scispace - formally typeset
Search or ask a question

Showing papers on "Mott transition published in 1984"


Journal ArticleDOI
TL;DR: In this paper, the metal-nonmetal transition in expanded liquid mercury is compared to the dielectric transition in dense liquid mercury vapor, and the permanent dipole moments of the condensed excitons are estimated as a ferroelectric phase; the critical exponents of the liquid-gas transition therefore become classical.
Abstract: We relate the metal-nonmetal transition in expanded liquid mercury to the dielectric transition in dense mercury vapor Condensation of Frenkel excitons into an excitonic-insulator phase is shown to occur at the dielectric transition The excitons unbind at the associated (Mott) metal-nonmetal transition The permanent dipole moments of the condensed excitons are estimated to order as a ferroelectric phase; the critical exponents of the liquid-gas transition therefore become classical

38 citations


Journal ArticleDOI
TL;DR: In this paper, the Coulomb forces were considered in a Debye-Thomas-Fermi approach to calculate the properties of hot nuclear matter, and it was shown that the inclusion of the forces implies a decrease of the cluster bound-state energy and a lowering of the nuclear density at the cluster surface.

21 citations


Journal ArticleDOI
TL;DR: The metal-insulator transition in compensated n-type indium phosphide, with an impurity concentration just above the critical concentration obtained from the Mott criterion has been induced by a magnetic field as mentioned in this paper.
Abstract: The metal-insulator transition in compensated n-type indium phosphide, with an impurity concentration just above the critical concentration obtained from the Mott criterion has been induced by a magnetic field. First-order phenomena are considered, corrections to the conductivity due to electron-electron interaction or quantum interferences in the metallic regime will be described elsewhere. Two aspects of the MI transition (Anderson and Mott transitions) are observed by increasing the magnetic field at temperatures down to 50 mK. The Mott minimum metallic conductivity, whose existence has been shown earlier at higher temperatures, is still found down to the lowest attainable temperatures, and its value remains in agreement with the first Mott estimation. For a sample near the MI transition, arguments are given for conduction mechanisms occurring in the impurity band rather than in a tail of the conduction band.

20 citations



Book ChapterDOI
01 Jan 1984
TL;DR: In this paper, the Mott-like transition of a strongly excited semiconductor crystal was studied from a fundamental point of view as well as for potential applications, e.g. in fast switching devices.
Abstract: It is well known that a strongly excited semiconductor crystal may become partly metallic, due to the formation in the medium of a dense plasma of free electron-hole pairs. This plasma phase represents the lowest electronically excited state of the crystal, as long as the free carriers density n exceeds a critical value nc. If n falls below nc, the excited system reverts to an insulating (excitonic) phase consisting of strongly correlated electron-hole pairs. The complete understanding of this Mott-like transition, particularly its dynamical aspect, is of great interest, both from a fundamental point of view as well as for potential applications, e.g. in fast switching devices.