Browsing Dept. of Physics - Master's degree by Title
Now showing items 17-36 of 170
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Calculation of masses of dark solitons in 1D Bose-Einstein condensates using Gelfand Yaglom method
(Bilkent University, 2016-11)Nonlinear excitations of Bose-Einstein condensates (BEC) play important role in understanding the dynamics of BECs. Solitons, shape preserving wave packets, are the most fundamental nonlinear excitations of BECs. They ... -
Characterization of photonic crystals at microwave frequencies
(Bilkent University, 1996)VVe investigated the surface reflection properties of layer-by-layer photonic crystals, for dielectric and metallic based photonic crystals. By using a FabryPerot cavity analogy with the reflection-phase information of ... -
Computational study of excitons and biexcitons in semiconductor core/shell nanocrystals of type I and type II
(Bilkent University, 2013)In this thesis, we studied electronic structure and optical properties of Type-I, Type-II, and quasi Type-II semiconductor nanocrystals (also known as colloidal quantum dots). For a parametric study, we developed quantum ... -
Construction of a scanning tunneling microscope and first results
(Bilkent University, 1990)In this thesis, construction of a Scanning Tunneling Microscope in air is explained. A step motor sample approach mechanism and a tripod scanner are used in the construction. Atomic resolution images of graphite samples ... -
Construction of an atomic force microscope operating in air and liquid
(Bilkent University, 2003)In this thesis, a new atomic force microscope capable of measuring in liquid and air has been introduced. The highly improved design of the instrument eliminates some of the technical problems which are occurred before. ... -
A continuum equation displaying Tracy-Widom distribution in the spatial and temporal fluctuations of growing interfaces
(Bilkent University, 2022-09)A wide variety of surface growth phenomena involves random processes that result in correlated stochastic dynamics. Such dynamics is most succinctly described by a nonlinear equation known as the Kardar-Parisi-Zhang (KPZ) ... -
Controlled lateral and perpendicular motion of atoms on metal surfaces
(Bilkent University, 1994)Nanoscale modification of matter has been the subject of interest. Recently, several experimental studies have demonstrated that by using a scanning tunneling microscope one can translate atoms on metal surfaces to a ... -
Correlation effects in coupled quantum-well and quantum-wire systems
(Bilkent University, 2001) -
Cumulants associated with geometric phases and their implementation in modern theory of crystalline polarization
(Bilkent University, 2022-09)Many fields have been influenced by Berry's geometric phase because of its physical meaning and observable effects. One of the breakthroughs that stem from geometric phases is the modern theory of polarization. The ... -
Dark current control in InAs/GaSb superlattice photodetectors
(Bilkent University, 2013)Bose-Einstein Condensation (BEC) was introduced by Einstein 1925. It took 70 years to confirm BEC by experiments. BEC creates a suitable environment to observe macroscopic-quantum behavior. Condensates consist of ultracold ... -
Dipolar bose-einstein condensate in a cylindrically symmetric trap
(Bilkent University, 2016-08)Bose-Einstein Condensate (BEC) and particularly its stability dynamics has been a subject to many investigations since the first realization of this new condensed state in alkali atoms interacting via short range potential. ... -
Dynamical effects of noise on nonlinear systems
(Bilkent University, 2014)Randomness and nonlinear dynamics consitute the most essential part of many events in nature. Therefore, a better and comprehensive understanding of them is a crucial step in describing natural phenomena as well as the ... -
Dynamics of a two leg ladder under a time dependent artificial magnetic field
(Bilkent University, 2019-09)Especially in the last two decades, there have been intensive theoretical and experimental studies on the periodically driven quantum systems. The reasons for these intensive studies are the emergence of new topological ... -
Dynamics of sliding and loading bilayer graphene
(Bilkent University, 2022-09)Sliding and loading bilayer graphene is investigated using the Tight Binding method. We develop interaction-distance dependent tight binding parameter functions to allow for the calculation of band structure for different ... -
Electronic and atomic processes in nanowires
(Bilkent University, 1996)The variation of conductance of a nanowire which is pulled between two metal electrodes has been the subject of dispute. Recent experimental set-ups using a combination of STM and AFM show that changes in conductivity ... -
Electronic structure of graphene nano-ribbons
(Bilkent University, 2008)Graphite is a known material to human kind for centuries as the lead of a pencil. Graphene as a two dimensional material, is the single layer of graphite. Many theoretical works have been done about it so far, however, ... -
Electronic structure of Si/Ge semiconductor superlattices
(Bilkent University, 1988)A brief review about the two dimensional electron systems and especially band offsets is given. The electronic properties of the Si„/Ge„(001) strained superlattices as a function of the superlattice periodicity and the ... -
Electrostatic correlations in inhomogeneous electrolytes
(Bilkent University, 2018-07)The field-theoretic approach is used to obtain the self-consistent equations for inhomogeneuos symmetric electrolytes. The perturbative Green's function method is used to solve these self-consistent equations for an ... -
Electrostatics of polymer translocation through membrane nanopores in electrolyte solutions
(Bilkent University, 2021-02)The transport of polymers across membranes in electrolyte solutions happens in most biological systems and is necessary for cells to function. Moreover, the poly-mer translocation process has proven to be very important ... -
Energy and angular momentum transfer with circular Rydberg states
(Bilkent University, 2017-08)Circular states belong to a class of Rydberg states having maximum angular momentum. These states, compared to other Rydberg states, have longer lifetimes, and in the classical limit resemble circular Bohr-like orbits. ...
