Electron Gas Susceptibility LaTeX Source

\documentclass[aps,12pt,prb]{revtex4}

\begin{document}

\title{Graphene Critical Susceptbility}

\author{R. B. Laughlin}

\affiliation{Stanford}

\date{17 May 08}

\maketitle

\begin{displaymath}
\chi_q(\omega) = \frac{\chi_q^0(\omega)}{1 + 0.5 U 
\chi_q^0(\omega)}
\end{displaymath}
	
\begin{displaymath}
U_c = 3.52 t
\end{displaymath}

\end{document}