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Nuclear magnetic resonance spectroscopy as a dynamical structural probe of hydrogen under high pressure

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Author(s)

Bartomeu Monserrat, Sharon E. Ashbrook, Chris Pickard

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Abstract


An unambiguous crystallographic structure solution for the observed phases II-VI of high pressure hydrogen does not exist due to the failure of standard structural probes at extreme pressure. In this work we propose that nuclear magnetic resonance spectroscopy provides a complementary structural probe for high pressure hydrogen. We show that the best structural models available for phases II, III, and IV of high pressure hydrogen exhibit markedly distinct nuclear magnetic resonance spec- tra which could therefore be used to discriminate amongst them. As an example, we demonstrate how nuclear magnetic resonance spectroscopy could be used to establish whether phase III exhibits polymorphism. Our calculations also reveal a strong renormalisation of the nuclear magnetic res- onance response in hydrogen arising from quantum fluctuations, as well as a strong isotope effect. As the experimental techniques develop, nuclear magnetic resonance spectroscopy can be expected to become a useful complementary structural probe in high pressure experiments.
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Details

Original languageEnglish
Article number135501
JournalPhysical Review Letters
Volume122
Issue number13
DOIs
Publication statusPublished - 1 Apr 2019

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