Optical absorption in PbTe doped with Cr

Investigation of the temperature dependence of the internal friction in PbTe crystals

“…It should be noted that the samples were grown by the above-mentioned method with Cr introduced in the melt with quantities of 0.1 at%. A comparison of our data for PbTe and PbTe:Cr crystals with the data obtained by other authors [10] shows that, at dopant concentrations of nearly 0.1 at% Cr, the p-type conductivity changed to n-type. Moreover, the X-ray analysis proved that the solubility of the Cr inside the PbTe was not higher than 1.0 at% and Cr atoms did not change the lattice constant of the PbTe.…”

“…New applications of the IV-VI heterostructures were revealed in the last decade [7][8][9][10]. It is observed that the expansion of the elasticity limit of the active layers in the heterostructures is needed in order to increase the operating temperatures of the IR lasers and photodetectors.…”

Enhancement of Thermoelectric Performance of n‐Type PbSe by Cr Doping with Optimized Carrier Concentration

“…The resonant states could be responsible for the boosted Seebeck coefficient, power factor, and ZT at lower temperatures. It was reported that Cr is effective in increasing the Seebeck coefficient and power factor of PbTe with, however, no resonant effect from the Cr‐formed deep resonant level, which is 100 meV above the conduction band bottom of PbTe . A similar deep resonant level was also found in Cr‐doped PbSe with energy 124 meV above the conduction band bottom of PbSe .…”

Thermopower enhancement in Pb1−xMnxTe alloys and its effect on thermoelectric efficiency

“…32,37 It is not entirely clear whether Mn is electrically inactive 2 that only leads to small adjustments of the band energies (as has been assumed for PbSe and MgTe alloys), or whether transport property modifications are due to a resonant state effect from the possible multiple valencies in Mn compounds. Other 3d transition metals, such as Ti [49][50][51][52] and Cr, [52][53][54] exhibit resonant state effects in PbTe. It also should be noted that d-resonant states are believed to be less favorable than s-or p-states for improving zT of semiconductors.…”