Browsing Dept. of Physics - Ph.D. / Sc.D. by Title
Now showing items 61-73 of 73
-
Silicon based dielectrics : growth, characterization, and applications in integrated optics
(Bilkent University, 2005)In recent years, growing attention has been paid to silicon based dielectrics, such as silicon oxynitrides, silicon nitrides, and semiconductor doped silicon oxides, all combined under the name silica on silicon technology. ... -
Silicon nanowire-based complex structures : A Large-scale atomistic electronic structure and ballistic transport
(Bilkent University, 2014)While the hierarchical assembling as well as the dramatic miniaturization of Si nanowires (NWs) are on-going, an understanding of the underlying physics is of great importance to enable custom design of nanostructures ... -
Size controlled germanium nanocrystals in dielectrics : structural and optical analysis and stress evolution
(Bilkent University, 2017-09)Group IV semiconductor nanocrystals, namely silicon and germanium have attracted much interest in the past two decades due to their broad applications in photovoltaic, memory, optoelectronic, medical imaging and ... -
Spintronic properties of carbon and silicon based nanostructures
(Bilkent University, 2007)In this thesis, nanostructures which may display novel spintronic behaviors are revealed and their properties are investigated by using first-principles methods. We have concentrated on three different systems, namely ... -
Strongly correlated models of high-temperature superconductivity
(Bilkent University, 1999)Son zamanlarda nanometrc büyüklüğündeki örneklerle ya|)dan tek ek'ktron ta.^ınma deneyleri, üstün iletkenlerin büyüklüklerinin alt sının ile ilgili soruyu yeniden gündeme getirmiştir, iler ne kadar, belirsiz tanecik ... -
Structural and electronic properties of carbon-based materials
(Bilkent University, 2000)In this thesis, some carbon-based materials in nano scale have been investigated by using first-principles methods as well as transferable tight-binding and empirical potential models. The focus of interest has been in ... -
Superconducting systems of low dimensionality
(Bilkent University, 1992)It is possible to call the last five years as the golden age of superconductivity. The two most important developments in the field are the discovery of copper oxide and fullerene superconductors. In this work, some ... -
A theoretical study of strained monolayer transition metal dichalcogenides based on simple band structures
(Bilkent University, 2019-11)This doctoral thesis deals with optoelectronic and geometric band properties of two-dimensional transition metal dichalcogenides (TMDs) under applied strain. First, we analyze various types of strain for the K valley ... -
Theory of atomic scale friction
(Bilkent University, 1998)Friction is an old and important but at the same time very complex physical event. This thesis aims to develop an atomic scale theory of friction. VVe investigate various atomic processes and stick-slip motion by using ... -
Titanium dioxide nanostructures for photocatalytic and photovoltaic applications
(Bilkent University, 2008)In this thesis, TiO2 nanostructures and their photocatalytic and photovoltaic ap- plications have been investigated by using the ¯rst-principles calculations based on density functional theory. We have concentrated on ... -
Topological aspects of charge transport in quantum many-body systems
(Bilkent University, 2019-02)Motivated by the recent proposals and developments of topological insulators and topological superconductors for their potential applications in electronic devices and quantum computing, we have theoretically studied ... -
Ultra-low noise fiber laser systems and their applications
(Bilkent University, 2014)Fiber laser systems are intensely studied for and already utilized in a wide range of scientific, biomedical and industrial applications. Scientifically, fiber lasers are widely used for spectroscopy, laser-matter ... -
Unconventional superconductivity in two dimensional time reversal symmetric noncentrosymmetric superconductors
(Bilkent University, 2017-09)In this thesis we study unconventional pairing observed in noncentrosymmetric superconductors by using spin dependent pairing potentials under the maximal C∞v and the time reversal symmetries (Θ-phase). The lack of ...
