@article{e8c04ad519584fa7832ecae133a2b40a,
title = "Energy-gap dependence on the Mn mole fraction and temperature in CdMnTe crystal",
abstract = "We measured the dependence of the energy gap in Bridgman-grown Cd 1-x Mnx Te crystals, 0≤x≤0.25, on the Mn mole fraction and temperatures from 40 to 300 K. We determined the Mn mole fraction and energy gap, respectively, from electron probe microanalysis and near-infrared Fourier-transform infrared transmission spectra. The energy gap increased linearly with an increase in the Mn content in the crystal and with a decrease in temperature. We formulated new equations from these experimental results, wherein we expressed the energy gap as a function of Mn mole fraction and temperature. Also, we compare our findings with published results.",
author = "Kim, {K. H.} and Bolotnikov, {A. E.} and Camarda, {G. S.} and G. Yang and A. Hossain and Y. Cui and James, {R. B.} and J. Hong and Kim, {S. U.}",
note = "Funding Information: This work was supported by the U.S. Department of Energy, Office of Nonproliferation Research and Development, Grant No. NA-22. The manuscript has been authored by Brookhaven Science Associates, LLC under Contract No. DE-AC02-98CH1-886 with the U.S. Department of Energy. Table I. The coefficient of temperature gradient in CMT with different Mn mole fractions. The former values are slightly increased to the Mn mole fraction. Mn mole fraction ( x ) Temperature gradient of the energy gap ( × 10 − 4 eV / K ) 0 −3.68 0.04 −4.32 0.1 −4.86 0.15 −5.33 0.21 −5.73 0.25 −5.98 FIG. 1. NIR-transmission spectra of CMT samples with different Mn mole fractions ( x ) at 300 K. A CdTe sample ( x = 0 ) was measured as the reference material. The threshold wavelength, which is half of the maximum transmittance, is denoted in the figure by the straight line. FIG. 2. Energy-gap dependence on the Mn mole fraction in CdMnTe at 300 K. The dotted line plots data for CMT taken from Ref. 11 . Our data well agree with the findings of Kullendorff and H{\"o}k (Ref. 10 ) but not with those of Zhang et al. (Ref. 15 ). FIG. 3. Temperature dependence of the energy gap on the Mn mole fraction. The slope ( d E g / d x ) rises as the Mn mole fraction increases. ",
year = "2009",
doi = "10.1063/1.3176955",
language = "English",
volume = "106",
journal = "Journal of Applied Physics",
issn = "0021-8979",
publisher = "American Institute of Physics Publising LLC",
number = "2",
}