Optical band-gap of Zn3As2 |
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Authors: | J Misiewicz JM Pawlikowski |
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Institution: | Institute of Physics, Wroclaw Technical University, 50-370 Wroclaw, St. Wyspiańskiego 27, Poland |
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Abstract: | Absorption measurements of single Zn3As2 crystals were made at temperatures 5, 80 and 300 K. Free-carrier absorption is interpreted in the simple classical model. Interband absorption shows contributions from Urbach-like excitations. The direct optical gap has been estimated as 0.99 eV at 300 K, 1.09 eV at 80 K and 1.11 eV at 5 K. The linear dependence of band-gap on temperature was found in the range 80–300 K with dEg/dT = ? 4.55 × 10?4eVK?1. |
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