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1,329 results on '"Berger, I"'

203. Structural, vibrational, electronic, and luminescence properties of the cyclotetravanadates A(2)M(VO3)(4) (A=Na,Ag; M=Ca,Sr)

Author

Zubkov, V. G., Surat, L. L., Tyutyunnik, A. P., Berger, I. F., Tarakina, N. V., Slobodin, B. V., Kuznetsov, M. V., Denisova, T. A., Zhuravlev, N. A., Perelyaeva, L. A., Baklanova, I. V., Shein, I. R., Ivanovskii, A. L., Shulgin, B. V., Ishchenko, A. V., Tcherepanov, A. N., Svensson, Gunnar, Forslund, Bertil, Skripkin, M. Yu., Zubkov, V. G., Surat, L. L., Tyutyunnik, A. P., Berger, I. F., Tarakina, N. V., Slobodin, B. V., Kuznetsov, M. V., Denisova, T. A., Zhuravlev, N. A., Perelyaeva, L. A., Baklanova, I. V., Shein, I. R., Ivanovskii, A. L., Shulgin, B. V., Ishchenko, A. V., Tcherepanov, A. N., Svensson, Gunnar, Forslund, Bertil, and Skripkin, M. Yu.

Abstract

The physical properties of the family of cyclotetravanadates A(2)M(VO3)(4), where A=Na,Ag and M=Ca,Sr, have been studied by means of x-ray powder diffraction, neutron diffraction, electron diffraction, infrared, Raman, NMR, photoexcitation and pulse cathode beam excitation, and x-ray photoelectron spectroscopies, and band structure calculations. The differences between the structural, vibrational, luminescence, and electronic properties of the alkali metal-containing [Na2Ca(VO3)(4) and Na2Sr(VO3)(4)] and the d metal-containing cyclotetravanadates [Ag2Ca(VO3)(4) and Ag2Sr(VO3)(4)] are analyzed. Na2Ca(VO3)(4), Ag2Ca(VO3)(4), Na2Sr(VO3)(4), and Ag2Sr(VO3)(4) have tetragonal structures, P4/nbm, with a=10.438 49(6), 10.445 24(5), 10.634 49(4), and 10.625 74(6), and c=4.938 73(5), 4.968 45(5), 4.962 05(4), and 4.979 30(4) angstrom, respectively. The main structural feature of A(2)M(VO3)(4) is the tetracyclic [V4O12] units. The hybridized O 2p-V 3d states of the tetracyclic [V4O12] units have a dominant influence on the electronic structure of these compounds. The compounds are semiconducting with a local density approximation band gap increasing, from 1.85 eV for Ag2Ca(VO3)(4) to 3.02 eV for Na2Ca(VO3)(4). The prospects of these compounds as advanced materials for detectors of photon and corpuscular radiation as well as for color correction of light emission sources such as lamp and light emitting diode sources are discussed., authorCount :19

Published
2008
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212. Erweiterte Konsensusklassifikation

Author

Krenn, V., primary, Morawietz, L., additional, Kienapfel, H., additional, Ascherl, R., additional, Matziolis, G., additional, Hassenpflug, J., additional, Thomsen, M., additional, Thomas, P., additional, Huber, M., additional, Schuh, C., additional, Kendoff, D., additional, Baumhoer, D., additional, Krukemeyer, M.G., additional, Perino, G., additional, Zustin, J., additional, Berger, I., additional, Rüther, W., additional, Poremba, C., additional, and Gehrke, T., additional

Published
2013
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214. Thermal Expansion and Luminescent Properties of Triorthogermanates CaLa2-xEuxGe3O10(x= 0.0–0.6)

Author

Lipina, O., Surat, L., Baklanova, Ya., Berger, I., Tyutyunnik, A., and Zubkov, V.

Abstract

Solid solutions CaLa2-xEuxGe3O10(x= 0.0–0.6, Δx= 0.1) have been synthesized for the first time. The compounds are isostructural to CaLa2Ge3O10, they crystallize in the monoclinic system, space group P21/c, Z= 4. The low-temperature X-ray diffraction studies have revealed the strain anisotropy of germanate CaLa2Ge3O10crystal lattice in the temperature range 80–298 K, and the linear thermal expansion coefficients have been calculated. The optical properties of the activated phases have been studied, and the influence of the dopant concentration and the excitation wavelength on the luminescence characteristics of the synthesized compounds has been established.

Published
2018
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223. Architecture of the Mediator Head module

Author

Imasaki, T., primary, Calero, G., additional, Cai, G., additional, Tsai, K.L., additional, Yamada, K., additional, Cardelli, F., additional, Erdjument-Bromage, H., additional, Tempst, P., additional, Berger, I., additional, Kornberg, G.L., additional, Asturias, F.J., additional, Kornberg, R.D., additional, and Takagi, Y., additional

Published
2011
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225. Beheadings 'aim to force out Thai Buddhists'

Author

Bangkok, Sebastien Berger I N.

Abstract

ISLAMIST militants in southern Thailand are trying to terrify Buddhist residents into fleeing, its prime minister said yesterday after a man was publicly beheaded. The murder of Lek Pongpla, 34, […]

Published
2005

226. Burmese junta denies Suu Kyi birthday freedom

Author

Rangoon, Sebastien Berger I N.

Abstract

THE world's only incarcerated Nobel peace laureate will mark her 60th birthday under house arrest tomorrow, with her political party paralysed and her country deadlocked. Aung San Suu Kyi, the […]

Published
2005

241. Investigation of stacking disorder in Li2SnO3

Author

Tarakina, N. V., primary, Denisova, T. A., additional, Maksimova, L. G., additional, Baklanova, Y. V., additional, Tyutyunnik, A. P., additional, Berger, I. F., additional, Zubkov, V. G., additional, and Van Tendeloo, G., additional

Published
2009
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245. Pressure effects in CeNi

Author

Mirmelstein, A., primary, Clementyev, E., additional, Kerbel, O., additional, Kozlenko, D., additional, Akshentsev, Yu., additional, Voronin, V., additional, and Berger, I., additional

Published
2009
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