Thermal conductivity doping effects

In fact, an apparent doping effect was also reported by Schwan et al. [39] in a-C(N) H films deposited by the highly ionized plasma beam deposition technique in C2H2-N2 atmospheres. Schwan et al. also observed thermally activated behavior for the conductivity. As reported by Silva et al. [14], they also observed increasing optical gap, and decreasing ESR spin signal, but the Urbach energy was found to increase. 

M. M. S. Fakhrabadi, A. Allahverdizadeh, V. Norouzifard, B. Dadashzadeh, Effects of boron doping on mechanical properties and thermal conductivities of carbon nanotubes., Solid State Communications, vol. 152, pp. 1973-1979, 2012. 

However, carbon doping was found to decrease the thermal conductivity of YB66 while not having a sizable detrimental effect on the other properties, and this could be a powerful method for improving the thermoelectric properties of higher borides in general (Mori and Tanaka, 2006). 

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