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Title: Optical Properties of Fluid Hydrogen at the Transition to a Conducting State

Journal Article · · Physical Review Letters
 [1];  [2];  [3];  [4]
  1. Carnegie Inst. of Washington, Washington D.C. (United States); Univ. of Edingburgh (United Kingdom); Howard Univ., Washington D.C. (United States)
  2. Carnegie Inst. of Washington, Washington D.C. (United States)
  3. Carnegie Inst. of Washington, Washington D.C. (United States); Howard Univ., Washington D.C. (United States)
  4. Carnegie Inst. of Washington, Washington D.C. (United States); Chinese Academy of Science, Hefei (China); Univ. of Science and Technology of China, Hefei (China)

We use fast transient transmission and emission spectroscopies in the pulse laser heated diamond anvil cell to probe the energy-dependent optical properties of hydrogen at pressures of 10–150 GPa and temperatures up to 6000 K. Hydrogen is absorptive at visible to near-infrared wavelengths above a threshold temperature that decreases from 3000 K at 18 GPa to 1700 K at 110 GPa. Finally, transmission spectra at 2400 K and 141 GPa indicate that the absorptive hydrogen is semiconducting or semimetallic in character, definitively ruling out a first-order insulator-metal transition in the studied pressure range.

Research Organization:
Energy Frontier Research Centers (EFRC) (United States). Energy Frontier Research in Extreme Environments (EFree)
Sponsoring Organization:
USDOE National Nuclear Security Administration (NNSA); National Science Foundation (NSF); US Army Research Office (ARO); National Natural Science Foundation of China (NSFC)
Grant/Contract Number:
FC52-08NA28554; SC0001057; NSF EAR-1015239; NSF EAR-1520648; NSF EAR/IF-1128867; 56122-CH-H
OSTI ID:
1387997
Alternate ID(s):
OSTI ID: 1258704
Journal Information:
Physical Review Letters, Vol. 116, Issue 25; Related Information: EFree partners with Carnegie Institution of Washington (lead); California Institute of Technology; Colorado School of Mines; Cornell University; Lehigh University; Pennsylvania State University; ISSN 0031-9007
Publisher:
American Physical Society (APS)Copyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 57 works
Citation information provided by
Web of Science

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Cited By (18)

A Spectroscopic Study of the Insulator–Metal Transition in Liquid Hydrogen and Deuterium journal November 2019
Plasma phase transition in warm dense hydrogen journal February 2018
Plasma phase transition (by the fiftieth anniversary of the prediction) journal March 2019
Metallization and molecular dissociation of dense fluid nitrogen journal July 2018
Finite element modeling of melting and fluid flow in the laser-heated diamond-anvil cell journal April 2017
Combination of pulsed light heating thermoreflectance and laser-heated diamond anvil cell for in-situ high pressure-temperature thermal diffusivity measurements journal July 2019
Optical properties of high-pressure fluid hydrogen across molecular dissociation journal April 2019
Comment on “Evidence of a first-order phase transition to metallic hydrogen” journal October 2017
Accelerating ab initio Molecular Dynamics and Probing the Weak Dispersive Forces in Dense Liquid Hydrogen journal January 2017
Melting and High P T Transitions of Hydrogen up to 300 GPa journal August 2017
Phase Diagram of Hydrogen and a Hydrogen-Helium Mixture at Planetary Conditions by Quantum Monte Carlo Simulations journal January 2018
Solids, liquids, and gases under high pressure journal March 2018
Insulator-metal transition in dense fluid deuterium journal August 2018
Phase Diagram of Hydrogen and a Hydrogen-Helium Mixture at Planetary Conditions by Quantum Monte Carlo Simulations text January 2018
Phase diagram of hydrogen and a hydrogen-helium mixture at planetary conditions by Quantum Monte Carlo simulations text January 2017
Accelerated ab-initio Molecular Dynamics: probing the weak dispersive forces in dense liquid hydrogen text January 2016
Metallization and molecular dissociation of dense fluid nitrogen text January 2017
Optical properties of high pressure liquid hydrogen across molecular dissociation text January 2018