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    Wyświetlanie 1-13 z 13
    Tytuł:
    4f Contribution to Valence Band of Pb$\text{}_{1-x}$RE$\text{}_{x}$S (RE = Eu,Gd) Studied by Resonant Photoemission
    Autorzy:
    Kowalski, B. J.
    Gołacki, Z.
    Guziewicz, E.
    Orłowski, B. A.
    Ghijsen, J.
    Johnson, R. L.
    Powiązania:
    https://bibliotekanauki.pl/articles/1952558.pdf
    Data publikacji:
    1996-11
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    71.25.Tn
    79.60.-i
    Opis:
    Resonant photoemission experiments were carried out in order to reveal the contributions of partly filled Eu 4f$\text{}^{7}$ and Gd 4f$\text{}^{7}$ shells to the valence bands of Pb$\text{}_{0.95}$Eu$\text{}_{0.05}$S and Pb$\text{}_{0.95}$Gd$\text{}_{0.05}$S crystals. The coupling between these orbitals and the host electronic states is discussed.
    Źródło:
    Acta Physica Polonica A; 1996, 90, 5; 1035-1039
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    4f Shell of Gd$\text{}^{2+}$ and Gd$\text{}^{3+}$ Ions in Sn$\text{}_{1-x}$Gd$\text{}_{x}$Te - Resonant Photoemission Study
    Autorzy:
    Kowalski, B. J.
    Gołacki, Z.
    Guziewicz, E.
    Orłowski, B.
    Johnson, R. L.
    Powiązania:
    https://bibliotekanauki.pl/articles/1968282.pdf
    Data publikacji:
    1997-11
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    71.20.-b
    79.60.-i
    Opis:
    Resonant photoemission spectra of Sn$\text{}_{1-x}$Gd$\text{}_{x}$Te (x=0.02 and 0.08) measured for the photon energy range 142 to 151 eV show the valence band density of states distribution and the Gd 4f derived maximum. The energy position of the J=0 component of the Gd 4f maximum was determined and used as a measure of the Gd 4f shell binding energy. The electrostatic model of core level shifts was used to interpret the difference in the Gd 4f binding energies observed for x=0.02 and x=0.08.
    Źródło:
    Acta Physica Polonica A; 1997, 92, 5; 875-878
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Band Structure of Mn/ZnTe Studied, by Angle-Resolved Photoelectron Spectroscopy
    Autorzy:
    Kowalski, B. J.
    Orlowski, B. A.
    Pietrzyk, M.
    Kaczor, P.
    Kopalko, K.
    Mickievicius, S.
    Johnson, R. L.
    Powiązania:
    https://bibliotekanauki.pl/articles/2044491.pdf
    Data publikacji:
    2005-11
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    79.60.-i
    71.23.-k
    Opis:
    The electronic band structure of Mn/ZnTe(110) (1×1) has been studied by angle-resolved photoelectron spectroscopy. The sets of spectra were acquired for the clean surface and after in situ deposition of 0.4 ML of Mn, in order to compare the band structures and to reveal changes brought about by the presence of Mn. The experimental band structure diagram of Mn/ZnTe along theΓ-K direction in the Brillouin zone has been derived from the experimental data. Indications of interaction between the Mn 3d states and sp$\text{}^{3}$ bands of the semiconductor are discussed.
    Źródło:
    Acta Physica Polonica A; 2005, 108, 5; 735-740
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Cd_{1-x}Fe_{x}Te Ternary Crystal Formation Studied by Resonant Photoemission
    Autorzy:
    Guziewicz, E.
    Kowalski, B. J.
    Gołacki, Z.
    Orłowski, B. A.
    Johnson, R. L.
    Masek, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/1968113.pdf
    Data publikacji:
    1997-10
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    68.35.Fx
    79.60.-i
    Opis:
    A resonant photoemission was used to study the ternary crystal formation, when small amount of Fe atoms was deposited (in one monolayer range of thickness) on the clean CdTe(100) surface. The constant initial state spectra taken near the Fe 3p-3d transition after Fe deposition and then again after heating process show the existence of two Fano-like resonance. The differences of the energy distribution curves taken for both resonance and antiresonance, respectively, allow us to distinguish two kind of Fe 3d contributions to the valence band: one derived from the metallic Fe islands on the surface and the second - derived from the Fe atoms built into the Cd$\text{}_{1-x}$Fe$\text{}_{x}$Te crystal.
    Źródło:
    Acta Physica Polonica A; 1997, 92, 4; 793-796
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Cr 3d Surface and Bulk States in Sn$\text{}_{1-x}$Cr$\text{}_{x}$Te/Cr Crystals
    Autorzy:
    Guziewicz, E.
    Szamota-Sadowska, K.
    Kowalski, B. J.
    Grodzicka, E.
    Story, T.
    Orłowski, B. A.
    Johnson, R. L.
    Powiązania:
    https://bibliotekanauki.pl/articles/1963380.pdf
    Data publikacji:
    1997-04
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    68.35.Fx
    79.60.-i
    Opis:
    We report a new approach to investigate metal-semiconductor interface formation. Photoemission spectroscopy was applied in order to investigate the clean surface of a Sn$\text{}_{0.97}$Cr$\text{}_{0.03}$ Te crystal and to observe its changes under sequential deposition of small amounts of Cr atoms. In order to analyse the Cr 3d contribution to the valence band, the Fano-type resonance tuned to the Cr 3p-3d transition was used. The experiment was designed to follow the Sn$\text{}_{0.97}$Cr$\text{}_{0.03}$ Te/Cr interface formation process. At the clean Sn$\text{}_{0.97}$Cr$\text{}_{0.03}$Te surface, the Cr 3d states contribution to the valence band was found to be positioned 0.8 eV below the Fermi level. After the Cr deposition processes the contribution shifted to a higher binding energy and another contribution 5.8 eV below the Fermi level was also observed.
    Źródło:
    Acta Physica Polonica A; 1997, 91, 4; 783-787
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Fano Resonance of Eu$\text{}^{2+}$ and Eu$\text{}^{3+}$ in (Eu,Gd)Te MBE Layers
    Autorzy:
    Orlowski, B. A.
    Kowalski, B. J.
    Dziawa, P.
    Pietrzyk, M.
    Mickievicius, S.
    Osinniy, V.
    Taliashvili, B.
    Kowalik, I. A.
    Story, T.
    Johnson, R. L.
    Powiązania:
    https://bibliotekanauki.pl/articles/2044511.pdf
    Data publikacji:
    2005-11
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    79.60.-i
    71.20.Mq
    Opis:
    Resonant photoemission spectroscopy, with application of synchrotron radiation, was used to study the valence band electronic structure of clean surface of (EuGd)Te layers. Fano-type resonant photoemission spectra corresponding to the Eu 4d-4f transition were measured to determine the contribution of 4f electrons of Eu$\text{}^{2+}$ and Eu$\text{}^{3+}$ ions to the valence band. The resonant and antiresonant photon energies of Eu$\text{}^{2+}$ ions were found as equal to 141 V and 132 eV, respectively and for Eu$\text{}^{3+}$ ions were found as equal to 146 eV and 132 eV, respectively. Contribution of Eu$\text{}^{2+}$4f electrons was found at the valence band edge while for Eu$\text{}^{3+}$ it was located in the region between 3.5 eV and 8.5 eV below the valence band edge.
    Źródło:
    Acta Physica Polonica A; 2005, 108, 5; 803-807
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Fe 3d Contribution to the Valence Band of Cubic Hg$\text{}_{1-x}$Fe$\text{}_{x}$S - Resonant Photoemission Study
    Autorzy:
    Kowalski, B. J.
    Orłowski, B. A.
    Szuszkiewicz, W.
    Witkowska, B.
    Johnson, R. L.
    Powiązania:
    https://bibliotekanauki.pl/articles/1933837.pdf
    Data publikacji:
    1995-10
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    79.60.-i
    Opis:
    Resonant photoemission spectra of cubic Ηg$\text{}_{0.94}$Fe$\text{}_{0.06}$S were measured for photon energies near to the energy of intra atomic Fe 3p$\text{}^{6}$3d$\text{}^{6}$ → 3p$\text{}^{5}$3d$\text{}^{7}$ transition. The difference between the spectra taken at resonance and antiresonance is presented as a measure of the energy distribution of Fe 3d derived states. The results obtained show that Fe 3d states contribute to the whole valence band with a distinct structure appearing at the band edge.
    Źródło:
    Acta Physica Polonica A; 1995, 88, 4; 791-794
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Gd 4f and 5d Electrons in Sn$\text{}_{0.96}$Gd$\text{}_{0.04}$Te Valence Band
    Autorzy:
    Orłowski, B. A.
    Kowalski, B. J.
    Gołacki, Z.
    Story, T.
    Johnson, R. L.
    Powiązania:
    https://bibliotekanauki.pl/articles/1933933.pdf
    Data publikacji:
    1995-11
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    79.60.-i
    71.20.Fi
    Opis:
    The synchrotron radiation was applied to measure resonant photoemission spectra (Fano-type Gd 4d-4f resonance), constant initial states and constant final states to study the valence band electronic structure of Sn$\text{}_{0.96}$Gd$\text{}_{0.04}$Te crystal. The resonant energy was found equal to 150.3 eV. The electrons 4f were found to contribute to the valence band of the crystal with the maximum located at 9.5 eV below the valence band edge whereas 5d electrons contribute at the crystal valence band edge.
    Źródło:
    Acta Physica Polonica A; 1995, 88, 5; 857-860
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Influence of Yb on Valence Band Density of States of CdYbTe and PbYbTe - a Resonant Photoemission Study
    Autorzy:
    Szamota-Sadowska, K.
    Kowalski, B. J.
    Guziewicz, E.
    Orłowski, B. A.
    Sadowski, J.
    Gołacki, Z.
    Ghijsen, J.
    Johnson, R. L.
    Belkhou, R.
    Radosavkič, D.
    Martinotti, D.
    Barrett, N.
    Guillot, C.
    Powiązania:
    https://bibliotekanauki.pl/articles/1952185.pdf
    Data publikacji:
    1996-11
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    61.72.Vv
    Opis:
    Photoemission measurements using synchrotron radiation were performed on PbYbTe (bulk crystal) and CdYbTe (MBE thin film). The resonant enhancement of the photoemission was applied for investigation of the contribution of Yb 4f electrons to the valence band. The set of the energy distribution curves was collected for energies in the region close to the 4d-4f Fano transition. The Yb 4f$\text{}^{14}$ were observed at the binding energies close to the edge of the valence band while the 4f$\text{}^{13}$ states were revealed deep in the valence band.
    Źródło:
    Acta Physica Polonica A; 1996, 90, 5; 943-946
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Photoemission Study of Mn 3d Electrons in the Valence Band of Mn/GeMnTe
    Autorzy:
    Pietrzyk, M. A.
    Kowalski, B. J.
    Orłowski, B. A.
    Knoff, W.
    Osinniy, V.
    Kowalik, I. A.
    Story, T.
    Johnson, R. L.
    Powiązania:
    https://bibliotekanauki.pl/articles/2047678.pdf
    Data publikacji:
    2007-08
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    79.60.-i
    71.20.Mq
    Opis:
    We present the results of the electronic band structure study of Ge$\text{}_{0.9}$Mn$\text{}_{0.1}$Te epilayers, clean and modified in situ by deposition of manganese atoms. The sets of resonant photoemission spectra were measured for the photon energy range covering the energy of Mn 3p→3d transition (45
    Źródło:
    Acta Physica Polonica A; 2007, 112, 2; 275-281
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Resonant Photoemission Study of Gd 4f States in IV-VI Crystals
    Autorzy:
    Kowalski, B. J.
    Gołacki, Z.
    Guziewicz, E.
    Orłowski, B. A.
    Ghijsen, J.
    Johnson, R. L.
    Powiązania:
    https://bibliotekanauki.pl/articles/1963391.pdf
    Data publikacji:
    1997-04
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    79.60.-i
    Opis:
    Resonant photoemission experiments were performed in order to reveal the contributions of half-filled Gd 4f$\text{}^{7}$ shell to the electronic structures of Sn$\text{}_{0.95}$Gd$\text{}_{0.05}$Te and Pb$\text{}_{0.95}$Gd$\text{}_{0.05}$S crystals. The influences of the Gd 4f$\text{}^{6}$ final-state multiplet splitting and f-ligand hybridization on the shapes of the spectra are discussed.
    Źródło:
    Acta Physica Polonica A; 1997, 91, 4; 819-823
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Resonant Photoemission Study of Mn 3d Electrons Contribution to the Pb$\text{}_{0.92}$Mn$\text{}_{0.08}$Se Valence Band
    Autorzy:
    Orłowski, B. A.
    Kowalski, B. J.
    Le Van, Khoi
    Gałązka, R. R.
    Ghijsen, J.
    Johnson, R. L.
    Powiązania:
    https://bibliotekanauki.pl/articles/1872563.pdf
    Data publikacji:
    1995-02
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    71.20.Fi
    79.60.-i
    Opis:
    The resonant photoemission spectroscopy was applied to investigate the valence band electronic structure of semimagnetic semiconductor Pb$\text{}_{0.92}$Mn$\text{}_{0.08}$Se crystal and to determine the contribution of Mn 3d electrons to the valence band. The set of energy distribution curves and constant initial states spectra were taken for by energies in the region (40-60 eV) close to the Mn 3p-3d transition. The electrons Mn 3d hybridize and contribute to the valence band electrons of the crystal and main density of states contribution appears in the energy 3.5 ± 0.2 eV below the valence band edge.
    Źródło:
    Acta Physica Polonica A; 1995, 87, 2; 329-332
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Valence Band Density of States and Mn 3d Contribution in Mn$\text{}_{1-x}$Mg$\text{}_{x}$Te
    Autorzy:
    Kowalski, B. J.
    Guziewicz, E.
    Kopalko, K.
    Orłowski, B. A.
    Janik, E.
    Wojtowicz, T.
    Johnson, R. L.
    Powiązania:
    https://bibliotekanauki.pl/articles/1991616.pdf
    Data publikacji:
    1998-09
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    71.20.Nr
    79.60.-i
    Opis:
    Resonant photoemission spectroscopy was applied to determine the Mn 3d derived contribution to the valence band density of states of Mn$\text{}_{0.44}$ Mg$\text{}_{0.56}$Te grown by molecular beam epitaxy on a GaAs(001) substrate. The modifications of the valence band density-of-states distribution are discussed as a consequence of the substitution of Mg ions for Mn ions.
    Źródło:
    Acta Physica Polonica A; 1998, 94, 3; 401-405
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-13 z 13

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