Department of Physics

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Zhang, J. (1130)
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1966 - 1979 (125)
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Journal Article (3617)
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Recent Submissions

Thermoluminescence characteristics of GaSe and Ga2Se3 single crystals
Isik, M.; SARIGÜL, NESLİHAN; Hasanlı, Nızamı (2022-06-01)
GaSe and Ga2Se3 are semiconducting compounds formed from same constituent elements. These compounds have been attractive due to their optoelectronic and photovoltaic applications. Defects take remarkable attention since th...
The spin effects on electronic, optical and mechanical properties of new ferromagnetic chalcopyrite: YMnS2
YILDIZ, BUĞRA; Erkisi, Aytac; Sürücü, Gökhan (2022-05-15)
© 2022 Elsevier B.V.In this study, magnetic and electronic nature, optical behavior, and elasticity properties of YMnS2 compound have been investigated by using density functional theory (DFT). The compound belongs to the ...
Tuning structural, electrical, and THz optical properties of VxOy films with W-doping
Atik, Bahar; Dirican, Emrah; Demirors, Oytun; Altan, Hakan; Esentürk, Okan; Yildirim, Mustafa; Akın, Tayfun (2022-05-01)
Vanadium oxide plays a crucial role as the temperature-sensitive layer of microbolometers. This layer should possess a high temperature coefficient of resistance (TCR) along with a desirable resistivity suitable for readou...
Calculation of the phase diagram of n-alkanes (CnH2n+2) by the Landau mean field theory
Yurtseven, Hasan Hamit; Kilit Dogan, E. (2022-05-01)
We study the temperature T and concentration n (number of carbon atoms) dependence on the transitions of the liquid, rotator (RI, RII,RIII,RIVand RV) and crystal phases in n-alkanes (CnH2n+2). The Landau phenomenological m...
Temperature dependent bandgap in NaBi(WO4)2 single crystals
Isik, M.; Hasanlı, Nızamı; Darvishov, N.H.; Bagiev, V.E. (2022-05-01)
© 2022 Elsevier GmbHThe double tungstates have been an attractive research interest due to their optoelectronic applications. In the present work, NaBi(WO4)2, one of the members of double tungstates family, was grown by Cz...
Investigation of seeded vertical gradient freeze (VGF) growth of CdZnTe bulk crystals
Balbaşı, Özden Başar; Ünal, Mustafa; Genç, Ayşe Merve; ÇELİK, GÜLÇİN; Parlak, Mehmet; Turan, Raşit (2022-04-15)
© 2022 Elsevier B.V.Due to the requirement for superheating above the melting point in the homogenization process of CdZnTe material, complete seed melting remains as a significant problem for the seeded vertical gradient ...
Copper-based thiospinel quantum dots as potential candidates for nonlinear optical applications
Sürücü, Gökhan (2022-04-01)
Development of new materials such as CuNiCoS4,CuCo5S8, CuCo2S4are some important candidates which have potential nonlinear optical applications in photonics such as multiphoton spectroscopy/microscopy, laser technology etc...
Thermoluminescence properties and trapping parameters of TlGaS2 single crystals
Delice, S.; Isik, M.; Hasanlı, Nızamı (2022-04-01)
TlGaS2 layered single crystals have been an attractive research interest due to their convertible characteristics into 2D structure. In the present paper, structural, optical and thermoluminescence properties of TlGaS2 sin...
Effect of temperature on band gap of PbWO4 single crystals grown by Czochralski method
Hasanlı, Nızamı (2022-04-01)
Structural and temperature-tuned band gap energy characteristics of PbMoO4 single crystals
Isik, M.; Hasanlı, Nızamı; Darvishov, N.H.; Bagiev, V.E. (2022-04-01)
© 2022 Elsevier B.V.PbMoO4 is one of the member of the molybdate materials and has been a significant research interest due to its photocatalytic and optoelectronic applications. In the present paper, the structural and op...
Calculation of the T-X phase diagram for the first-order smectic-hexatic transitions in binary mixtures
Kilit Dogan, E.; Yurtseven, Hasan Hamit (2022-04-01)
© 2022 Author(s).This work gives the T-X phase diagram calculated from the Landau mean field model for the smectic-hexatic transitions in binary mixtures, particularly, in THI-13+THI-17. It is calculated near the SmC-SmF (...
Magnetic transitions in two novel mixed-valence iron(II)–iron(III) metal formate frameworks: Two sublattice model
Yurtseven, Hasan Hamit; Tari, O. (2022-03-15)
We study the two-sublattice model in the mean field theory by expanding the Gibbs free energy in terms of the magnetizations M1 (Mup) and M2 (Mdown) with the quadratic coupling M12M22 (quadrupolar interactions) for the ord...
Determination of mechanical properties of Bi12TiO20 crystals by nanoindentation
Isik, M.; Hasanlı, Nızamı; Rustamov, F. A. (2022-03-01)
Bi12TiO20 (BTO) single crystal was grown by Czochralski method and investigated mechanically by nano-indentation measurements. X-ray diffraction pattern of the crystal presented one intensive peak around 37.95 degrees asso...
Chemical Interactions of Nano Islandic Graphene Grown on Titanium Dioxide Substrates by Chemical Vapor Deposition
Karamat, S.; Khalique, U.; Usman, Arslan; Javaid, Asad; Oral, Ahmet (2022-03-01)
In this work, direct growth of graphene is carried out on TiO2 (110) substrates by chemical vapor deposition. For few device applications, it is convenient to grow graphene directly on the dielectric substrates rather than...
Killing-Yano Cotton currents
Lindstrom, Ulf; Sarıoğlu, Bahtiyar Özgür (2022-03-01)
We discuss conserved currents constructed from the Cotton tensor and (conformal) Killing-Yano tensors (KYTs). We consider the corresponding charges generally and then exemplify with the four-dimensional Plebanski-Demianski...
Anomalous dispersion in gravity theories
Altas, Emel; Kilicarslan, Ercan; Tekin, Bayram (2022-03-01)
A wave pulse (be it a gravitational wave or a light wave) undergoes anomalous dispersion in a vacuum in flat spacetimes with an even number of spatial dimensions even if all the frequencies move at the same speed. Such an ...
Seedless, size and shape controlled synthesis of gold mesoscopic particles and their excellent SERS applications
Ahmed, Waqqar; Öztürk, İbrahim Murat; Iftikhar, Raja Muhammad Faheem; Bek, Alpan (2022-02-15)
© 2021 Elsevier B.V.Development of facile synthesis strategies for complex-shaped gold nanostructures have great significance owing to their prospective applications. Herein, we demonstrate a remarkably simple single-step ...
Hybrid design of spectral splitters and concentrators of light for solar cells using iterative search and neural networks
Yolalmaz, Alim; Yüce, Emre (2022-02-01)
The need for optically multi-functional micro- and nano-structures is growing in various fields. Designing such structures is impeded by the lack of computationally low-cost algorithms. In this study, we present a hybrid d...
Timing and spectral analysis of 2S 1417-624 during its 2018 outburst
Serim, Muhammed Miraç; Ozudogru, O. C.; Donmez, C. K.; Sahiner, S.; Serim, D.; Baykal, Altan; Inam, S. C. (2022-02-01)
We investigate timing and spectral characteristics of the transient X-ray pulsar 2S 1417-624 during its 2018 outburst with NICER follow up observations. We describe the spectra with high-energy cut-off and partial covering...
Time-resolved microscopy of femtosecond laser filaments in fused quartz
Kadan, Viktor; Blonskyi, Ivan; Pavlov, Ihor (2022-02-01)
Detailed picture of continuous shape evolution of femtosecond laser pulse has been recorded directly in the process of filament formation in fused silica using time-resolved polarization microscopy with similar to 70 fs te...
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