Comment on `Electronic Properties of Red P-Type Tl2S5 Single Crystals' |
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Authors: | M Cankurtaran H Celik |
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Institution: | Department of Physics, Faculty of Engineering, Hacettepe University, Beytepe, 06800 Ankara, Turkey |
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Abstract: | Recently, Gamal et al. Chin. Phys. Lett. 22 (2005) 1530] reported the results of electrical conductivity, Hall effect and thermoelectric measurements on p-type Tl2S5 single crystals. From the experimental data for the temperature dependence of differential thermoelectric power, Gamal et al. determined thevalues of 2.66×10-41kg and 2.50×10-41kg, respectively, for the effective masses of electrons and holes in p-type Tl2S5, which are about ten orders of magnitude smaller than the free electron mass (9.11×10-31kg). We argue that the anomalously small values obtained for the effective mass of chargecarriers in Tl2S5 have no physical significance. |
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Keywords: | 72 20 Fv 72 20 Pa 72 20 My 72 80 Ey |
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