ISSN:
1089-7550
Source:
AIP Digital Archive
Topics:
Physics
Notes:
Values of optical energy gap E0 as a function of pressure P up to 3 GPa at room temperature, and as a function of temperature T in the range 10–300 K at atmospheric pressure were obtained by optical-absorption measurements on samples of CuInTe2. It was shown that in this pressure range, E0 varies linearly with P, dE0/dP having a value of 2.2×10−2 eV/GPa. The variation of E0 with T was fitted well by a simple Manoogian–Leclerc equation of the form E0(0) − E0(T) = UT + Vcursive-phi (coth cursive-phi/2T−1). Both dE0/dP and U can be related to (dE0/dT)2, the lattice dilation contribution to the variation of the energy gap with temperature, and the values obtained in the two cases showed good agreement. The Vcursive-phi term can be related to (dE0/dT)1, the energy-gap variation due to electron-phonon interaction. From the values of (dE0/dT)1 and (dE0/dT)2, values were determined for the acoustic deformation potentials of the conduction band Ce and of the valence band Ch.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1063/1.349556
