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Recent Submissions

Defect assisted nonlinear absorption and optical limiting in amorphous TlGaS2(1-x)Se2(x) (0 <= x <= 1) thin films ÜNLÜ, BEKİR ASİLCAN; KARATAY, AHMET; Yildiz, Elif Akhuseyin; Dincbay, Turkan; ÜNVER, HÜSEYİN; Hasanlı, Nızamı; ELMALI, Ayhan (2022-01-01) In an attempt to investigate the effect of band gap energy and defect states on nonlinear absorption, 80 nm thick amorphous TlGaS2(1-x)Se2(x) thin films with different compositions (0 <= x <= 1) were deposited by vacuum ev...
Magnetic, thermal and ferroelectric properties of MOFs (MHyM, M = Fe, Mn) close to phase transitions Yurtseven, Hasan Hamit; Kilit Dogan, E. (2021-12-15) © 2021 Elsevier B.V.Magnetic, thermal and ferroelectric properties of MOFs (metal organic frameworks), in particular, the compounds CH3NH2NH2M(HCOO)3 (MHyM) with M = Fe and Mn, are studied close to phase transitions. For t...
Shape and deposition angle control of silver film-over-nanosphere SERS substrates Seyedpour Esmaeilzad, Nasim; Demirtas, Ozge; Demir, Ahmet Kemal; Bek, Alpan (2021-12-01) Thin metallic films on dielectric nanospheres are demonstrated to have a high potential for the fabrication of cost-effective SERS substrates. In addition to the morphological advantages that nanospheres offer for attainin...
Hybrid transparent conductive electrode structure for solar cell application Altuntepe, Ali; Olgar, Mehmet Ali; Erkan, Serkan; Hasret, Onur; Kececi, Ahmet Emin; Kokbudak, Gamze; TOMAKİN, MURAT; Seyhan, Ayse; Turan, Raşit; Zan, Recep (2021-12-01) This study draws on our experiences with graphene to perform a hybrid TCO structure composed of AZO and graphene. We first set out to enhance the electrical and optical properties of AZO to enable its use especially in the...
Self-metallation of a free-base porphyrin on a metal oxide surface mediated by extended defects: insight from emph{ab initio} molecular dynamics simulations Malcıoğlu, Osman Barış; Bockstedte, Michel (2021-12-01)
Pressure and spin effect on the stability, electronic and mechanic properties of three equiatomic quaternary Heusler (FeVHfZ, Z = Al, Si, and Ge) compounds Sürücü, Gökhan; Gencer, A.; Surucu, O.; Usanmaz, D.; Candan, A. (2021-12-01) © 2021 Elsevier LtdIn this paper, three equiatomic quaternary Heusler compounds − FeVHfZ (Z = Al, Si, and Ge) − are investigated for their structural, magnetic, electronic, mechanic, and lattice dynamic properties under pr...
Equiatomic quaternary Heusler compounds TiVFeZ (Z=Al, Si, Ge): Half-metallic ferromagnetic materials Gencer, A.; Surucu, O.; Usanmaz, D.; Khenata, R.; Candan, A.; Sürücü, Gökhan (2021-11-25) © 2021 Elsevier B.V.Equiatomic quaternary Heusler compounds (EQHCs) are very promising materials for spintronic applications due to their excellent electronic and magnetic properties. In this study, structural, electronic,...
Characterization of Cu-rich and Zn-poor Cu2ZnSnS4 single crystal grown by vertical Bridgman technique Peksu, Elif; Terlemezoglu, Makbule; PARLAK, MEHMET; Karaağaç, Hakan (2021-11-15) © 2021 Elsevier B.V.To date, although a number of studies have focused on understanding the fundamental properties of Cu-poor/Zn-rich Cu2ZnSnS4 (CZTS) single crystals, little attention has been paid to investigate the phys...
Experimental and theoretical investigation of the mechanical characteristics of sillenite compound: Bi12GeO20 Sürücü, Gökhan; Işık, Mehmet; Gencer, Ayşenur; Hasanlı, Nızamı (2021-11-01)
Effect of thallium (Tl) substitution for indium (In) on ellipsometric characteristics of TlInSe2 single crystals Isik, M.; Hasanlı, Nızamı (2021-11-01) © 2021 Elsevier LtdTlMeSe2 (Me: Tl, In) semiconducting compounds exhibiting chain structure have been attractive ternary materials in various technological devices. In the TlMeSe2 structure, Tl1+ is monovalent while Me3+ i...
New currents with Killing-Yano tensors Lindstrom, Ulf; Sarıoğlu, Bahtiyar Özgür (2021-10-01) New relations involving the Riemann, Ricci and Einstein tensors that have to hold for a given geometry to admit Killing-Yano tensors (KYTs) are described. These relations are then used to introduce novel conserved 'current...
The effects of charmonium on the properties of the 1++ hidden charm poles in effective field theory Cincioglu, E.; Özpineci, Altuğ; Yildirim Yilmaz, D. (2021-10-01) © 2021 Elsevier B.V.In this study, the properties of the JPC=1++ hidden charm poles are analyzed under the variation of the bare 2P charmonium mass within the effective field theory proposed in Ref. [1]. The main focus of ...
Strong and electromagnetic decays of the radially excited D-s and B-s mesons in light cone QCD sum rules Bilmiş, Selçuk (2021-10-01) Recently, LHCb Collaboration announced the discovery of radial excitations of D-s and B-s mesons. In present work, we calculate the most promising strong and electromagnetic decay widths of radially excited D-s (2S) and B-...
Calculation of the Liquid-Solid Phase Diagram and the Thermodynamic Quantities of the Binary System of Tetradecane and Hexadecane Using the Mean Field Theory Yurtseven, Hasan Hamit; Emirosmanoglu, T.; Tari, O. (2021-10-01) The T - x phase diagram of a binary system of tetradecane + hexadecane is calculated using the Landau phenomenological model. Expressions derived for the phase lines are fitted to experimental data from the literature and ...
Spreading resistance modeling for rapid extraction of contact resistivity with a four-point probe Turkay, Deniz; Tsoi, Konstantin; Donercark, Ergi; Turan, Raşit; Yerci, Selçuk (2021-09-15) Extraction of contact resistivity (ρc) with the four-point probe (4PP) method requires considerably fewer fabrication and measurement steps compared to conventional alternatives (e.g. the transfer length method, TLM). Yet,...
Chaos in the SU (2) Yang-Mills Chern-Simons matrix model Başkan, Kağan; Kürkcüoğlu, Seçkin (2021-09-15) We study the effects of addition of the Chern-Simons (CS) term in the minimal Yang-Mills (YM) matrix model composed of two 2×2 matrices with SU(2) gauge and SO(2) global symmetry. We obtain the Hamiltonian of this system i...
On the calculation of covariant expressions for Dirac bilinears Olpak, M. A.; Özpineci, Altuğ (2021-09-01) In this article, various approaches to calculate covariant expressions for the bilinears of Dirac spinors are presented. For this purpose, algebraic equations defining Dirac spinors are discussed. Following that, a covaria...
The effect of Zn concentration on the structural and optical properties of Cd1-xZnxS nanostructured thin films Isik, M.; Terlemezoglu, M.; Isik, S.; Erturk, K.; Hasanlı, Nızamı (2021-09-01) The structural and optical properties of electrodeposited Cd1-xZnxS nanostructured thin films were investigated in the present paper for compositions of x = 0, 0.03, 0.06 and 0.09. X-ray diffraction patterns of the deposit...
Semileptonic baryon decays in the light cone QCD sum rules ALIYEV, TAHMASIB; BİLMİŞ, SELÇUK; SAVCI, MUSTAFA (2021-09-01) © 2021 Published by the American Physical SocietyForm factors of the weak transitions are calculated within the light cone QCD sum rules. The pollution coming from the contribution of the negative parity baryon is eliminat...
Illumination and voltage effects on the forward and reverse bias current-voltage (I-V) characteristics in In/In2S3/p-Si photodiodes Yukselturk, Esra; Surucu, Ozge; Terlemezoglu, Makbule; Parlak, Mehmet; ALTINDAL, ŞEMSETTİN (2021-08-18) The illumination and voltage effects on the I-V measurements of the fabricated In/In2S3/p-Si photodiode were investigated in dark and under various illumination intensities (20-100 mW/cm(2)) between +/- 2 V. Two linear reg...

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