title: Equation of state and Raman frequency of diamond from quantum Monte Carlo simulations.
abstract: We report variational and diffusion quantum Monte Carlo (VMC and DMC) calculations of the equation of state and Raman frequency of diamond. The pressure derivative of the bulk modulus, which has not been accurately determined experimentally, is calculated to be 3.8 (VMC) and 3.7 (DMC). The values of the Raman frequency calculated at the experimental volume are 1373 cm-1(VMC) and 1359 cm-1 (DMC), in good agreement with the experimental value of 1333 cm-1.
authors.affiliation: PRESTO, Japan Science and Technology Agency, 4-1-8 Honcho Kawaguchi, Saitama, Japan.
authors.forename: Ryo
authors.initials: R
authors.lastname: Maezono
authors.forename: A
authors.initials: A
authors.lastname: Ma
authors.forename: M D
authors.initials: MD
authors.lastname: Towler
authors.forename: R J
authors.initials: RJ
authors.lastname: Needs