Condensed Matter Physics, 2007, vol. 10, No. 1 (49), p. 39-43, English
DOI:10.5488/CMP.10.1.39
Title:
The band energy structure of RbKSO4 crystals
Author(s):
 
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O.V.Bovgyra
(Franko Lviv National University, Kyrylo and Mefodij, 8str., Lviv, 79005 Ukraine)
,
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V.Yo.Stadnyk
(Franko Lviv National University, Kyrylo and Mefodij, 8str., Lviv, 79005 Ukraine)
,
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A.V.Franiv
(Franko Lviv National University, Kyrylo and Mefodij, 8str., Lviv, 79005 Ukraine)
,
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M.R.Tuzyak
(Franko Lviv National University, Kyrylo and Mefodij, 8str., Lviv, 79005 Ukraine)
,
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O.Z.Chyzh
(Franko Lviv National University, Kyrylo and Mefodij, 8str., Lviv, 79005 Ukraine)
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The energy band structure of mechanically free and compressed RbKSO4 single crystals is investigated. It is established that the top of the valence band is located at the D point of the Brillouin zone [k = (0.5, 0.5, 0)], the bottom of the conduction band lies at the Γ point, and the minimum direct band gap Eg is equal to 5.80 eV. The bottom of the conduction band is predominantly formed by the K s, Li p, Rb s, and Rb p states hybridized with the S p and O p antibonding states. The pressure coefficients of the energy position of the valence and conduction band states and the band gap Eg are determined.
Key words:
uniaxial pressure, energy band, structure, valence band, conduction band
PACS:
71.20.Ps, 78.20.Ci
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