We calculate the Hartree-Fock energy bands of solid hydrogen in the cubic phase, using a plane-wave-basis set. The novelty of our approach is that, by the expression of the crystal density matrix in terms of localized Gaussian functions, all the matrix elements necessary to calculate the energy bands (including those of the nonlocal exchange operator) can be computed in closed analytical form. This is achieved by the extension to molecular crystals of a technique previously applied to solid rare gases. We compare our results with previous theoretical work, and with available experimental data. In particular, we provide a new interpretation of recent photoemission measurements on thick H2 films deposited on noble metals. The effects of the molecular steric order on the electron states are also briefly discussed.

Hartree-Fock energy bands in molecular crystals : Solid hydrogen in the cubic phase

GIANNOZZI, Paolo;
1984-01-01

Abstract

We calculate the Hartree-Fock energy bands of solid hydrogen in the cubic phase, using a plane-wave-basis set. The novelty of our approach is that, by the expression of the crystal density matrix in terms of localized Gaussian functions, all the matrix elements necessary to calculate the energy bands (including those of the nonlocal exchange operator) can be computed in closed analytical form. This is achieved by the extension to molecular crystals of a technique previously applied to solid rare gases. We compare our results with previous theoretical work, and with available experimental data. In particular, we provide a new interpretation of recent photoemission measurements on thick H2 films deposited on noble metals. The effects of the molecular steric order on the electron states are also briefly discussed.
File in questo prodotto:
Non ci sono file associati a questo prodotto.

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11390/670897
 Attenzione

Attenzione! I dati visualizzati non sono stati sottoposti a validazione da parte dell'ateneo

Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 7
  • ???jsp.display-item.citation.isi??? ND
social impact