Abstract / Description of output
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. 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.
Original language | English |
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Article number | 255501 |
Number of pages | 19 |
Journal | Physical Review Letters |
Volume | 116 |
Issue number | 25 |
Early online date | 22 Jun 2016 |
DOIs | |
Publication status | Published - 24 Jun 2016 |
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Dive into the research topics of 'Optical properties of fluid hydrogen at the transition to a conducting state'. Together they form a unique fingerprint.Profiles
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Stewart Mcwilliams
- School of Physics and Astronomy - Personal Chair of Mineral Physics
Person: Academic: Research Active