Browsing by Author "Tanatar, Bilal"
Now showing items 1-20 of 205
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Analysis of the phase lapse problem in closed interferometers
(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 local-field corrections in double-layer electron systems
(Academic Press, 1999)We develop an extension of the sum-rule version of the Singwi, Tosi, Land, and Sjolander (STLS) scheme applied to a double-layer electron system. We present analytical expressions for the intralayer and interlayer static ... -
Angular dependence of upper critical field in two-band Ginzburg-Landau theory
(Elsevier B.V., 2007)Generalization of two-band Ginzburg-Landau (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: Two-Band ginzburg-landau theory for layered superconductors
(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 two-band Ginzburg-Landau theory for layered ... -
Band-gap renormalization in quantum wire systems: dynamical correlations and multi-subband effects
(Institute of Physics Publishing, 2000)We study the band-gap renormalization m a model semiconductor quantum wire due to the exchange-correlation effects among the charge carriers. We construct a two-subband model for the quantum wire, and employ the GW-approximation ... -
Band-gap renormalization in quantum wires
(TÜBİTAK, 1999)Improved techniques in semiconductor fabrication increased the interest in quantum wire structures, because of their opto-electronic device application possibilities. Many-body interactions among the electrons and holes ... -
Band-gap renormalization in quasi-one-dimensional electron-hole systems
(Institute of Physics Publishing Ltd, 1996)We study the band-gap renormalization (BGR) in semiconductor quantum wires. Assuming an electron-hole system in quasi-equilibrium, we employ the random-phase approximation (RPA) and beyond (e.g., local-field corrections) ... -
Band-gap renormalization in quasi-one-dimensional systems
(Kluwer Academic Publishers, 1997) -
Bistable behavior of a two-mode Bose-Einstein condensate in an optical cavity
(IOP Institute of Physics Publishing, 2013-01-11)We consider a two-component Bose-Einstein condensate in a one-dimensional optical cavity. Specifically, the condensate atoms are taken to be in two degenerate modes due to their internal hyperfine spin degrees of freedom ... -
Bose-Einstein condensation in a one-dimensional interacting system due to power-law trapping potentials
(American Physical Society, 1999)We examine the possibility of Bose-Einstein condensation in one-dimensional 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 Gross-Pitaevskii ... -
Bose-Einstein condensation in a two-dimensional, trapped, interacting gas
(American Physical Society, 1998)We study the Bose-Einstein condensation phenomenon in a two-dimensional (2D) system of bosons subjected to a harmonic-oscillator-type confining potential. The interaction among the 2D bosons is described by a δ function ... -
Bose-Einstein condensation of noninteracting charged Bose gas in the presence of external potentials
(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, ... -
Characteristic temperatures of a triplon system of dimerized quantum magnets
(World Scientific, 2020)Exploiting the analogy between ultracold atomic gases and the system of triplons, we study magneto-thermodynamic properties of dimerized quantum magnets in the framework of Bose–Einstein condensation (BEC). Particularly, ... -
Charged bosons in a quasi-one-dimensional system
(American Physical Society, 2000)The ground-state properties of a system of charged bosons in a quasi-one-dimensional model with a neutralizing background are investigated within the hypernetted-chain approximation. Strong correlation effects drive the ... -
Coherent and incoherent transport through T-shaped double quantum dots
(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 double-wire electron-hole systems
(Institute of Physics Publishing Ltd., 1997)We investigate the collective excitations in a double-wire system of spatially separated electrons and holes. Self-consistent local-field factors are used to describe the exchange-correlation effects at low densities. ... -
Collective excitations and screened interactions in two-dimensional charged Bose systems
(Institute of Physics Publishing Ltd., 1995)We study the collective excitation spectrum of a two-dimensional charged Bose gas interacting via long- and short-range potentials. The resulting plasmon dispersions depend on the type of interaction. Extending our results ... -
Collective excitations in quasi-one-dimensional electron systems under a magnetic field
(American Physical Society, 1993)A study of the magnetoplasmons of a cylindrical quasi-one-dimensional electron system is given in the presence of an axial magnetic field B. A two-subband system is considered and the dispersion relations for both intrasubband ... -
Collective excitations of strongly coupled bilayer charged Bose liquids in the third-frequency-moment sum rule
(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 random-phase approximation (RPA), the ... -
Collective modes in a bilayer dipolar fermi gas and the dissipationless drag effect
(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 ...
