Browsing by Author "Akdeniz, Zehra"
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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 specklelike potential superposed on a onedimensional lattice. Using a combined decimationrenormalization 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 metaFibonacci recurrence relations
Alkan, Altuğ (Piri Reis Üniversitesi, 2021)Bu doktora tezinde, bir bilgisayar cebir sistemi olan PARI/GP ile sağlanan detaylı hesaplamalı araştırmalar sayesinde metaFibonacci 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 BoseEinstein 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 twodimensional harmonically confined bosons with Besseltype interactions
Mese, A. I.; Capuzzi, P.; Aktaş, Saban; Akdeniz, Zehra; Okan, S. Erol (Amer Physical Soc, 2011)We study the groundstate 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 bosonfermion 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 spinpolarized fermions confined inside a quasitwodimensional or a quasionedimensional geometry, considering quasithre ... 
An exploration of solutions to two related HofstadterHuber recurrence relations
Alkan, Altuğ; Fox, Nathan; Aybar, Orhan Özgür; Akdeniz, Zehra (PergamonElsevier Science Ltd, 2020)In this study, we explore the properties of certain solutions of two HofstadterHuber recurrence relations. The first is Hofstadter's Vrecurrence, which is defined by the nested recurrence relation V(n) = V(n  V (n  1)) ... 
Localizationdelocalization transition in the random dimer model
Schaff, JeanFrancois; Akdeniz, Zehra; Vignolo, Patrizia (Amer Physical Soc, 2010)The randomdimer model is probably the most popular model for a onedimensional 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 group2B metal dihalides
Özen, Alimet Sema; Akdeniz, Zehra; Ruberto, R.; Pastore, G.; Tosi, M. P. (Elsevier, 2014)We report the results of firstprinciples calculations carried out within a relativistic densityfunctional 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 Uturn and ... 
Spincharge 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 densityfunctional calculations
Ruberto, R.; Pastore, G.; Özen, Alimet Sema; Akdeniz, Zehra; Tosi, M. P. (Springer, 2012)We report relativistic densityfunctional 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 forcefitting to ab initio electronic structure calculations. Simulations ... 
Structure of trimers of group2B metal dihalides from relativistic densityfunctional calculations
Özen, Alimet Sema; Akdeniz, Zehra; Pastore, G.; Ruberto, R.; Tosi, M. P. (Taylor & Francis Ltd, 2015)We report densityfunctional calculations, carried out in a quantumchemical approach using localisedGaussians expansions of the KohnSham orbitals, for metal dihalides trimers (MX2)(3), where X=Cl, Br, or I and M=Zn, Cd, ...