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Wyszukujesz frazę "66.30.J-" wg kryterium: Temat

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    Wyświetlanie 1-11 z 11
    Tytuł:
    Modeling of Thermal Processing at the Formation of Shallow Doped IC Active Regions
    Autorzy:
    Komarov, A.
    Velichko, O.
    Zayats, G.
    Komarov, F.
    Miskiewicz, S.
    Mironov, A.
    Makarevich, Yu.
    Powiązania:
    https://bibliotekanauki.pl/articles/1400426.pdf
    Data publikacji:
    2013-05
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    66.30.J-
    07.05.Tp
    07.05.Bx
    Opis:
    Physical and mathematical models as well as numerical algorithms for simulation of advanced technological processes, such as thermal annealing after low-energy ion implantation used during the VLSI fabrication are presented. In this paper we propose a model that treats the migration of the impurity atoms at the thermal annealing. We take into account process nonlinearity and influence of non-uniform defects distribution as well as electric field and elastic stress on the migration of atoms. The redistribution of point defects as well as the diffusion of nonequilibrium impurity interstitials in silicon are described by time-dependent quasi-linear parabolic equations. The results of numerical calculations are presented as well.
    Źródło:
    Acta Physica Polonica A; 2013, 123, 5; 804-808
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Ab Initio Study of He Migrations in Fcc Au-Ag Alloys
    Autorzy:
    Zhu, Z.
    Zhang, Y.
    Xie, J.
    Yang, L.
    Nie, J.
    Zu, X.
    Powiązania:
    https://bibliotekanauki.pl/articles/1398923.pdf
    Data publikacji:
    2016-06
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    66.30.J-
    81.05.Bx
    71.15.Mb
    Opis:
    Ab initio calculations based on the density functional theory have been performed to investigate the migrations of interstitial helium (He) atoms in Au-Ag alloys with two different mass ratios (Au₃Ag₂ and AuAg). The results show that the migration mechanisms of He atoms mainly depend on the crystal structures of alloys, and their migration energy barriers are affected by the migration paths in Au-Ag alloys. He interstitials preferentially occupied the most stable sites, but it is difficult for He interstitials to migrate to nearest most stable sites via second stable positions at room temperature. When He atom is at the tetrahedral position which has higher formation energy, it possibly migrates to nearest tetrahedral positions directly for AuAg alloy. In addition, comparing the migration of He defects in the two alloys, we found that the properties of migration energy and relative stability of He atoms probably slightly depend on the mass-density of Au-Ag alloys.
    Źródło:
    Acta Physica Polonica A; 2016, 129, 6; 1151-1154
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Optical Study of MBE Grown Undoped Si-Si$\text{}_{1-x}$Ge$\text{}_{x}$/Si Superlattices
    Autorzy:
    Gnezdilov, V. P.
    Mironov, M.
    Yshakov, V.
    Mironov, O. A.
    Phillips, P. J.
    Parker, E. H. C.
    Powiązania:
    https://bibliotekanauki.pl/articles/1952678.pdf
    Data publikacji:
    1996-11
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    78.30.-j
    78.66.-w
    78.66.Db
    Opis:
    Raman spectroscopy and spectroscopic ellipsometry have been used to characterize Si/Si$\text{}_{0.78}$Ge$\text{}_{0.22}$ superlattices grown by molecular beam epitaxy on (001)Si at different substrate temperatures. The results are interpreted to give information on material and interface quality, layer thicknesses, and state of strain. The observed frequencies of zone-folded longitudinal acoustic phonons in a high quality sample agree well with those calculated using Rytov's theory of acoustic vibrations in layered media.
    Źródło:
    Acta Physica Polonica A; 1996, 90, 5; 1045-1049
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Metastability of Band-Gap Energy in GaInNAs Compound Investigated by Photoreflectance
    Autorzy:
    Kudrawiec, R.
    Misiewicz, J.
    Pavelescu, E.-M.
    Konttinen, J.
    Pessa, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/2038258.pdf
    Data publikacji:
    2004-08
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    73.22.-f
    78.66.-w
    78.30.-j
    Opis:
    The band-gap energy of GaInNAs layers lattice-matched to GaAs substrate and annealed under different temperatures is investigated by photoreflectance spectroscopy. Different nitrogen nearest-neighbor environments of N atom appear in GaInNAs layers due to the post-growth annealing. It leads to an energy-fine structure of the band gap, i.e. well separated photoreflectance resonances related to different nitrogen nearest-neighbor environments (N-Ga$\text{}_{4-m}$In$\text{}_{m}$ (0≤ m≤ 4) short-range-order clusters). The temperature dependence of the band gap E(T) related to different N-Ga$\text{}_{4-m}$In$\text{}_{m}$ clusters is investigated in 10-280 K temperature range, and Varshni and Bose-Einstein parameters for E(T) are determined.
    Źródło:
    Acta Physica Polonica A; 2004, 106, 2; 249-263
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Electron Beam Induced Modification of Polymer-Like Carbon Coatings
    Autorzy:
    Plaipaitė-Nalivaiko, R.
    Adlienė, D.
    Adlys, G.
    Powiązania:
    https://bibliotekanauki.pl/articles/1400455.pdf
    Data publikacji:
    2013-05
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    78.70.-g
    78.66.-w
    78.30.-j
    Opis:
    Carbon coatings can possess diamond-like, polymer-like, graphite-like or other properties depending on deposition methods and technological parameters. Structural changes in the polymer-like carbon coatings irradiated by high energy electrons are discussed in the present paper. The polymer-like carbon coatings have been synthesized from $C_2H_2$ gas in the radio frequency dual-plasma reactor using various deposition parameters. Plasma enhancement chemical vapor deposition deposited experimental polymer-like carbon samples were irradiated with high energy electrons in the medical linear accelerator. The investigations of carbon coatings have been carried out using the Fourier-transform infrared, Raman and UV-VIS spectroscopies. Modification of the polymer-like carbon coatings is discussed in relation with radiation induced formation of free radicals and unsaturated bonds along with possible cross-linking processes.
    Źródło:
    Acta Physica Polonica A; 2013, 123, 5; 871-873
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Structure and Vibrational Spectra of 1,3,5-Trimethoxybenzene
    Autorzy:
    Pawlukojć, A.
    Bator, G.
    Sobczyk, L.
    Powiązania:
    https://bibliotekanauki.pl/articles/1813991.pdf
    Data publikacji:
    2007-12
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    78.30.-j
    78.70.Nx
    61.66.Hq
    Opis:
    Inelastic neutron scattering infrared and Raman spectra of the crystalline 1,3,5-trimethoxybenzene were measured and compared with simulated ones by using the Gaussian 98 and DMol3 programs at density functional theory methods. Application of the double numerical plus polarization basis set for the crystalline state within the local density Perdew and Wang (PWC functionals) approximation quite well reproduces the low frequency bands related to the methyl group librational modes, which are very sensitive to molecular interactions. Infrared spectra for the crystalline sample and $CCl_4$ solution show spectacularly the change of low frequency modes by going from the symmetric $D_{3h}$ molecules in the gas phase to asymmetric ones in the crystal.
    Źródło:
    Acta Physica Polonica A; 2007, 112, S; S-171-S-181
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Frequency Domain Optical Coherence Tomography Techniques in Eye Imaging
    Autorzy:
    Wojtkowski, M.
    Kowalczyk, A.
    Targowski, P.
    Gorczyńska, I.
    Powiązania:
    https://bibliotekanauki.pl/articles/2035626.pdf
    Data publikacji:
    2002-12
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    42.30.Wb
    42.66.Ew
    42.66.-p
    07.60.-j
    07.60.Ly
    Opis:
    This contribution presents an application of frequency-domain optical tomography to ophthalmology. Essential theoretical foundations of time-domain and frequency-domain optical tomography are presented. Images of sections through the anterior chamber, the corneo-scleral angle and fundus of the eye are reconstructed from the spectral fringes. The morphological information gained by tomograms is important for diagnosing and planning of a treatment of glaucoma.
    Źródło:
    Acta Physica Polonica A; 2002, 102, 6; 739-746
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Relative Reflection Difference as a Method for Measuring the Thickness of the Exfoliated MoSe₂ Layers
    Autorzy:
    Łempicka, K.
    Norowski, K.
    Grzeszczyk, M.
    Król, M.
    Lekenta, K.
    Babiński, A.
    Piętka, B.
    Szczytko, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/1033778.pdf
    Data publikacji:
    2017-08
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    63.20.dd
    78.20.Ci
    78.30.-j
    78.66.Li
    Opis:
    We propose a method for measuring the thickness of the exfoliated MoSe₂ layers deposited on Si/SiO₂ substrate, based on the reflectance measurements performed with laser light illumination at two different wavelengths: red and green from confocal microscope at room temperature. We demonstrate the correlation between the number of layers in a flake and the value of its relative reflection difference. We applied the transfer matrix method to calculate the reflectivity and verify our experimental results. The approach proposed by us allows for fast and automatic verification of the exfoliated MoSe₂ layers thickness on large areas of the substrate.
    Źródło:
    Acta Physica Polonica A; 2017, 132, 2; 316-318
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Structural, Impedance, Dielectric and Modulus Analysis of $Li_{0.5-x}La_{0.5}Ti_{1-x}Nb_{x}O_3$ (x = 0, 0.05, 0.1, and 0.15)
    Autorzy:
    Vijaya Babu, K.
    Veeraiah, V.
    Subba Rao, P.
    Powiązania:
    https://bibliotekanauki.pl/articles/1418233.pdf
    Data publikacji:
    2012-10
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    61.05.cp
    68.37.Hk
    78.30.-j
    66.10.Ed
    Opis:
    The perovskite lithium lanthanum titanate shows high ionic conductivity at room temperature. Doping the lithium lanthanum titanate by niobium preserves the perovskite structure, which is synthesized by ceramic technology at high temperature (1300°C). The X-ray diffraction and scanning electron microscopy results show that the samples exhibit single phase. AC impedance measurements indicate total conductivity of about $8.93 \times 10^{-4}$ S/cm for composition of x = 0.05 at room temperature. The Raman spectra and cyclic voltammetry results of the compound are also reported.
    Źródło:
    Acta Physica Polonica A; 2012, 122, 4; 688-692
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Confocal Microscope Studies of $MoS_{2}$ Layer Thickness
    Autorzy:
    Grzeszczyk, M.
    Gołasa, K.
    Piętka, B.
    Babiński, A.
    Szczytko, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/1377207.pdf
    Data publikacji:
    2014-11
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    78.20.Ci
    63.20.dd
    78.30.-j
    78.66.Li
    Opis:
    We have been studying micro-luminescence of various exfoliated $MoS_{2}$ flakes using a confocal microscope. A crucial issue is to determine thickness of the investigated layer. The common way - using atomic force microscopy, electron microscopy or the Raman spectroscopy - requires moving the sample out from the confocal microscope experimental setup and looking for a particular exfoliated flake hidden among thousands of others. In order to preliminarily determine thickness of investigated layers we have performed a study on optical reflectivity and compared the results with the Raman spectroscopy investigations. In this way we were able to calibrate our experimental setup. Optical measurements are much faster than the Raman spectroscopy and can give a good estimation of $MoS_{2}$ thickness.
    Źródło:
    Acta Physica Polonica A; 2014, 126, 5; 1207-1208
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Vibration and Luminescence Spectroscopic Investigations of the Alkali Rare Earth Double Phosphates M$\text{}_{3}$(RE,Eu)(PO$\text{}_{4}$)$\text{}_{2}$ (M=K, Rb; RE=La, Gd)
    Autorzy:
    Kloss, M.
    Schwarz, L.
    Hölsä, J. P. K.
    Powiązania:
    https://bibliotekanauki.pl/articles/1995573.pdf
    Data publikacji:
    1999-03
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    61.50.-f
    61.66.Fn
    63.20.-e
    71.20.Dg
    71.20.Eh
    71.70.-d
    78.30.-j
    78.55.-m
    Opis:
    The room temperature IR- and Raman spectra of the different M$\text{}_{3}$RE(PO$\text{}_{4}$)$\text{}_{2}$ (M = K, Rb; RE = La, Eu, Gd) double phosphates were analysed and used to interpret the vibronic side band structure in the photoluminescence spectra. The intraconfigurational 4f-4f electronic transitions in the photoluminescence spectra of the Eu$\text{}^{3+}$ doped M$\text{}_{3}$RE(PO$\text{}_{4}$)$\text{}_{2}$ were analysed in detail. The crystal field fine structure of the $\text{}^{5}$D$\text{}_{0}$ → $\text{}^{7}$F$\text{}_{J}$ (J=0-4) transitions was analysed accounting for the information on the crystal structure. The effect of the temperature as well as the alkali host cation was evaluated. Finally, a preliminary crystal field energy level scheme for the $\text{}^{7}$F$\text{}_{J}$ (J=0-4) ground term was deduced from the analysis of the photo-luminescence as well as IR- and Raman spectra.
    Źródło:
    Acta Physica Polonica A; 1999, 95, 3; 343-349
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-11 z 11

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