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Recent Submissions

VO2-Based Dynamic Coding Metamaterials for Terahertz Wavefront Engineering Akyurek, Bora; Noori, Aileen; Demirhan, Yasemin; Ozyuzer, Lutfi; Guven, Kaan; Altan, Hakan; Aygun, Gulnur (2025-01-01) Digital coding metasurfaces (DCMS) offer a promising alternative to conventional metasurface designs for achieving common functionalities by controlling the phase of reflected or transmitted electromagnetic waves. Their si...
Nanoindentation study of PbMoO4 crystals: mechanical properties and implications for applications Isik, M.; Hasanlı, Nızamı (2025-01-01) Nanomechanical properties of lead molybdate ( PbMoO 4 ) single crystal were investigated using nanoindentation measurements. The force-dependent Young's modulus and hardness of PbMoO4 along the [ 100 ] direction was determ...
A search for Planet Nine with small spacecraft: Three-body, post-Newtonian, non-gravitational, planetary and Kuiper Belt effects Koprucu, Sahin Ulas; Tekin, Bayram (2024-12-01) A hypothetical gravitating body in the outer Solar System, the so-called Planet Nine, was proposed to explain the unexpected clustering of the Kuiper Belt Objects. As it has not been observed via telescopes, it was conject...
Interfacial modification by 2-fluoroisonicotinic acid enabling high-efficiency and stable n-i-p perovskite solar cells Sun, Lei; Zhang, Chu; Bektaş, Gence; Li, Xiaowei; Ma, Chunying; Ma, Tingli (2024-12-01) The power conversion efficiency (PCE) of organic-inorganic halide perovskite solar cells (PSCs) developed rapidly in recent years. However, the defects at the bulk grain boundaries and heterojunction interfaces acting as n...
Unveiling the application potential of PbMo0.75W0.25O4 crystal: Linear and nonlinear optical properties through ellipsometry Isik, M.; Hasanlı, Nızamı (2024-12-01) PbMo0.75W0.25O4 compound is formed by replacing one quarter of the Mo atoms in the PbMoO4 with W atoms and has significant potential for optoelectronic applications. Optical properties of PbMo0.75W0.25O4 single crystal hav...
Integrating theoretical and experimental approaches to unveil the mechanical properties of CuSbSe2 thin films Surucu, Ozge; Gencer, Aysenur; Usanmaz, Demet; Parlak, Mehmet; SÜRÜCÜ, GÖKHAN (2024-12-01) An exhaustive investigation of the mechanical characteristics of CuSbSe2 thin films is conducted in this study by combining experimental nanoindentation methods with theoretical simulations. The Ab-initio Molecular Dynamic...
Anomaly induced inflation in the minimal quartic extension of Einstein’s gravity Demirel, Kerim; Tekin, Bayram (2024-12-01) A particular extension of Einstein’s General Relativity up to and including quartic terms in the curvature tensor is minimal in the sense that it has a unique maximally symmetric vacuum and only a massless spin-2 excitatio...
Laser-Induced Damage of UHMW-PE-Based Layered Ballistic Materials Candan, Can; Kaya Çekin, Emine Yasemen; Akşit Kaya, Elif Türkan; Tiken, Mehmet; Bek, Alpan; Berberoğlu, Halil; ORHAN, ELİF; Yeniay, Aydın (2024-11-19) The laser-induced damage threshold properties of material structures play a key role in identifying and selecting optimum materials with the respective geometric configurations for laser shielding applications. The laser-i...
Chern-Simons-like formulation of exotic massive 3D gravity models Dedeoğlu, Büşra; Özkan, Mehmet; Sarıoğlu, Bahtiyar Özgür (2024-11-01) We investigate the Chern-Simons-like formulation of exotic general massive gravity models within the framework of third-way to three-dimensional gravity. We classify our construction into two main approaches: one using tor...
Single-beam low-frequency loss modulation technique for two-photon absorption measurement Kadan, Viktor; Pavlov, Ihor; Dmytruk, Andriy; Blonskyi, Ivan; Pavlova, Tetiana; Serozhkin, Yuriy; Goodarzi, Arian; Bondar, Mykhailo (2024-10-15) We present a straightforward and reliable single-beam configuration designed for the assessment of two-photon absorption (2PA) through the utilization of the loss modulation technique. Mechanical rotation of a half-wave pl...
Exploring Temperature-Dependent bandgap and Urbach energies in CdTe thin films for optoelectronic applications Surucu, O.; SÜRÜCÜ, GÖKHAN; Hasanlı, Nızamı; Parlak, Mehmet; Isik, M. (2024-10-15) This study examines CdTe thin films deposited via RF magnetron sputtering, focusing on structural and optical properties. X-ray diffraction, Raman spectroscopy, and SEM assessed structural characteristics. Optical properti...
Constraints and time evolution in generic f(Riemann) gravity Altas, Emel; Tekin, Bayram (2024-10-11) We give a detailed canonical analysis of the n-dimensional f(Riemann) gravity, correcting the earlier results in the literature. We also write the field equations in the Fischer-Marsden form which is amenable to identifyin...
A quantal diffusion approach for multinucleon transfer in heavy-ion collisions Kayaalp, A.; Arık, Mert; Ocal, S.E.; Yılmaz, Osman; Umar, A.S. (2024-10-01) The stochastic mean-field (SMF) approach beyond the time-dependent-Hartree-Fock theory is used to explore the primary production cross sections in Ni64+130Te at the bombarding energy Ec.m.=184.3 MeV and Pb206+118Sn at Ec.m...
Spectroscopic ellipsometry study of linear and nonlinear optical properties of NaBi(Mo0.5W0.5O4)2 crystal Isik, M.; Guler, I.; Hasanlı, Nızamı; Darvishov, N.H. (2024-10-01) In this study, linear and nonlinear optical characteristics of NaBi(Mo0.5W0.5O4)2 crystal, a new material that may have potential for optoelectronic applications, were investigated. NaBi(Mo0.5W0.5O4)2 single crystals were ...
Pulse frequency variations and timing noise of MXB 0656-072 during the 2007-2008 type I outbursts and implications for its magnetic field Serim, M. M.; Serim, D.; Dönmez, Çağatay Kerem; Tuo, Y.; Ducci, L.; Baykal, Altan; Santangelo, A. (2024-10-01) Aims. We aim to explore the properties of the Be/X-ray binary system MXB 0656–072 from a timing analysis perspective through an investigation of the RXTE/PCA and Fermi/GBM data during its 2007–2008 type I outbursts.Met...
Characterization of Bi12SiO20 single crystal: understanding structural and thermal properties ALTUNTAŞ, GÖZDE; Isik, M.; Hasanlı, Nızamı (2024-10-01) This study presents a thorough examination of the structural and thermal characteristics of Bi12SiO20 crystal. X-ray diffraction (XRD) analysis was employed to investigate the crystallographic structure, while scanning ele...
A statistical analysis of atmospheric parameters for cataloged astronomical observatory sites Kurt, Zühal; Yerli, Sinan Kaan; AKSAKER, NAZIM; AKTAY, ALİŞAN; ERDOĞAN, MEHMET AKİF (2024-10-01) Astronomical sites have to be selected according to many factors whereas the geographic location of the site and the quality of the atmosphere above the site play an important role in the decision process. The following fa...
Astronomical site selection for Antarctica with astro-meteorological parameters Aksaker, Nazim; Bayazit, M.; Kurt, Z.; Yerli, Sinan Kaan; Aktay, Alişan; Erdoğan, Mehmet Akif (2024-10-01) The primary objective of this study is to employ Multi-Criteria Decision Analysis (MCDA) and Geographical Information System (GIS) techniques to identify and assess potential sites for astronomical observations in Antarcti...
Identification of shallow trap centers in InSe single crystals and investigation of their distribution: A thermally stimulated current spectroscopy Isik, M.; Hasanlı, Nızamı (2024-10-01) Identification of trap centers in semiconductors takes great importance for improving the performance of electronic and optoelectronic devices. In the present study, we employed the thermally stimulated current (TSC) metho...
Rotating AdS3× S3 and dyonic strings from 3-dimensions Deger, Nihat Sadik; Deral, Ceren Ayse; Saha, Aritra; Sarıoğlu, Bahtiyar Özgür (2024-10-01) We make a general Killing spinor analysis of a particular D = 3, N = 4 gauged supergravity that comes from a consistent S3 reduction of D = 6, N = (1, 0) supergravity coupled to a single chiral tensor multiplet. We then fo...

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