124 research outputs found
Metal - non-metal transition and the second critical point in expanded metals
Based on the non-relativistic Coulomb model within which the matter is a
system of interacting electrons and nuclei, using the quantum field theory and
linear response theory methods, opportunity for the existence of the second
critical point in expanded metals, which is directly related to the
metal--nonmetal transition, predicted by Landau and Zeldovitch, is
theoretically justified. It is shown that the matter at the second critical
point is in the state of true dielectric with zero static conductivity. The
results obtained are in agreement with recent experiments for expanded metals.
The existence of the second critical point is caused by the initial
multi-component nature of the matter consisting of electrons and nuclei and the
long-range character of the Coulomb interaction. (Accepted in PTEP)Comment: 10 pages, Fig.4 (6
The statistical description of the electron system on the liquid helium surface
It is known that homogeneous distribution of particles in Coulomb-like
systems can be unstable, and spatially inhomogeneous structures can be formed.
A simple method for describing such inhomogeneous systems and obtaining spacial
distributions of electron density is proposed and applied to the case of
two-dimensional electron systems on surface of liquid helium. A free energy
functional for the model in mean field approximation is obtained. Creation of
various types of structures, such as long-range periodical modulation and
multi-electron dimples, is predicted by minimizing this functional
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