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SUMMARY:Nature of the Metalization Transition in Solid Hydrogen - Sam Azad
 i (Imperial College London)
DTSTART:20161130T110000Z
DTEND:20161130T120000Z
UID:TALK69422@talks.cam.ac.uk
CONTACT:Joseph Nelson
DESCRIPTION:In this talk an accurate study of the static-nucleus electroni
 c energy band gap of solid molecular hydrogen at high pressure will be pre
 sented.  The excitonic and quasiparticle energy band gaps of four molecula
 r structures at pressures of 250\, 300\, and 350 GPa are calculated using 
 the fixed-node diffusion quantum Monte Carlo (DMC) method.  The difference
  between the mean-field and many-body band gaps at the same density is fou
 nd to be almost independent of system size and can therefore be applied as
  a scissor correction to the mean-field gap of an infinite system to obtai
 n an estimate of the many-body gap in the thermodynamic limit.
LOCATION:TCM Seminar Room\, Cavendish Laboratory
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