Autor: Bunda, S. - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Anizotropy of Photoconductivity in BiOCl (X=Cl, Br, I) Single Crystals
Autorzy:: Komanicky, V.
Bunda, S.
Botko, M.
Bunda, V.
Powiązania:: https://bibliotekanauki.pl/articles/1368699.pdf
Data publikacji:: 2014-07
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: 42.25.Ja
42.70.Qs
72.40.+w
Opis:: Oxyhalides of bismuth BiOX (X = Cl, Br, I) are very interesting materials which find various applications as X-ray luminescent screens, as anti-Stokes converters, photocatalyst, usual luminophors and as photoconductive analyzer of linear polarized radiation in the 0.24 - 1.2 μm spectral region. The great interest for these materials is strongly related to the influence of dimensionality on the behaviour of physical properties (they are 2D structured materials). Bismuth oxyhalides are one of the V-VI-VII group compound semiconductors belonging to the tetragonal system. The structure of BiOX is known to have a layered structure, which is constructed by the combination of the halide ion layer and the bismuth oxygen layer. We present results of the study of photoconductivity spectra anisotropy of the BiOX single crystals.
Źródło:: Acta Physica Polonica A; 2014, 126, 1; 274-275
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki

Artykuł

Skocz do pozycji: 2.

Tytuł:: Application of Superconductor/Photosemiconductor Contact Structures in Electronics
Autorzy:: Bunda, V.
Bunda, S.
Komanicky, V.
Botko, M.
Čižmár, E.
Feher, A.
Powiązania:: https://bibliotekanauki.pl/articles/1202071.pdf
Data publikacji:: 2014-07
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: 74.45.+c
74.78.-w
85.25.Hv
Opis:: In recent years, two-dimensional (2D) nanostructured materials, such as nanoplates and nanosheets, have attracted much attention because of their unique electronic, magnetic, optical, and catalytic properties, which mainly arise from their large surface areas, nearly perfect crystallinity, structural anisotropy, and quantum confinement effects in the thickness. The 2D nanostructured materials can be used as building blocks for advanced materials and devices with designed functions in areas as diverse, as lasers, transistors, catalysis, solar cells, light emission diodes, chemical and biological sensors. We report physical properties of YBCO/BiOI contact structures and electrophysical properties of BiOI single crystal.
Źródło:: Acta Physica Polonica A; 2014, 126, 1; 362-363
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki

Artykuł

Skocz do pozycji: 3.

Tytuł:: Raman Spectra of Bismuth Oxyhalide Single Crystals
Autorzy:: Bunda, S.
Bunda, V.
Powiązania:: https://bibliotekanauki.pl/articles/1368693.pdf
Data publikacji:: 2014-07
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: 62.22.-m
78.30.Am
78.30.Fs
Opis:: Oxyhalogenides of bismuth BiOX (X=Cl, Br and I) are very interesting materials which find various applications as X-ray luminescent screens, anti-Stokes (frequency upshift) converters, luminophors, and photoconducting analyzers of linear polarized radiation. Since each primitive cell consist of six monoatomic sites, the structure of the reduced representation of the 15 normal modes of vibration is: Γ= $2A_{1g}(Ra.)+B_{1g}(Ra.)+ 3E_{g}(Ra.)+ 2A_{2u}(i.r.)+ 2E_{u}(i.r.)$, in which the vibrations of $A_{1g}$, $B_{1g}$ and $E_{g}$ species are active in the Raman spectrum and those of $A_{2u}$ and $E_{u}$ species are active in the infrared (i.r.) spectrum. The Raman active modes are observed in frequency range 55 - 225 $cm^{-1}$, 50 - 185 $cm^{-1 }$, and 45 - 175 $cm^{-1}$ for the BiOCl, BiOBr and BiOI single crystals respectively.
Źródło:: Acta Physica Polonica A; 2014, 126, 1; 272-273
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki

Artykuł

Skocz do pozycji: 4.

Tytuł:: Ferroelastic Phase Transition in a Layered Bismuth Oxychloride Single Crystals
Autorzy:: Bunda, V.
Bunda, S.
Vashchuk, F.
Feher, A.
Kajňaková, M.
Kováč, J.
Syrkin, E.
Powiązania:: https://bibliotekanauki.pl/articles/1535538.pdf
Data publikacji:: 2010-11
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: 64.70.K-
81.30.-t
65.40.-b
Opis:: We report the results of low-temperature specific-heat, magnetization, and X-ray diffraction measurements on a bismuth oxyhalide (BiOCl) single crystal. We conclude that BiOCl in temperature region 150-230 K shows "antiferroelastic-paraelectric" phase transitions at critical temperatures $T_{c1}$ = 167.5 K and $T_{c2}$ = 214.6 K, respectively.
Źródło:: Acta Physica Polonica A; 2010, 118, 5; 1069-1070
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki

Artykuł

Skocz do pozycji: 5.

Tytuł:: Low Temperature Specific Heat of BiOX (X = Cl, Br, and I) Single Crystals
Autorzy:: Bunda, V.
Bunda, S.
Kajňakova, M.
Feher, A.
Syrkin, E.
Feodosyev, S.
Powiązania:: https://bibliotekanauki.pl/articles/1535050.pdf
Data publikacji:: 2010-11
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: 65.40.-b
63.22.Np
Opis:: Low temperature specific heat of layered bismuth oxyhalide crystals has been studied in the temperature range from 2 to 50 K in zero and 8 T magnetic field. The expected Debye-like behaviour at the lowest temperatures (below 4-5 K) is established. Linear dependences of entropy and the Debye temperature as cross-correlation parameters are established. The small values of the Debye temperature and peculiarities of phonon spectra at lowest temperatures are discussed.
Źródło:: Acta Physica Polonica A; 2010, 118, 5; 986-987
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki

Artykuł

Skocz do pozycji: 6.

Tytuł:: Physical Properties of "HTSC/Photosemiconductor" Micro- and Nanoplates Based Junctions
Autorzy:: Bunda, V.
Bunda, S.
Vashchuk, F.
Feher, A.
Kováč, J.
Powiązania:: https://bibliotekanauki.pl/articles/1535401.pdf
Data publikacji:: 2010-11
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: 85.25.Hv
74.45.+c
74.25.F-
74.55.+v
Opis:: In this paper we report the formation process and electrophysical properties of 'high temperature superconductor $(YBa_2Cu_3O_{7 - x})$/photosemiconductor (BiOCl:Ti)' micro- and nanoplates based junction. The energy band model of ≪HTSC-semiconductor≫ junction is proposed.
Źródło:: Acta Physica Polonica A; 2010, 118, 5; 1040-1041
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki

Artykuł

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