Infrared Vibrational Modes and Anisotropy of the Effective Ionic Charge in CuAlSe2, CuAlS2, and CuGaSe2 Crystals
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ANDRIESH, Andrei, SYRBU, Nicolae, YOVU, M., TĂZLĂVAN, Victor. Infrared Vibrational Modes and Anisotropy of the Effective Ionic Charge in CuAlSe2, CuAlS2, and CuGaSe2 Crystals. In: Physica Status Solidi (B) Basic Research, 1995, vol. 187, pp. 83-92. ISSN 0370-1972. DOI: https://doi.org/10.1002/pssb.2221870107
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Physica Status Solidi (B) Basic Research
Volumul 187 / 1995 / ISSN 0370-1972

Infrared Vibrational Modes and Anisotropy of the Effective Ionic Charge in CuAlSe2, CuAlS2, and CuGaSe2 Crystals

DOI:https://doi.org/10.1002/pssb.2221870107

Pag. 83-92

Andriesh Andrei1, Syrbu Nicolae2, Yovu M.1, Tăzlăvan Victor1
 
1 Academy of Sciences of Moldova,
2 Technical University of Moldova
 
 
Disponibil în IBN: 6 februarie 2024


Rezumat

Reflectivity spectra of CuAlS2, CuAlSe2, and CuGaSe2 crystals have been investigated in the wave number range 50 to 600 cm−1 for the polarizations E ‖ c and E ⊥ c. The fundamental phonon parameters, the limiting dielectric constants ε and εS and the reflectivity spectra contours have been calculated by using classical dispersion relations for both E ‖ c and E ‖ c configurations. The Szigeti effective charges and the relative ion charges of Cu, Al, Ga, Se, S anions and cations have been calculated in dependence on the incident light polarization. 

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<dc:creator>Andrieş, A.M.</dc:creator>
<dc:creator>Sîrbu, N.N.</dc:creator>
<dc:creator>Iovu, M.S.</dc:creator>
<dc:creator>Tăzlăvan, V.E.</dc:creator>
<dc:date>1995-01-01</dc:date>
<dc:description xml:lang='en'><p>Reflectivity spectra of CuAlS<sub>2</sub>, CuAlSe<sub>2</sub>, and CuGaSe<sub>2</sub>&nbsp;crystals have been investigated in the wave number range 50 to 600 cm<sup>&minus;1</sup>&nbsp;for the polarizations E ‖ c and E &perp; c. The fundamental phonon parameters, the limiting dielectric constants &epsilon;<sub>&infin;</sub>&nbsp;and &epsilon;<sub>S</sub>&nbsp;and the reflectivity spectra contours have been calculated by using classical dispersion relations for both E ‖ c and E ‖ c configurations. The Szigeti effective charges and the relative ion charges of Cu, Al, Ga, Se, S anions and cations have been calculated in dependence on the incident light polarization.&nbsp;</p></dc:description>
<dc:identifier>10.1002/pssb.2221870107</dc:identifier>
<dc:source>Physica Status Solidi (B) Basic Research  () 83-92</dc:source>
<dc:title>Infrared Vibrational Modes and Anisotropy of the Effective Ionic Charge in CuAlSe2, CuAlS2, and CuGaSe2 Crystals</dc:title>
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