Treatment of a semi-metal to metal structural phase transition:   convergence properties of the A7 to sc transition of arsenic
  The material presented here is supplementary to the article entitled: "Density-functional investigation of the rhombohedral to simple cubic phase transition of arsenic"; it deals with the convergence issues involved in studying a semi-metal to metal structural phase transition such as the A7 to sc transition of arsenic. 
Patricia Silas, Jonathan R. Yates, Peter D. Haynes