• Testing of Kerr black hole with quintessential dark energy through observational data by using quasi-periodic oscillations 

  Liu, Yong; Mustafa G.; Maurya S.K.; Yıldız, G.D. Açan; Güdekli, Ertan (Elsevier B.V., 2023)

  A viable method to examine the wide range of intriguing phenomena that occur in a strong gravity regime is the study of the quasi-periodic oscillations (QPOs) of X-ray flux seen in stellar-mass black hole (BH) binaries. ...

• Periodic and solitary waves of the nonlinear Konno–Oono model: generalized methods 

  Hosseini, K.; Sadri, K.; Hincal, E.; Abbasi, A.; Baleanu, D.; Salahshour, S. (Springer, 2023)

  There has been considerable academic interest in the study of nonlinear dynamical models and their exact traveling waves over the past few years. The main aim of the present paper is to consider a nonlinear dynamical model ...

• Quantum boomerang effect: Beyond the standard Anderson model 

  Tessieri, L.; Akdeniz, Z.; Cherroret, N.; Delande, D.; Vignolo, P. (American Physical Society, 2021)

  It was recently shown that wavepackets with a skewed momentum distribution exhibit a boomeranglike dynamics in the Anderson model due to Anderson localization: after an initial ballistic motion, they make a U-turn and ...

• Investigation of particle size effect on film formation of polystyrene latexes using fluorescence technique 

  Uğur, Şaziye; Sunay, M. Selin (Elsevier Science Bv, 2016)

  This study reports the particle size effects on the film formation behavior of pyrene labeled polystyrene (PS) latexes by a combination of steady state fluorescence (SSF), UV-vis (UVV) and atomic force microscopy (AFM) ...

• Structural characterization, solvent effects on nuclear magnetic shielding tensors, experimental and theoretical DFT studies on the vibrational and NMR spectra of 3-(acrylamido)phenylboronic acid 

  Alver, Özgür; Kaya, Mehmet Fatih; Dikmen, G. (Elsevier, 2015)

  Structural elucidation of 3-(acrylamido)phenylboronic acid (C9H10BNO3) was carried out with 1H, 13C and HETCOR NMR techniques. Solvent effects on nuclear magnetic shielding tensors were examined with deuterated dimethyl ...

• Investigation of vibrational, elastic and dielectric properties of cubic gauche nitrogen (cg-N) 

  Akay, Özge; Yurtseven, Hamit (Elsevier GmbH, 2021)

  Vibrational, elastic and dielectric properties of the cubic gauche nitrogen (cg-N) are investigated by analyzing the Raman optic and zone-center phonon modes using the literature data. From the pressure dependence of those ...

• Structure and Raman Spectra in Cryolitic Melts: Simulations with an ab Initio Interaction Potential 

  Çıkıt, Serpil; Akdeniz, Zehra; Madden, Paul A. (Amer Chemical Soc, 2014)

  The Raman spectra of cryolitic melts have been calculated from molecular dynamics computer simulations using a polarizable ionic potential obtained by force-fitting to ab initio electronic structure calculations. Simulations ...

• Condensation of two-dimensional harmonically confined bosons with Bessel-type interactions 

  Mese, A. I.; Capuzzi, P.; Aktaş, Saban; Akdeniz, Zehra; Okan, S. Erol (Amer Physical Soc, 2011)

  We study the ground-state configurations of few interacting bosons confined in two dimensions by anisotropic harmonic potentials. By means of variational calculations, including correlation effects, we show that the ...

• Localization-delocalization transition in the random dimer model 

  Schaff, Jean-Francois; Akdeniz, Zehra; Vignolo, Patrizia (Amer Physical Soc, 2010)

  The random-dimer model is probably the most popular model for a one-dimensional disordered system where correlations are responsible for delocalization of the wave functions. This is the primary model used to justify the ...

• Dynamical instability of a boson-fermion mixture at low dimensions 

  Akdeniz, Zehra; Vignolo, P. (Elsevier Science Bv, 2009)

  We examine theoretically the dynamical response of a homogeneous mixture of condensed bosons and spin-polarized fermions confined inside a quasi-two-dimensional or a quasi-one-dimensional geometry, considering quasi-thre ...

• Condensate oscillations oscillations in a Penrose tiling lattice 

  Akdeniz, Zehra; Vignolo, P. (Elsevier Science Bv, 2017)

  We study the dynamics of a Bose-Einstein condensate subject to a particular Penrose tiling lattice. In such a lattice, the potential energy at each site depends on the neighbour sites, accordingly to.the model introduced ...

• Anderson localization in optical lattices with speckle disorder 

  Sucu, Serpil; Aktaş, Saban; Okan, S. Erol; Akdeniz, Zehra; Vignolo, Patrizia (Amer Physical Soc, 2011)

  We study the localization properties of noninteracting waves propagating in a speckle-like potential superposed on a one-dimensional lattice. Using a combined decimation-renormalization procedure, we estimate the localization ...

• Calculation of the inverse relaxation time and the activation energy as a function of temperature for the Raman modes close to the phase transitions in solid nitrogen 

  Yurtseven, Hamit; Akay, Özge (Elsevier, 2021)

  The inverse relaxation time is calculated as a function of temperature for the transitions of alpha - beta (P = 0) and epsilon-delta(loc)-delta (at constant pressures) in the solid N-2. For this calculation, the observed ...

• Liquid-(Solid plus Liquid) Transitions in a Two-Component System of (CH3)CCl3 + CCl4 

  Yurtseven, Hamit; Akay, Özge (Springer/Plenum Publishers, 2020)

  Liquid-(solid + liquid) transitions are studied in (CH3)CCl3 + CCl4 by using the Landau phenomelogical model. The Gibbs energy is expanded in terms of the orientational disorder (OD) parameters for the transitions of the ...

• Calculation of the Raman and IR frequencies from the volume data at high pressures in N-2 

  Akay, Özge; Yurtseven, Hamit (Elsevier Gmbh, Urban & Fischer Verlag, 2018)

  Raman and IR frequencies of N-2 in the molecular state are calculated as a function of pressure up to 160 GPa by using the volume data from the literature through the mode Gruneisen parameter. By determining the Gruneisen ...

• Fluorescence study of film formation from PS/Al2O3 nanocomposites 

  Pekcan, Önder; Ugur, Şaziye; Sunay, M. Selin (Elsevier Science Sa, 2014)

  Steady state fluorescence (SSF) and UV-vis (UVV) techniques were used to study the film formation behavior of pyrene (P) labeled polystyrene (PS) latex and Al2O3 (PS/Al2O3) composites depending on PS particles size and ...

• Calculation of the thermodynamic functions from the Raman frequency shifts close to the epsilon - delta(loc) - delta transitions and Pippard relations in nitrogen 

  Akay, Özge; Yurtseven, Hamit (World Scientific Publ Co Pte Ltd, 2020)

  Thermodynamic functions of the thermal expansion (alpha(p)), isothermal compressibility (kappa(T)) and the difference in the heat capacity (C-p - C-v) are calculated as a function of temperature (P = 18 GPa) close to the ...

• Raman bandwidths calculated for the librational ( a -phase) and internal (8, d loc and d phases) modes in solid N 2 using pseudospin-phonon coupling (PS) and energy-fluctuation (EF) models 

  Yurtseven, Hamit; Akay, Özge (Elsevier, 2020)

  [No Abstract Available]

• Calculation of the Raman frequency and linewidth of vibrons using anharmonic self energy model for the epsilon , delta(loc) and delta phases in solid nitrogen 

  Akay, Özge; Yurtseven, Hamit (Elsevier Gmbh, 2020)

  Temperature dependences of the Raman frequency shifts and linewidths of vibrons nu(1), nu(2) and nu(22) are calculated from the anharmonic self energy in the epsilon, delta(loc) (localized delta) and delta phases of solid ...

• Calculation of the Thermodynamic Functions Using A Mean Field Model For the Fluid-Solid Transition in Nitrogen 

  Akay, Özge; Yurtseven, Hamit (Editura Acad Romane, 2020)

  Temperature and pressure dependence of the thermodynamic quantities are calculated using the Landau phenomenological model for the first order fluid-solid transition in nitrogen. This calculation is performed by fitting ...

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