Please use this identifier to cite or link to this item: http://hdl.handle.net/10995/101709
Title: Classifying hydrogen-rich superconductors
Authors: Talantsev, E. F.
Issue Date: 2019
Publisher: Institute of Physics Publishing
Citation: Talantsev E. F. Classifying hydrogen-rich superconductors / E. F. Talantsev. — DOI 10.1088/2053-1591/ab3bbb // Materials Research Express. — 2019. — Vol. 6. — Iss. 10. — 106002.
Abstract: The era of near-room-temperature superconductivity started after experimental discovery by Drozdov et al (2015 Nature 525 73) who found that compressed H3S exhibits superconducting transition at T c = 203 K. To date, the record near-room-temperature superconductivity stands with another hydrogen-rich highly compressed compound, LaH10 (Somayazulu et al 2019 Phys. Rev. Lett. 122 027001), which has critical temperature of In this paper, we analyse available upper critical field, B c2(T), data for LaH10 (Drozdov et al 2019 Nature 569 528) and report that this compound in all considered scenarios has the ratio of T c to the Fermi temperature, T F, 0.009 < T c/T F < 0.038, which is typical range for unconventional superconductors. In attempt to extend our finding, we examined experimental B c2(T) data for superconductors in the palladium-hydrogen system and surprisingly find that PdHx compounds have the ratio of 0.008 < T c/T F < 0.012. Taking in account that H3S has the ratio of 0.012 < T c/T F < 0.039 (Talantsev 2019 Modern Phys. Lett. B 33 1950195) we come to conclusion that in the Uemura plot all discovered to date hydrogen-rich superconductors, i.e. PdHx, H3S and LaH10, lie in same band as all unconventional superconductors, particularly heavy fermions, fullerenes, pnictides, and cuprates, and former should be classified as a new class of unconventional superconductors. © 2019 IOP Publishing Ltd.
Keywords: HYDROGEN-RICH SUPERCONDUCTING COMPOUNDS
LANTHANUM DECAHYDRIDE
UNCONVENTIONAL SUPERCONDUCTIVITY
UPPER CRITICAL FIELD
COPPER COMPOUNDS
HEAVY FERMION SUPERCONDUCTORS
PALLADIUM COMPOUNDS
CRITICAL TEMPERATURES
FERMI TEMPERATURE
NEAR ROOM TEMPERATURE
SUPERCONDUCTING COMPOUNDS
SUPERCONDUCTING TRANSITIONS
UNCONVENTIONAL SUPERCONDUCTIVITY
UNCONVENTIONAL SUPERCONDUCTORS
UPPER CRITICAL FIELDS
LANTHANUM COMPOUNDS
URI: http://hdl.handle.net/10995/101709
Access: info:eu-repo/semantics/openAccess
SCOPUS ID: 85071670041
PURE ID: 10774560
32464cd5-e403-4d18-93cc-307178775471
ISSN: 20531591
DOI: 10.1088/2053-1591/ab3bbb
Appears in Collections:Научные публикации, проиндексированные в SCOPUS и WoS CC

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