas of dipolar fermions 

      Seydi, I.; Abedinpour, S. H.; Tanatar, B. (Springer New York LLC, 2017)
      We consider a two-dimensional system of ultracold dipolar fermions with dipole moments aligned in the perpendicular direction. We use the static structure factor information from Fermi-Hypernetted-Chain calculations to ...
    • Exohydrogenated single-wall carbon nanotubes 

      Yildirim, T.; Gülseren, O.; Ciraci, S. (American Physical Society, 2001)
      An extensive first-principles study of fully exohydrogenated zigzag (n,0) and armchair (n,n) single-wall carbon nanotubes (CnHn), polyhedral molecules including cubane, dodecahedrane, and C60H60 points to crucial differences ...
    • First-principles investigation of structural and electronic properties of solid cubane and its doped derivatives 

      Yildirim, T.; Ciraci, S.; Kılıç, Ç.; Buldum, A. (American Physical Society, 2000)
      The electronic and structural properties of molecular and solid cubane have been studied by first-principles, self-consistent field total energy calculations. Calculated molecular properties such as equilibrium geometry ...
    • First-principles study of the iron pnictide superconductor BaFe2 As2 

      Aktürk, E.; Ciraci, S. (American Physical Society, 2009)
      This paper presents our study on the atomic, electronic, magnetic structures, and phonon modes of the low-temperature orthorhombic phase of undoped BaFe2As2 crystal. The electronic structure is characterized by a sharp ...
    • Inflation and inflation uncertainty: a dynamic framework 

      Berument, M. H.; Yalcin, Y.; Yildirim J. (Elsevier BV, 2012)
      This paper aims to investigate the direct relationship between inflation and inflation uncertainty by employing a dynamic method for the monthly country-region-place United States data for the time period 1976-2007. While ...
    • A measurable force driven by an excitonic condensate 

      Hakioǧlu, T.; Özgün, E.; Günay, M. (American Institute of Physics Inc., 2014)
      Free energy signatures related to the measurement of an emergent force (≈10-9N) due to the exciton condensate (EC) in Double Quantum Wells are predicted and experiments are proposed to measure the effects. The EC-force is ...
    • Metal-insulator transition induced by random dipoles 

      Larcher, M.; Menotti, C.; Tanatar, B.; Vignolo, P. (American Physical Society, 2013)
      We study the localization properties of a test dipole feeling the disordered potential induced by dipolar impurities trapped at random positions in an optical lattice. This random potential is marked by correlations which ...
    • 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 ...
    • On existence of an x-integral for a semi-discrete chain of hyperbolic type 

      Zheltukhin K.; Zheltukhina N. (Institute of Physics Publishing, 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. © Published under licence by IOP ...
    • 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.; Ciraci, S. (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 ...
    • 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.; Ciraci, S.; 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 ...
    • Spin-dependent analysis of two-dimensional electron liquids 

      Bulutay, C.; Tanatar, B. (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 ...