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Title: Critical behavior in the hydrogen insulator-metal transition

Abstract

The vibrational Raman spectrum of solid hydrogen has been measured from 77 to 295 K in the vicinity of the recently observed insulator-metal transition and low-temperature phase transition at 150 gigapascals (1.5 megabars). The measurements provide evidence for a critical point in the pressure-temperature phase boundary of the low-temperature transition. The result suggests that below the critical temperature the insulator-metal transition changes from continuous to discontinuous, consistent with the general criteria originally proposed by Mott for metallization by band-gap closure. The effect of temperature on hydrogen metallization closely resembles that of the lower pressure insulator-metal transitions in doped V{sub 2}O{sub 3} alloys. 20 refs., 4 figs.

Authors:
;  [1]
  1. (Carnegie Institution of Washington, DC (USA))
Publication Date:
OSTI Identifier:
6302172
Resource Type:
Journal Article
Resource Relation:
Journal Name: Science (Washington, D.C.); (USA); Journal Volume: 249:4967
Country of Publication:
United States
Language:
English
Subject:
08 HYDROGEN; HYDROGEN; RAMAN SPECTRA; CRITICAL TEMPERATURE; EXPERIMENTAL DATA; SOLIDS; TEMPERATURE EFFECTS; DATA; ELEMENTS; INFORMATION; NONMETALS; NUMERICAL DATA; PHYSICAL PROPERTIES; SPECTRA; THERMODYNAMIC PROPERTIES; TRANSITION TEMPERATURE; 080800* - Hydrogen- Properties & Composition

Citation Formats

Hemley, R.J., and Mao, H.K. Critical behavior in the hydrogen insulator-metal transition. United States: N. p., 1990. Web. doi:10.1126/science.249.4967.391.
Hemley, R.J., & Mao, H.K. Critical behavior in the hydrogen insulator-metal transition. United States. doi:10.1126/science.249.4967.391.
Hemley, R.J., and Mao, H.K. Fri . "Critical behavior in the hydrogen insulator-metal transition". United States. doi:10.1126/science.249.4967.391.
@article{osti_6302172,
title = {Critical behavior in the hydrogen insulator-metal transition},
author = {Hemley, R.J. and Mao, H.K.},
abstractNote = {The vibrational Raman spectrum of solid hydrogen has been measured from 77 to 295 K in the vicinity of the recently observed insulator-metal transition and low-temperature phase transition at 150 gigapascals (1.5 megabars). The measurements provide evidence for a critical point in the pressure-temperature phase boundary of the low-temperature transition. The result suggests that below the critical temperature the insulator-metal transition changes from continuous to discontinuous, consistent with the general criteria originally proposed by Mott for metallization by band-gap closure. The effect of temperature on hydrogen metallization closely resembles that of the lower pressure insulator-metal transitions in doped V{sub 2}O{sub 3} alloys. 20 refs., 4 figs.},
doi = {10.1126/science.249.4967.391},
journal = {Science (Washington, D.C.); (USA)},
number = ,
volume = 249:4967,
place = {United States},
year = {Fri Jul 27 00:00:00 EDT 1990},
month = {Fri Jul 27 00:00:00 EDT 1990}
}