Effect of temperature variation on shift and broadening of exciton band in Cs₃Bi₂I₉ layered crystals

• Published in: Физика низких температур
• Date: 2004
• Main Authors: Machulin, V.F., Motsnyi, F.V., Peresh, E.Yu., Smolanka, O.M., Svechnikov, G.S.
• Format: Article
• Language: English
• Published: Фізико-технічний інститут низьких температур ім. Б.І. Вєркіна НАН України 2004
• Subjects: Квантовые эффекты в полупpоводниках и диэлектриках
• Online Access: https://nasplib.isofts.kiev.ua/handle/123456789/120368
• Journal Title: Digital Library of Periodicals of National Academy of Sciences of Ukraine
• Cite this: Effect of temperature variation on shift and broadening of exciton band in Cs₃Bi₂I₉ layered crystals / V.F. Machulin, F.V. Motsnyi, E.Yu. Peresh, O.M. Smolanka, G.S. Svechnikov // Физика низких температур. — 2004. — Т. 30, № 12. — С. 1283–1286. — Бібліогр.: 30 назв. — англ.

The exciton reflection spectra of Cs₃Bi₂I₉ layered crystals is investigated in the temperature region 4.2–300 K with light polarization E ⊥ c. It is estimated that the energy gap Eg equals 2.857 eV (T = 4.2 K) and the exciton binding energy Ry is 279 meV. A nontraditional temperature shift of...