Issues

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1999

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November

  

Reviews of topical problems


Hydrogen at high pressure

 a,  b
a Lebedev Physical Institute, Russian Academy of Sciences, Leninsky prosp. 53, Moscow, 119991, Russian Federation
b All-Russian Scientific Research Institute of Experimental Physics — Federal Nuclear Centre, prosp. Mira 37, Sarov, Nizhny Novgorod region, 607190, Russian Federation

Experimental and theoretical work on solid hydrogen under high pressure is reviewed with special emphasis on three aspects of the field. The first concerns the equation of state of hydrogen and the properties of its molecular phase. Both experimental and theoretical studies show that hydrogen has a rich variety of unusual properties even in its molecular phase, as the formation of many highly anisotropic crystal structures with little energy difference exemplifies. The second aspect is the insulator-metal transition which, while customarily associated with atomization, i.e., with the dissociation of hydrogen molecules, is also possible in the molecular phase according to recent theoretical studies. In discussing the metallic phase, finally, the existence of a metastable phase at normal pressure and prospects for the high superconducting transition temperatures in metallic hydrogen are considered.

Text can be downloaded in Russian. English translation is available on IOP Science.
PACS: 64.30.+t, 71.20.−b, 71.30.+h, 74.25.−q (all)
DOI: 10.1070/PU1999v042n11ABEH000666
URL: https://ufn.ru/en/articles/1999/11/c/
Citation: Maksimov E G, Shilov Yu I "Hydrogen at high pressure" Phys. Usp. 42 1121–1138 (1999)
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Оригинал: Максимов Е Г, Шилов Ю И «Водород при высоких давлениях» УФН 169 1223–1242 (1999); DOI: 10.3367/UFNr.0169.199911c.1223

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