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Title: Evidence of a first-order phase transition to metallic hydrogen

Abstract

The insulator-metal transition in hydrogen is one of the most outstanding problems in condensed matter physics. The highpressure metallic phase is now predicted to be liquid atomic from the low temperature limit with the system in the ground state, to very high temperatures. We have conducted measurements of optical properties of hot dense hydrogen in the region of 1.1-1.7 Mbar and up to 2200 K. We present evidence supportive of a first-order phase transition accompanied by changes in transmittance and reflectance, characteristic of a metal. In conclusion, the phase line of this transition has a negative slope in agreement with theories of the so-called plasma phase transition.

Authors:
 [1];  [1];  [1]
  1. Harvard Univ., Cambridge, MA (United States)
Publication Date:
Research Org.:
Harvard Univ., Cambridge, MA (United States); Univ. of Nevada, Las Vegas, NV (United States)
Sponsoring Org.:
USDOE National Nuclear Security Administration (NNSA), Office of Defense Programs (DP) (NA-10)
OSTI Identifier:
1439436
Alternate Identifier(s):
OSTI ID: 1247828
Grant/Contract Number:  
NA0001990; NA0001982
Resource Type:
Accepted Manuscript
Journal Name:
Physical Review B
Additional Journal Information:
Journal Volume: 93; Journal Issue: 15; Journal ID: ISSN 2469-9950
Publisher:
American Physical Society (APS)
Country of Publication:
United States
Language:
English
Subject:
08 HYDROGEN

Citation Formats

Zaghoo, Mohamed, Salamat, Ashkan, and Silvera, Isaac F. Evidence of a first-order phase transition to metallic hydrogen. United States: N. p., 2016. Web. doi:10.1103/PhysRevB.93.155128.
Zaghoo, Mohamed, Salamat, Ashkan, & Silvera, Isaac F. Evidence of a first-order phase transition to metallic hydrogen. United States. doi:10.1103/PhysRevB.93.155128.
Zaghoo, Mohamed, Salamat, Ashkan, and Silvera, Isaac F. Fri . "Evidence of a first-order phase transition to metallic hydrogen". United States. doi:10.1103/PhysRevB.93.155128. https://www.osti.gov/servlets/purl/1439436.
@article{osti_1439436,
title = {Evidence of a first-order phase transition to metallic hydrogen},
author = {Zaghoo, Mohamed and Salamat, Ashkan and Silvera, Isaac F.},
abstractNote = {The insulator-metal transition in hydrogen is one of the most outstanding problems in condensed matter physics. The highpressure metallic phase is now predicted to be liquid atomic from the low temperature limit with the system in the ground state, to very high temperatures. We have conducted measurements of optical properties of hot dense hydrogen in the region of 1.1-1.7 Mbar and up to 2200 K. We present evidence supportive of a first-order phase transition accompanied by changes in transmittance and reflectance, characteristic of a metal. In conclusion, the phase line of this transition has a negative slope in agreement with theories of the so-called plasma phase transition.},
doi = {10.1103/PhysRevB.93.155128},
journal = {Physical Review B},
number = 15,
volume = 93,
place = {United States},
year = {2016},
month = {4}
}

Journal Article:
Free Publicly Available Full Text
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Cited by: 25 works
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