THE NONMETAL-METAL TRANSITION IN FLUIDS

A ug 2 00 7 Nature of the metal - nonmetal transition in metal - ammonia solutions . I .

Gennady N. Chuev, Pascal Quémerais, and Jason Crain (1) Institute of Theoretical and Experimental Biophysics, Russian Academy of Science, Pushchino, Moscow Region, 142290, Russia (2)Institut Néel, CNRS, BP 166, 38042 Grenoble Cedex 9, France (3) School of Physics, The University of Edinburgh, Mayfield Road, Edinburgh EH9 3JZ, United Kingdom (4) National Physical Laboratory, Hampton Road, Teddin...

Medium-range fluctuations accompanying the metal-nonmetal transition in expanded fluid hg.

We have carried out small angle x-ray scattering experiments of expanded fluid Hg in the metal-nonmetal (M-NM) transition region around 9.0 g cm(-3). Increase of small angle scattering intensity following the Ornstein-Zernike equation is clearly observed in the M-NM transition region as well as near the liquid-vapor critical point at 5.8 g cm(-3). The short-range correlation length, R, becomes ...

Correlation between screening and electron effective mass across the nonmetal-metal transition in ultrathin films.

Quantum molecular dynamics simulations for the nonmetal-to-metal transition in fluid helium.

We have performed quantum molecular dynamics simulations for dense helium to study the nonmetal-to-metal transition at high pressures. We present new results for the equation of state and the Hugoniot curve in the warm dense matter region. The optical conductivity is calculated via the Kubo-Greenwood formula from which the dc conductivity is derived. The nonmetal-to-metal transition is identifi...

1/f noise through the metal–nonmetal transition in percolating composites

We have measured the 1/f noise through the metal–nonmetal transition in carbon black/polymer composites as a function of temperature and doping. At the electronic transition, the resistivity power spectrum Sr varies as Sr;r , with Q52.77, in agreement with classical three-dimensional percolation. At lower temperatures, a crossover to tunneling-dominated transport occurs with Sr ;ln Sr /r . Our ...