Browsing Department of Physics by Author "Tanatar, Bilal"
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Analysis of the phase lapse problem in closed interferometers
Tolea, M.; Moldoveanu, V.; Dinu, I. V.; Tanatar, Bilal (Elsevier B.V., 2012)We investigate the connection between the asymmetry of the Fano resonances in a mesoscopic interferometer with an embedded quantum dot and the π lapses in the phase of the bare dot transmittance. Consecutive Fano resonances ... 
Analytical expressions for the localfield corrections in doublelayer electron systems
Tanatar, Bilal (Academic Press, 1999)We develop an extension of the sumrule version of the Singwi, Tosi, Land, and Sjolander (STLS) scheme applied to a doublelayer electron system. We present analytical expressions for the intralayer and interlayer static ... 
Angular dependence of upper critical field in twoband GinzburgLandau theory
Askerzade, I. N.; Tanatar, Bilal (Elsevier B.V., 2007)Generalization of twoband GinzburgLandau (GL) theory to the case of anisotropic mass is presented. The temperature dependence of the anisotropy parameter of upper critical field γc 2 (T) = Hc 2∥ (T) / Hc 2⊥ (T) and angular ... 
Anisotropy of critical fields in MgB2: TwoBand ginzburglandau theory for layered superconductors
Askerzade, I. N.; Tanatar, Bilal (IOP Institute of Physics Publishing, 2009)The temperature dependence of the anisotropy parameter of upper critical field γHc2 (T) Hc2 (T)/Hc2 (T) and London penetration depth γλ(T) λ(T)/λ (T) are calculated using twoband GinzburgLandau theory for layered ... 
Bandgap renormalization in quantum wire systems: dynamical correlations and multisubband effects
Güven, K.; Tanatar, Bilal; Bennett, C. R. (Institute of Physics Publishing, 2000)We study the bandgap renormalization m a model semiconductor quantum wire due to the exchangecorrelation effects among the charge carriers. We construct a twosubband model for the quantum wire, and employ the GWapproximation ... 
Bandgap renormalization in quantum wires
Güven, K.; Bennett, C.R.; Tanatar, Bilal (1999)Improved techniques in semiconductor fabrication increased the interest in quantum wire structures, because of their optoelectronic device application possibilities. Manybody interactions among the electrons and holes ... 
Bandgap renormalization in quasionedimensional electronhole systems
Tanatar, Bilal (Institute of Physics Publishing Ltd, 1996)We study the bandgap renormalization (BGR) in semiconductor quantum wires. Assuming an electronhole system in quasiequilibrium, we employ the randomphase approximation (RPA) and beyond (e.g., localfield corrections) ... 
Bandgap renormalization in quasionedimensional systems
Tanatar, Bilal (Kluwer Academic Publishers, 1997) 
Bistable behavior of a twomode BoseEinstein condensate in an optical cavity
Safaei, S.; Mustecaplioglu, Ö. E.; Tanatar, Bilal (IOP Institute of Physics Publishing, 20130111)We consider a twocomponent BoseEinstein condensate in a onedimensional optical cavity. Specifically, the condensate atoms are taken to be in two degenerate modes due to their internal hyperfine spin degrees of freedom ... 
BoseEinstein condensation in a onedimensional interacting system due to powerlaw trapping potentials
Bayindir, M.; Tanatar, Bilal; Gedik, Z. (American Physical Society, 1999)We examine the possibility of BoseEinstein condensation in onedimensional interacting Bose gas subjected to confining potentials of the form V ext(x) = V 0(x/a) γ, in which γ<2, by solving the GrossPitaevskii ... 
BoseEinstein condensation in a twodimensional, trapped, interacting gas
Bayindir, M.; Tanatar, Bilal (American Physical Society, 1998)We study the BoseEinstein condensation phenomenon in a twodimensional (2D) system of bosons subjected to a harmonicoscillatortype confining potential. The interaction among the 2D bosons is described by a δ function ... 
BoseEinstein condensation of noninteracting charged Bose gas in the presence of external potentials
Bayindir, M.; Tanatar, Bilal (Elsevier Science Publishers B.V., 2001)We investigate thermodynamic properties of noninteracting charged bosons in the presence of externally applied electric and magnetic fields. Using the semiclassical density of states, we obtain the condensate fraction, ... 
Charged bosons in a quasionedimensional system
Tanatar, Bilal; Davoudi, B.; Kohandel, M. (American Physical Society, 2000)The groundstate properties of a system of charged bosons in a quasionedimensional model with a neutralizing background are investigated within the hypernettedchain approximation. Strong correlation effects drive the ... 
Coherent and incoherent transport through Tshaped double quantum dots
Moldoveanu, V.; Ţolea, M.; Tanatar, Bilal (Elsevier B.V., 2008)We investigate the measurement induced dephasing of the Fano effect in the electronic transport through a double quantum dot mesoscopic interferometer coupled to a charge detector. The current and the differential conductance ... 
Collective excitations and instabilities in doublewire electronhole systems
Mutluay, N.; Tanatar, Bilal (Institute of Physics Publishing Ltd., 1997)We investigate the collective excitations in a doublewire system of spatially separated electrons and holes. Selfconsistent localfield factors are used to describe the exchangecorrelation effects at low densities. ... 
Collective excitations and screened interactions in twodimensional charged Bose systems
Tanatar, Bilal; Das, A. K. (Institute of Physics Publishing Ltd., 1995)We study the collective excitation spectrum of a twodimensional charged Bose gas interacting via long and shortrange potentials. The resulting plasmon dispersions depend on the type of interaction. Extending our results ... 
Collective excitations in quasionedimensional electron systems under a magnetic field
Tanatar, Bilal; Constantinou, N. C. (American Physical Society, 1993)A study of the magnetoplasmons of a cylindrical quasionedimensional electron system is given in the presence of an axial magnetic field B. A twosubband system is considered and the dispersion relations for both intrasubband ... 
Collective excitations of strongly coupled bilayer charged Bose liquids in the thirdfrequencymoment sum rule
Tas, M.; Tanatar, Bilal (The American Physical Society, 2008)We calculate the collective excitation modes of strongly coupled bilayer charged Bose systems. We employ the dielectric matrix formulation to study the correlation effects within the randomphase approximation (RPA), the ... 
Collective modes in a bilayer dipolar fermi gas and the dissipationless drag effect
Tanatar, Bilal (Springer, 2013)We consider the collective modes of a bilayer dipolar Fermi system in which the particles interact via long range (∼1/r 3) interaction. Assuming that each layer has a background flow which varies little and that the dynamics ... 
Collective modes in a quasionedimensional, twocomponent electron liquid
Tanatar, Bilal (Pergamon Press, 1994)Under favorable conditions, a new collective mode besides the usual plasmons may exist in degenerate electronhole liquids. We calculate the dispersion and damping of this new mode (called the acoustic plasmon mode) in a ...