Kerim R Allakhverdiev

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The formation of non-uniform spatial structures in irradiated solids (metals, semiconductors) is investigated, when the subsystem of nonequilibrium lattice defects (vacancies and interstitials) forms bonded states, nanoclusters. A set of kinetic equations is formulated which incorporates, (i) generation of point defects by radiation, (ii) their diffusion(More)
Ș. Ellialtıoğlu,1,* E. Mete,1,† R. Shaltaf,1 K. Allakhverdiev,2,3 F. Gashimzade,2 M. Nizametdinova,4 and G. Orudzhev4 1Department of Physics, Middle East Technical University, Ankara 06531, Turkey 2Institute of Physics, Azerbaijan National Academy of Sciences, Baku 370073, Azerbaijan 3Materials Institute, Marmara Research Center, TÜBİTAK, Gebze/Kocaeli,(More)
We report the results of investigating a low-voltage, polarization-insensitive, reflective-type modulator based on an epsilon-GaSe crystal and operated at the 1.960-eV line of a He-Ne laser. We demonstrate that the modulation in an Al-epsilon-GaSe-Cu device results mainly from the Franz-Keldysh effect. Relatively high speed and low operating voltage could(More)
The Bridgman method is used to grow especially undoped and doped single crystals of GaSe. Composition and impurity content of the grown crystals were determined using X-ray fluorescence (XRF) method. X-ray diffraction, Raman scattering, photoluminescence (PL), and IR transmission measurements were performed at room temperature. The long wavelength lattice(More)
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