Linewidth of the IR Modes as a Function of Temperature in DMMG and DMCD

Kurt, Arzu
Yurtseven, Hasan Hamit
Kurt, Mustafa
Turkish Physical Society 34th International Physics Congress, (5 - 09 Eylül 2018)


KARACALİ, HUSEYİN; Yurtseven, Hasan Hamit (World Scientific Pub Co Pte Lt, 2011-03-20)
We derive an expression for the linewidth of phonons involved in the order phase transitions in solids. The linewidth is obtained as a function of the dwell time from which the activation energy can be computed. A new viewpoint is presented on the assumption that the fluctuations in the random variable of the noise, which is carried by the random particles involved in the order disorder mechanism, affect the linewidth of the phonons.
Frequency invariant beamforming and its application to wideband direction of arrival estimation
Babataş, Eren; Candan, Çağatay; Department of Electrical and Electronics Engineering (2008)
In this thesis the direction of arrival estimation of wideband signals using frequency invariant beamforming method is examined. The difficulty with the direction of arrival estimation of wideband signals is that it is not possible to obtain a single covariance matrix valid for the whole frequency spectrum of the signal. There are various methods proposed in the literature to overcome this difficulty. The common aim of all the methods is to obtain a composite covariance matrix for the overall band of the si...
Waveguide filters using angular-step discontinuities.
Benmair, Yusuf; Department of Electrical Engineering (1968)
Phase-space window and degrees of freedom of optical systems with multiple apertures
Ozaktas, Haldun M.; Öktem, Sevinç Figen (The Optical Society, 2013-04-01)
We show how to explicitly determine the space-frequency window (phase-space window) for optical systems consisting of an arbitrary sequence of lenses and apertures separated by arbitrary lengths of free space. If the space-frequency support of a signal lies completely within this window, the signal passes without information loss. When it does not, the parts that lie within the window pass and the parts that lie outside of the window are blocked, a result that is valid to a good degree of approximation for ...
Frequency Selective Characteristics of a Plasma Layer with Sinusoidally Varying Electron Density Profile
GÜREL, ÇİĞDEM SEÇKİN; Oencue, Emrah (Springer Science and Business Media LLC, 2009-06-01)
In this study reflection, absorbtion and transmission characteristics of a plasma layer having sinusoidally varying electron number density are analysed. In the analysis, plasma layer is divided into thin subslabs with constant electron number densities. The general frequency selective behavior of the plasma is investigated by varying the plasma parameters, external magnetic field excitation and sinusoidal electron distribution in order to be used in recent plasma applications.
Citation Formats
A. Kurt, H. H. Yurtseven, and M. Kurt, “Linewidth of the IR Modes as a Function of Temperature in DMMG and DMCD,” presented at the Turkish Physical Society 34th International Physics Congress, (5 - 09 Eylül 2018), Bodrum, Türkiye, 2018, Accessed: 00, 2021. [Online]. Available: