Isotope Quantum Effects in the Metallization Transition in Liquid Hydrogen
Quantum effects in condensed matter normally only occur at low temperatures. Here we show a large quantum effect in high-pressure liquid hydrogen at thousands of Kelvins. We show that the metallization transition in hydrogen is subject to a very large isotope effect, occurring hundreds of degrees lo...
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| Veröffentlicht in: | Physical review letters 2021-06, Vol.126 (22), p.1-225701, Article 225701 |
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| container_title | Physical review letters |
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| creator | van de Bund, Sebastiaan Wiebe, Heather Ackland, Graeme J. |
| description | Quantum effects in condensed matter normally only occur at low temperatures. Here we show a large quantum effect in high-pressure liquid hydrogen at thousands of Kelvins. We show that the metallization transition in hydrogen is subject to a very large isotope effect, occurring hundreds of degrees lower than the equivalent transition in deuterium. We examined this using path integral molecular dynamics simulations which identify a liquid-liquid transition involving atomization, metallization, and changes in viscosity, specific heat, and compressibility. The difference between H2 and D2 is a quantum mechanical effect that can be associated with the larger zero-point energy in H2 weakening the covalent bond. Our results mean that experimental results on deuterium must be corrected before they are relevant to understanding hydrogen at planetary conditions. |
| doi_str_mv | 10.1103/PhysRevLett.126.225701 |
| format | Article |
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Here we show a large quantum effect in high-pressure liquid hydrogen at thousands of Kelvins. We show that the metallization transition in hydrogen is subject to a very large isotope effect, occurring hundreds of degrees lower than the equivalent transition in deuterium. We examined this using path integral molecular dynamics simulations which identify a liquid-liquid transition involving atomization, metallization, and changes in viscosity, specific heat, and compressibility. The difference between H2 and D2 is a quantum mechanical effect that can be associated with the larger zero-point energy in H2 weakening the covalent bond. 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| ispartof | Physical review letters, 2021-06, Vol.126 (22), p.1-225701, Article 225701 |
| issn | 0031-9007 1079-7114 |
| language | eng |
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| source | American Physical Society Journals; Elektronische Zeitschriftenbibliothek - Frei zugängliche E-Journals |
| subjects | Astrochemistry Atomizing Compressibility Condensed matter physics Covalent bonds Deuterium Hydrogen Isotope effect Liquid hydrogen Low temperature Metallizing Molecular dynamics Pressure effects Quantum mechanics Zero point energy |
| title | Isotope Quantum Effects in the Metallization Transition in Liquid Hydrogen |
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