A multiphase equation of state for Be based on the modified mean-field potential approach

We present a first-principles scheme to study the multiphase equation of state (EOS) for Be, based on our recently developed modified mean-field potential (MMFP) approach. We first calculate the EOS for Be of hcp and bcc structure, and then compute the melting curve of Be by using MMFP approach. At last, based on the EOS of bcc Be and melting curve and considing the effcet of the melting entropy, we obtain the EOS of liquid Be. Based on the results, we obtain the multiphase EOS of Be. The calcutlated Hugoiot of solid and liquid phase as well as the melting curve are in agreement with available experimental data.