We fit finite-temperature path integral Monte Carlo calculations of the exchange-correlation energy of the 3D finite-temperature homogeneous electron gas in the warm-dense regime (r_{ s} = (3/4\pi n)^{ 1/3} a_{ B}^{ -1} < 40 and \Theta = T/T_{ F} > 0.0625). In doing so, we construct a Pad\'{ e} approximant which collapses to Debye-H\"{ u}ckel theory in the high-temperature, low-density limit. Likewise, the zero-temperature limit matches the numerical results of ground-state quantum Monte Carlo, as well as analytical results in the high-density limit.
Categories: cond-mat.str-el cond-mat.other