Abstract
Complex dielectric function for liquid Se-Tl mixtures has been obtained by ellipsometric measurements at temperatures between 300 and 500°C. The optical gap decreases rapidly with increasing Tl-concentration in the low concentration region less than 15 at.% Tl, while it remains nearly constant for higher concentrations up to 40 at.% Tl. A long-standing problem of the discrepancy between the activation energies of the electrical conductivity and thermopower can be resolved by considering the temperature dependence of the energy gap precisely.
Original language | English |
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Article number | 044708 |
Journal | journal of the physical society of japan |
Volume | 77 |
Issue number | 4 |
DOIs | |
Publication status | Published - 2008 Apr |
Externally published | Yes |
Keywords
- Conductivity
- Dielectric function
- Ellipsometry
- Energy gap
- Liquid
- Mixture
- Selenium
- Thallium
- Thermopower
ASJC Scopus subject areas
- Physics and Astronomy(all)