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Recent Submissions

Development of a selective wet-chemical etchant for precise 3D sculpting of silicon enabled by infrared non-linear laser modification Zolfaghari Borra, Mona; Radfar, Behrad; Nasser, Hisham; Çolakoğlu, Tahir; Tokel, Onur; Turnalı, Ahmet; Işık Taşgın, Dilek; Toffoli, Hande; Toffoli, Daniele; İlday, Fatih Ömer; Turan, Raşit; Pavlov, Ihor; Bek, Alpan (2024-09-01) Recently-demonstrated high-quality three-dimensional (3D) subsurface laser processing inside crystalline silicon (c-Si) wafers opens a door to a wide range of novel applications in multidisciplinary research areas. Using t...
Annealing-free, electron-selective ohmic contacts using zirconium oxide and aluminum for n-type crystalline silicon solar cells Madbouly, Loay Akmal; Nasser, Hisham; Borra, Mona Zolfaghari; Çiftpınar, Emine Hande; Altiner, Gokhan; Aliefendioglu, Atescan; Canar, Hasan Huseyin; Turan, Raşit; Ünalan, Hüsnü Emrah (2024-06-15) The challenge of Fermi-level pinning significantly complicates the establishment of Ohmic, low-resistance contacts for lightly doped n-type crystalline silicon (c-Si), a critical requirement for economically feasible devic...
The expected potential of hadronic PeVatron searches with spectral γ-ray data from the Southern Wide-field Gamma-ray Observatory Angüner, Ekrem Oğuzhan; Ergin, Tülün (2024-06-01) The presence of a spectral softening, occurring at ∼3 PeV energies, seen in the local cosmic-ray energy spectrum provides an evidence that our Galaxy hosts astrophysical objects, known as ’hadronic PeVatrons’, that are cap...
Performance analysis of CuSbSe2 thin-film solar cells with Cd-free window layers SÜRÜCÜ, GÖKHAN; Bal, Ersin; Gencer, Aysenur; Parlak, Mehmet; Surucu, Ozge (2024-05-15) This study investigates novel thin-film solar cells featuring CuSbSe2 (CASe) with ZnSnO and ZnMgO windows in the layer superstrate structure. For glass/ITO/ZnMgO/CASe/Cu + Au, the J-V measurements reveal a short-circuit cu...
Scaling symmetry, Smarr relation, and the extended first law in lower-dimensional Lovelock gravity Alkaç, Gökhan; Özen, Gökçen Deniz; Özşahin, Hikmet; Süer, Gün; Tek, Mustafa (2024-05-01) Recently, it was discovered that lower-dimensional versions of Lovelock gravity exist as scalar-tensor theories that are examples of Horndeski gravity. We study the thermodynamics of the static black hole solutions in thes...
Temperature-dependent tuning of band gap of Fe3O4 nanoparticles for optoelectronic applications Delice, S.; Isik, M.; Hasanlı, Nızamı (2024-04-01) We have investigated structural, morphological and temperature dependent absorption characteristics of Fe3O4 nanoparticles. X-ray diffraction pattern exhibited six diffraction peaks belonging to the cubic phase structure w...
A theoretical study on quasifission and fusion–fission processes in heavy-ion collisions Kayaalp, A.; Ocal, S.E.; Yaprakli, B.; Arık, Mert; Yılmaz, Osman; Umar, A.S. (2024-04-01) The stochastic mean-field (SMF) technique beyond the time-dependent-Hartree-Fock approach is used to explore the primary mass yields of quasifission fragments in the 58Fe+208Pb reaction at the bombarding energy Ec.m. = 238...
NA65(DsTau): study of tau neutrino production in p-A interactions Güler, Ali Murat (2024-03-22) The DsTau (NA65) experiment at CERN was proposed to measure an inclusive differential cross-section of Ds production in p-A interactions. As this process is a main source of tau neutrino production, its study is necessary ...
The SND@LHC experiment at CERN Güler, Ali Murat (2024-03-22) SND@LHC is proposed to exploit the high flux of energetic neutrinos of all flavours from the LHC in a hitherto unexplored pseudo-rapidity region of 7.2 < η < 8.4, complementary to all the other experiments at the LHC. The ...
Mass formulas for individual black holes in merging binaries Ozkarsligil, Zeynep Tugce; Tekin, Bayram (2024-03-01) We give formulas for individual black hole masses in a merger, by using Newtonian physics, in terms of the three measured quantities in the detector: the initial wave frequency f 1, the maximum detected frequency (chirp fr...
Revealing defect centers in PbWO4 single crystals using thermally stimulated current measurements Isik, M.; Hasanlı, Nızamı (2024-02-28) The trap centers have a significant impact on the electronic properties of lead tungstate (PbWO4), suggesting their crucial role in optoelectronic applications. In the present study, we investigated and revealed the presen...
Exciton related nonlinear optical properties of a quantum wire Ustoglu Unal, V.; Tomak, Mehmet; Zorlu, O.; Aksahin, E. (2024-02-15) A considerable amount of work is done on nonlinear optical properties in quantum wells and dots. However, relatively fewer work is done on both quantum well wires and the excitonic effects. This work analyzes the excitonic...
Nonstationary energy of perfect fluid sources in general relativity Altas, Emel; Tekin, Bayram (2024-02-15) The Arnowitt-Deser-Misner (ADM) energy for asymptotically flat spacetimes or its generalizations to asymptotically nonflat spacetimes measure the energy content of a stationary spacetime, such as a single black hole. Such ...
Characterization of linear and nonlinear optical properties of NaBi(WO4)2 crystal by spectroscopic ellipsometry Isik, M.; Guler, I.; Hasanlı, Nızamı (2024-02-01) NaBi(WO4)2 compound has been a material of considerable attention in optoelectronic applications. The present research, in which we examined the linear and nonlinear optical properties of NaBi(WO4)2 crystal using the spect...
Effect of the cathode surface temperature on the cathode fall layer parameters: experiment and simulation Simonchik, Leanid; Tomkavich, Mikalai; Islamov, Gubad; Eylenceoglu, Ender; Rafatov, İsmail (2024-02-01) Combined experimental and numerical studies reveal a significant effect of the cathode temperature on the basic parameters (such as the electric field profile, thickness of the cathode fall layer, current density, and gas ...
Kerr-Vaidya type radiating black holes in semiclassical gravity with conformal anomaly Gürses, Metin; Tekin, Bayram (2024-01-15) Static black holes in the conformal anomaly-sourced semiclassical general relativity in four dimensions were recently extended to rotating, stationary solutions. These quantum-corrected black holes show different features ...
Growth and optical properties of (Na0.5Bi0.5)(Mo1−xWx)O4 (x = 0.25) single crystal: a potential candidate for optoelectronic devices Guler, I.; Isik, M.; Hasanlı, Nızamı (2024-01-01) Double tungstates (DT) and double molybdates (DM) have significant importance because of their optoelectronic applications. Regarding the importance of DT and DM, we investigated experimentally structural and optical prope...
Thermally controlled band gap tuning in CuO nano thin films for optoelectronic applications Delice, S.; Isik, M.; Hasanlı, Nızamı (2024-01-01) Temperature dependency of band gap in CuO nano thin films has been investigated by virtue of transmission experiments at different temperatures. Structural and morphological characterization were achieved using X-ray diffr...
The study of weak decays induced by [Formula presented] transition in light-cone sum rules Alıyev, Tahmasıb; Bilmiş, Selçuk; Savcı, Mustafa (2023-12-10) In this study, we analyzed the weak decays induced by [Formula presented] transitions within the light-cone sum rules. Specifically, semileptonic decays of the bottom baryons into the P-wave baryons Λb→Λc(2625)ℓνl and Ξb→Ξ...
A new method to determine the continuous refractive index of an absorbing film by Generalized Stockwell Transform COŞKUN, EMRE; Emir, Cansu; Selamet, Semanur; Parlak, Mehmet; ÖZDER, SERHAT (2023-12-01) Generalized Stockwell Transform (GST) was adapted to analyze a transmittance signal to continuously determine the refractive index and extinction coefficient. The process is built by analyzing oscillation frequencies of th...

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