Localized orbital description of electronic band structures, alloys, vacancies in semiconductors.

Erbarut, Erkan


Impurities in semiconductors.
Tuncay, Çağlar; Tomak, Mehmet; Department of Physics (1984)
Weighted multi-visibility analysis on directional paths
Şeker, Çağıl; Toprak, Vedat; Department of Geodetic and Geographical Information Technologies (2010)
Visibility analysis is an important GIS tool that is used in a diverse array of disciplines ranging from earth sciences to telecommunications. Multi-visibility, as a cumulative type of visibility, combines many point-to-point results into a multi-value array. Points, lines, or areas can be used as sources or targets; and the combined values can be calculated in both ways. Through multi-visibility, a special 2.5D visibility value surface can be constructed over a digital elevation model. The effectiveness of...
Dark electrical conductivity and photoconductivity of Ga(4)Se(3)S layered single crystals
QASRAWI, ATEF FAYEZ HASAN; Hasanlı, Nızamı (2008-11-01)
Ga(4)Se(3)S layered crystals were studied through the dark electrical conductivity, and illumination- and temperature-dependent photoconductivity in the temperature region of 100-350 K. The dark electrical conductivity reflected the existence of two energy states located at 3 10 and 60 meV being dominant above and below 170 K, respectively. The photoconductivity measurements revealed the existence of another two energy levels located at 209 and 91 meV above and below 230 K. The photoconductivity was observe...
Optical and electrical characterization of Ga0.75In0.25Se layered single crystals
Işık, Mehmet; Hasanlı, Nızamı; Department of Physics (2013)
In the present thesis, optical and electrical properties of Ga0.75In0.25Se layered single crystals have been studied. The optical properties of the crystals have been investigated by means of visible and infrared reflectivity and transmittance, ellipsometry, Raman spectroscopy, photoluminescence (PL) and thermoluminescence (TL) measurements. The analysis of the absorption data at room temperature revealed the existence of indirect transitions in the crystal. Moreover, the rate of change of the band gap ener...
Defining priority areas for nature conservation studies using geographic information systems a case study: Kaçkar mountains and surrounding
Tunca, Adem; Akyürek, Sevda Zuhal; Department of Geodetic and Geographical Information Technologies (2003)
Citation Formats
E. Erbarut, “Localized orbital description of electronic band structures, alloys, vacancies in semiconductors.,” Ph.D. - Doctoral Program, Middle East Technical University, 1986.