Browsing by Author "Akdeniz, Zehra"
Now showing items 1-17 of 17
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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 ... -
Chemical Reactivity Perspective into the Group 2B Metals Halides
Özen, Alimet Sema; Akdeniz, Zehra (Amer Chemical Soc, 2016)Chemical reactivity descriptors within the conceptual density functional theory can be used to understand the nature of the interactions between two monomers of the Group 2B metal halides. This information might be valuable ... -
Combined DFT and ionic model computational study of the effect of alkali metal cations on the structure, bonding and properties of molten cryolites, M3AlF6 (M = li, Na, K, Rb, and Cs)
Özen, Alimet Sema; Akdeniz, Zehra (Taylor and Francis Ltd., 2024)Ionic melts, in the form of ionic liquids and molten salts, are important in many technological aspects such as metal production and energy applications. Cryolite melts constitute an important family especially for the ... -
A computational perspective on meta-Fibonacci recurrence relations
Alkan, Altuğ (Piri Reis Üniversitesi, 2021)Bu doktora tezinde, bir bilgisayar cebir sistemi olan PARI/GP ile sağlanan detaylı hesaplamalı araştırmalar sayesinde meta-Fibonacci tekrarlama ilişkileri kavramını yeni bir yaklaşımla keşfediyoruz. İç içe geçmiş tekrarlama ... -
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 ... -
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 ... -
Dissolution of alumina in cryolite melts: a conceptual DFT study
Özen, Alimet Sema; Akdeniz, Zehra (Tübitak, 2022)Interactions between alumina and cryolite clusters were investigated using chemical reactivity descriptors based on conceptual DFT such as global hardness, η, global softness, S, fukui functions, f, and local softness, s. ... -
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 ... -
An exploration of solutions to two related Hofstadter-Huber recurrence relations
Alkan, Altuğ; Fox, Nathan; Aybar, Orhan Özgür; Akdeniz, Zehra (Pergamon-Elsevier Science Ltd, 2020)In this study, we explore the properties of certain solutions of two Hofstadter-Huber recurrence relations. The first is Hofstadter's V-recurrence, which is defined by the nested recurrence relation V(n) = V(n - V (n - 1)) ... -
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 ... -
The origins of tetrahedral coordination in molten and glassy ZnCl2 and other group-2B metal dihalides
Özen, Alimet Sema; Akdeniz, Zehra; Ruberto, R.; Pastore, G.; Tosi, M. P. (Elsevier, 2014)We report the results of first-principles calculations carried out within a relativistic density-functional method, on the molecular trimers of the MX2 compounds (with M = Zn or Cd and X = Cl, Br, or I), showing how a ... -
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 ... -
Spin-charge separation in the quantum boomerang effect
Capuzzi, Pablo; Tessieri, Luca; Akdeniz, Zehra; Minguzzi, Anna; Vignolo, Patrizia (American Physical Society, 2024)We study the localization dynamics of a SU(2) fermionic wave packet launched in a (pseudo)random potential. We show that, in the limit of strong intercomponent repulsions, the total wave packet exhibits a boomeranglike ... -
Static and dynamic structure of monomers, dimers and trimers of HgCl2 from density-functional calculations
Ruberto, R.; Pastore, G.; Özen, Alimet Sema; Akdeniz, Zehra; Tosi, M. P. (Springer, 2012)We report relativistic density-functional calculations for the equilibrium structures and the vibrational frequencies of the (HgCl2)(n) molecules with n = 1 to 3, as part of a broad exploration of the potential energy ... -
Structure and bonding in cryolitic melts a combined study by density functional theory and ionic model calculations
Sema Özen, Alimet; Akdeniz, Zehra (Elsevier, 2022)Present study aims to analyze the nature of the bonding of ion pairs and formation of Al(III) fluorocomplexes by discussing the detailed ion pair interactions for various microclusters on AlF3/NaF solutions (cryolitic ... -
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 ... -
Structure of trimers of group-2B metal dihalides from relativistic density-functional calculations
Özen, Alimet Sema; Akdeniz, Zehra; Pastore, G.; Ruberto, R.; Tosi, M. P. (Taylor & Francis Ltd, 2015)We report density-functional calculations, carried out in a quantum-chemical approach using localised-Gaussians expansions of the Kohn-Sham orbitals, for metal dihalides trimers (MX2)(3), where X=Cl, Br, or I and M=Zn, Cd, ...
