Long-Range Coulomb Interaction Versus Chemical Bonding Effects in the Theory of Metal-Insulator Transitions
In this work, we shall consider two aspects of the metal-insulator transition: (i) The jellium, model of electrons with interelectronic Coulomb repulsion e2/rij, but no account of electron-ion interaction apart from a uniform, non-responsive neutralizing background of positive charge; (ii) the competition between long-range Coulomb interelectronic repulsion and electron-ion interaction. However, more specifically, we shall focus on the chemical treatment of the metal-insulator transition in H, which is more than simply academic in view of the claims of Hawke et al. (1978) to have seen the transition from molecular H2 to metallic hydrogen. Then, more briefly, we take up the problem of possible metal-insulator behaviour of alkali atoms. Again, the chemical picture plays a predominant role in current theories.
KeywordsWigner Crystal Neutralize Background Metallic Hydrogen Electron Crystal Valence Bond Theory
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