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Title: Instability of the Electron Gas in an Expanding Metal

Abstract

We have measured x-ray diffraction and small-angle x-ray scattering of fluid rubidium by reducing electron density down to the range where the compressibility of the interacting electron gas has been theoretically predicted to become negative. Negative compressibility is closely associated with a negative value of the static dielectric function, which makes the screened Coulomb interaction among like charges overall attractive. It was clearly observed that the interatomic distance decreases in spite of the fact that mean interatomic distance increases with expansion, suggesting that an attractive interaction among like charges, ions in this case, is enhanced. These findings indicate that the observed structural features are evidence of the compressional instability of the 3D electron gas.

Authors:
;  [1];  [2]
  1. Department of Materials Science and Engineering, Kyoto University, Kyoto 606-8501 (Japan)
  2. Faculty of Integrated Arts and Sciences, Hiroshima University, Higashi Hiroshima 739-8521 (Japan)
Publication Date:
OSTI Identifier:
20957709
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physical Review Letters; Journal Volume: 98; Journal Issue: 9; Other Information: DOI: 10.1103/PhysRevLett.98.096401; (c) 2007 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; COMPRESSIBILITY; DIELECTRIC MATERIALS; ELECTRON DENSITY; ELECTRON GAS; EXPANSION; INSTABILITY; INTERATOMIC DISTANCES; RUBIDIUM; SMALL ANGLE SCATTERING; X-RAY DIFFRACTION

Citation Formats

Matsuda, K., Tamura, K., and Inui, M. Instability of the Electron Gas in an Expanding Metal. United States: N. p., 2007. Web. doi:10.1103/PHYSREVLETT.98.096401.
Matsuda, K., Tamura, K., & Inui, M. Instability of the Electron Gas in an Expanding Metal. United States. doi:10.1103/PHYSREVLETT.98.096401.
Matsuda, K., Tamura, K., and Inui, M. Fri . "Instability of the Electron Gas in an Expanding Metal". United States. doi:10.1103/PHYSREVLETT.98.096401.
@article{osti_20957709,
title = {Instability of the Electron Gas in an Expanding Metal},
author = {Matsuda, K. and Tamura, K. and Inui, M.},
abstractNote = {We have measured x-ray diffraction and small-angle x-ray scattering of fluid rubidium by reducing electron density down to the range where the compressibility of the interacting electron gas has been theoretically predicted to become negative. Negative compressibility is closely associated with a negative value of the static dielectric function, which makes the screened Coulomb interaction among like charges overall attractive. It was clearly observed that the interatomic distance decreases in spite of the fact that mean interatomic distance increases with expansion, suggesting that an attractive interaction among like charges, ions in this case, is enhanced. These findings indicate that the observed structural features are evidence of the compressional instability of the 3D electron gas.},
doi = {10.1103/PHYSREVLETT.98.096401},
journal = {Physical Review Letters},
number = 9,
volume = 98,
place = {United States},
year = {Fri Mar 02 00:00:00 EST 2007},
month = {Fri Mar 02 00:00:00 EST 2007}
}