Author:
Lee Seok-Joo,Kim Jae-Eun,Park Hae Yong
Abstract
The optical absorption spectra of cobalt-doped MgIn2S4, CdIn2S4, and HgIn2S4 single crystals grown by a chemical transport reaction were investigated at 7 K. The values of Dq and B calculated from the observed spectra show that the d electrons are more delocalized in the order of MgIn2S4, CdIn2S4, and HgIn2S4. Because this order corresponds to the decreasing order of the electronegativity differences between the metal and sulfur atoms of the host crystals, we conclude that as the metal-sulfur bonds in the host crystals are more covalent, the d electrons of the cobalt impurities are more spread out and the cobalt-sulfur bonds are also more covalent.
Publisher
Springer Science and Business Media LLC
Subject
Mechanical Engineering,Mechanics of Materials,Condensed Matter Physics,General Materials Science
Cited by
20 articles.
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