• Investigation of the anomalous behavior of the linewidth (damping constant) for the Raman Ag modes in SrSnO3 ceramic 

  Kiracı, Ali (2022)

  The anomalous behavior of the linewidth (damping constant) for the Raman Ag modes of 223 cm−1 and 260 cm−1 that contribute to the phase transition mechanism of SrSnO3 ceramic close to the phase transition temperatures of ...
• A phenomenological study on ferroelectric β-glycine 

  Kiracı, A (2021)

  The anomalous behavior of the specific heat for (Formula presented.) -glycine was analyzed in terms of the compressible Ising model approximately 5 K below and above the ferrelectric-paraelectric phase transition temperature ...
• Structural and optical properties of (TlInS2)0.75(TlInSe2)0.25 thin films deposited by thermal evaporation 

  Güler, I.; Işık, M.; Gasanly, N. (2023-01)

  Layered semiconductor materials have become a serious research topic in recent years, thanks to their effective optical properties. In this article, the thin-film structure of Tl2In2S3Se [(TlInS2)0.75(TlInSe2)0.25] material ...
• Spectroscopic ellipsometry studies of optical properties of TlIn(S0.25Se0.75)2 crystal 

  Güler, I.; Işık, M.; Gasanly, N. (2023-06)

  The optical properties of TlIn(S0.25Se0.75)2 crystals were studied by ellipsometry measurements. X-ray diffraction pattern presented well-defined peaks associated with monoclinic structure. Energy dependent graphs of various ...
• Optical characterization of (TlInS2)0.5(TlInSe2)0.5 crystal by ellipsometry: linear and optical constants for optoelectronic devices 

  Guler, İ.; Isik, M.; Gasanly, N. (2023-06)

  TlInSSe [(TlInS2)0.5(TlInSe2)0.5] crystals have garnered significant attention as promising candidates for optoelectronic applications due to their exceptional optoelectrical characteristics. This study focused on investigating ...
• Growth and temperature tuned band gap characteristics of NaBi(MoO4)2 single crystal 

  Isik, M.; Güler, İ.; Gasanly, N.M. (2023-02-01)

  Structural and optical properties of double sodium-bismuth molybdate NaBi(MoO4)2 semiconductor compound was investigated by x-ray diffraction, Raman and transmission experiments. From the x-ray diffraction experiments, the ...
• Growth and characterization of NaBi(Mo0.5W0.5O4)2 single crystal: A promising material for optoelectronic applications 

  Işık, M.; Güler, İ.; Gasanly, N.M. (2023-03-15)

  The structural and optical characteristics of NaBi(Mo0.5W0.5O4)2 single crystals grown by Czochralski method were investigated. X-ray diffraction (XRD) pattern exhibited four well-defined peaks related to tetragonal ...
• Characterization of N Rich-Silicon Nitride Thin Films Deposited by PECVD 

  Güler, İpek (2023-04-01)

  Silicon nitride thin films are very important for their possible use in semiconductor industry and electronic applications. Changing the deposition parameters, silicon nitrides which have many varying optical properties ...
• The Important Role of N(2)(CH3)(4) Ion in the Phase-Transition Mechanism of [N(CH3)(4)](2)ZnBr4 

  Kiracı, Ali (2020-05)

  The chemical shift of the N(2)(CH3)(4) ion, which has been found to exhibit the similar anomalous behavior of the monoclinic angle $\Delta \beta $ , was related to the order parameter to evaluate the temperature dependence ...
• Temperature-dependent absorption edge and photoconductivity of Tl 2In2S3Se layered single crystals 

  Güler, İpek; Ambrico, M.; Ligonzo, T.; Gasanly, N.M. (2013-02-15)

  Temperature variation of indirect band gap of Tl2In 2S3Se layered single crystals were obtained by means of absorption and photoconductivity measurements. The temperature coefficient of -7.1 × 10-4 eV/K from absorption ...
• Phenomenological Study of Manganese Antimonite Close to the Néel Temperature 

  Kiracı, Ali (2021)

  The anomalous behavior of the frequency $f$ and specific heat ${C_p}$ data for the new layered trigonal ($P\bar{3}1m$) form of manganese antimonite (MnSb2O6) was analyzed by means of the power-law relations with the critical ...
• Phenomenological approaches on the Nd3+ doped ferroelectric LaBGeO5 

  Kara, N.; Kiracı, Ali; Yurtseven, Hamit (2021)

  Two phenomenological models, namely the compressible Ising model and Landau model, have been used to analyze the specific heat and the dielectric constant data, respectively for the pure and Nd3+ doped LaBGeO5 (LBG) crystals. ...
• Parallel data reduction techniques for big datasets 

  Yıldırım, Ahmet Artu; Özdoğan, Cem; Watson, Dan (2013-10-31)

  Data reduction is perhaps the most critical component in retrieving information from big data (i.e., petascale-sized data) in many data-mining processes. The central issue of these data reduction techniques is to save time ...
• Optical analysis of TlInS2xSe2(1-x) mixed crystals 

  Güler, İpek (2014-01-21)

  The ellipsometry measurements were carried out on TlInS2xSe2(1-x) mixed crystals in the spectral range of 1.5-6.0 eV at room temperature. The refractive index, extinction coefficient, real and imaginary parts of dielectric ...
• Analysis of the specific heat and the free energy of [N(CH3)(4)](2)ZnBr4 close to the ferro-paraelastic phase transition 

  Kiracı, Ali (2019-03-04)

  A power-law formula deduced from the Ising model was used to analyze the temperature dependence of the specific heat and the Gibbs free energy of [N(CH3)(4)](2)ZnBr4 compound in the vicinity of the phase transition temperature ...
• Analysis of the specific heat and the free energy and calculation of the entropy and the internal energy of [N(CH3)(4)](2)MnBr4 close to the phase transition 

  Kiracı, Ali (2021-10-26)

  The critical behavior of the specific heat and the Gibbs free energy of [N(CH3)(4)](2)MnBr4 was analyzed using the 'sing model close to the phase transition temperature of T-c = 276.5 K. Obtained value of alpha=0.02 from ...
• A phenomenological study on ferroelastic KH3(SeO3)(2) and KD3(SeO3)(2) 

  Kiracı, Ali (2021-11)

  The anomalous behavior of the Brillouin frequency shift omega of the soft acoustic mode for KH3(SeO3)(2) and KD3(SeO3)(2), and also the volume thermal expansion proportional to(V) and the specific heat C of KH3(SeO3)(2) ...
• Order-disorder transition in the ferroelectric LiTaO3 

  Kiracı, Ali; Yurtseven, Hamit (2019-10-26)

  The temperature dependences of the damping constant and the relaxation time are calculated by using the Raman frequencies of a* and the lowest A(1) (TO) phonons in the ferroelectric phase close to the ferroelectric-paraelectric ...
• Damping constant and the inverse relaxation time calculated as a function of pressure using the X-ray diffraction data close to the cubic-tetragonal phase transition in SrTiO3 

  Yurtseven, H.; Kiracı, Ali (2019-10-26)

  The damping constant is calculated as a function of pressure at room temperature using the normalized intensity as an order parameter near the cubic-tetragonal phase transition in SrTiO3. The observed X-ray diffraction ...
• Thermoluminescence characterization of (Ga2Se3)(0.25) - (Ga2S3)(0.75) single crystal compounds 

  Işık, M.; Güler, İpek; Gasanly, N. M. (2020-03-15)

  Ga2Se3 and Ga2S3 compounds take attention due to their potential applications in photovoltaics. Defects and impurities may affect the quality of optoelectronic devices. Therefore, it is worthwhile to determine the parameters ...

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