Browsing Physics / Fizik by Department "Izmir Institute of Technology. Photonics"
Now showing items 1-20 of 21
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Adsorption and diffusion characteristics of lithium on hydrogenated α- and β-silicene
(Beilstein-Institut Zur Forderung der Chemischen Wissenschaften, 2017-08)Using first-principles density functional theory calculations, we investigate adsorption properties and the diffusion mechanism of a Li atom on hydrogenated single-layer α- and β-silicene on a Ag(111) surface. It is found ... -
Angle resolved vibrational properties of anisotropic transition metal trichalcogenide nanosheets
(Royal Society of Chemistry, 2017-03)Layered transition metal trichalcogenides (TMTCs) are a new class of anisotropic two-dimensional materials that exhibit quasi-1D behavior. This property stems from their unique highly anisotropic crystal structure where ... -
Atomic-scale understanding of dichlorobenzene-assisted poly 3-hexylthiophene-2,5-diyl nanowire formation mechanism
(Elsevier, 2017-04)Low-dimensional Poly 3-hexylthiophene-2,5-diyl (P3HT) structures that serve efficient exciton dissociation in organic solar cells, play a major role in increasing the charge collection, and hence, the efficiency of organic ... -
Experimental and computational investigation of graphene/SAMs/n-Si Schottky diodes
(Elsevier, 2018-01)We have investigated the effect of two different self-assembled monolayers (SAMs) on electrical characteristics of bilayer graphene (BLG)/n-Si Schottky diodes. Novel 4″bis(diphenylamino)-1, 1′:3″-terphenyl-5′ carboxylic ... -
Few-layer MoS2 as nitrogen protective barrier
(IOP Publishing, 2017-09)We report experimental and theoretical investigations of the observed barrier behavior of few-layer MoS2 against nitrogenation. Owing to its low-strength shearing, low friction coefficient, and high lubricity, MoS2 exhibits ... -
h-AlN-Mg(OH)2 van der Waals bilayer heterostructure: Tuning the excitonic characteristics
(American Physical Society, 2017-02)Motivated by recent studies that reported the successful synthesis of monolayer Mg(OH)2 [Suslu, Sci. Rep. 6, 20525 (2016)2045-232210.1038/srep20525] and hexagonal (h-)AlN [Tsipas, Appl. Phys. Lett. 103, 251605 (2013)APPL ... -
Hydrogen-induced sp2-sp3 rehybridization in epitaxial silicene
(American Physical Society, 2017-12)We report on the hydrogenation of (3×3)/(4×4) silicene epitaxially grown on Ag(111) studied by in situ Raman spectroscopy and state-of-the-art ab initio calculations. Our results demonstrate that hydrogenation of (3×3)/(4×4) ... -
Hydrogen-induced structural transition in single layer ReS2
(IOP Publishing, 2017-09)By performing density functional theory-based calculations, we investigate how structural, electronic and mechanical properties of single layer ReS2 can be tuned upon hydrogenation of its surfaces. It is found that a stable, ... -
Hydrogenation-driven phase transition in single-layer TiSe2
(IOP Publishing, 2017-11)First-principles calculations based on density-functional theory are used to investigate the effects of hydrogenation on the structural, vibrational, thermal and electronic properties of the charge density wave (CDW) phase ... -
Mechanical properties of monolayer GaS and GaSe crystals
(American Physical Society, 2016-12)The mechanical properties of monolayer GaS and GaSe crystals are investigated in terms of their elastic constants: in-plane stiffness (C), Poisson ratio (ν), and ultimate strength (σU) by means of first-principles calculations. ... -
Monitoring the doping and diffusion characteristics of Mn dopants in cesium lead halide perovskites
(American Chemical Society, 2018-05)Cesium lead perovskites, in the form of CsPbX3 or Cs4PbX6, have been widely used for various optoelectronic applications due to their exceptionally good optical properties. In this study, the effect of Mn doping on the ... -
P3HT-graphene bilayer electrode for Schottky junction photodetectors
(IOP Publishing, 2018-02)We have investigated the effect of a poly (3-hexylthiophene-2.5-diyl)(P3HT)-graphene bilayer electrode on the photoresponsivity characteristics of Si-based Schottky photodetectors. P3HT, which is known to be an electron ... -
Stability, electronic and phononic properties of β and 1T structures of SiTex (x = 1, 2) and their vertical heterostructures
(IOP Publishing, 2017-08)By performing first-principles calculations, we predict a novel, stable single layer phase of silicon ditelluride, 1T-SiTe2, and its possible vertical heterostructures with single layer β-SiTe. Structural optimization and ... -
Stable monolayer α-phase of CdTe: Strain-dependent properties
(Royal Society of Chemistry, 2017)CdTe is a well known and widely used binary compound for optoelectronic applications. In this study, we propose the thinnest, free standing monolayer of CdTe which has a tetragonal-PbO (α-PbO) symmetry. The structural, ... -
Stable ultra-thin CdTe crystal: A robust direct gap semiconductor
(IOP Publishing, 2017-11)Employing density functional theory based calculations, we investigate structural, vibrational and strain-dependent electronic properties of an ultra-thin CdTe crystal structure that can be derived from its bulk counterpart. ... -
Strain mapping in single-layer two-dimensional crystals via Raman activity
(American Physical Society, 2018-03)By performing density functional theory-based ab initio calculations, Raman-active phonon modes of single-layer two-dimensional (2D) materials and the effect of in-plane biaxial strain on the peak frequencies and corresponding ... -
Structural, electronic and phononic properties of PtSe2: From monolayer to bulk
(Institute of Physics Publishing, 2018-06)The layer dependent structural, electronic and vibrational properties of the 1T phase of two dimensional (2D) platinum diselenide are investigated by means of state-of-the-art first-principles calculations. The main findings ... -
Thinning CsPb2Br5 perovskite down to monolayers: Cs-dependent stability
(American Physical Society, 2017-10)Using first-principles density functional theory calculations, we systematically investigate the structural, electronic, and vibrational properties of bulk and potential single-layer structures of perovskitelike CsPb2Br5 ... -
Tuning electronic and magnetic properties of monolayer α-RuCl3 by in-plane strain
(Royal Society of Chemistry, 2018)By employing density functional theory-based methods, the structural, vibrational, electronic, and magnetic properties of monolayer α-RuCl3 were investigated. It was demonstrated that ferromagnetic (FM) and zigzag-antife ... -
Ultra-thin ZnSe: Anisotropic and flexible crystal structure
(Elsevier, 2017-07)By performing density functional theory-based calculations, we investigate the structural, electronic, and mechanical properties of the thinnest ever ZnSe crystal [11]. The vibrational spectrum analysis reveals that the ...
