Please use this identifier to cite or link to this item: http://hdl.handle.net/10995/112135
Title: Classifying Charge Carrier Interaction in Highly Compressed Elements and Silane
Authors: Talantsev, E. F.
Issue Date: 2021
Publisher: MDPI AG
MDPI AG
Citation: Talantsev E. F. Classifying Charge Carrier Interaction in Highly Compressed Elements and Silane / E. F. Talantsev // Materials. — 2021. — Vol. 14. — Iss. 15. — 4322.
Abstract: Since the pivotal experimental discovery of near-room-temperature superconductivity (NRTS) in highly compressed sulphur hydride by Drozdov et al. (Nature 2015, 525, 73–76), more than a dozen binary and ternary hydrogen-rich phases exhibiting superconducting transitions above 100 K have been discovered to date. There is a widely accepted theoretical point of view that the primary mechanism governing the emergence of superconductivity in hydrogen-rich phases is the electron–phonon pairing. However, the recent analysis of experimental temperature-dependent resistance, R(T), in H3S, LaHx, PrH9 and BaH12 (Talantsev, Supercond. Sci. Technol. 2021, 34, accepted) showed that these compounds exhibit the dominance of non-electron–phonon charge carrier interactions and, thus, it is unlikely that the electron–phonon pairing is the primary mechanism for the emergence of superconductivity in these materials. Here, we use the same approach to reveal the charge carrier interaction in highly compressed lithium, black phosphorous, sulfur, and silane. We found that all these superconductors exhibit the dominance of non-electron–phonon charge carrier interaction. This explains the failure to demonstrate the high-Tc values that are predicted for these materials by first-principles calculations which utilize the electron–phonon pairing as the mechanism for the emergence of their superconductivity. Our result implies that alternative pairing mechanisms (primarily the electron–electron retraction) should be tested within the first-principles calculations approach as possible mechanisms for the emergence of superconductivity in highly compressed lithium, black phosphorous, sulfur, and silane. © 2021 by the author. Licensee MDPI, Basel, Switzerland.
Keywords: CHARGE CARRIER INTERACTION IN SUPERCONDUCTORS
NON-ELECTRON–PHONON MEDIATED SUPERCONDUCTIVITY
SUPERCONDUCTIVITY INDUCED BY HIGH-PRESSURE
BARIUM COMPOUNDS
CALCULATIONS
CHARGE CARRIERS
HYDROGEN
LANTHANUM COMPOUNDS
LITHIUM
PHONONS
PHOSPHORUS
PRASEODYMIUM COMPOUNDS
SILANES
CARRIER INTERACTIONS
FIRST-PRINCIPLES CALCULATION
NEAR ROOM TEMPERATURE
PAIRING MECHANISM
POSSIBLE MECHANISMS
SUPERCONDUCTING TRANSITIONS
TEMPERATURE-DEPENDENT RESISTANCE
THEORETICAL POINTS
ELECTRONS
URI: http://hdl.handle.net/10995/112135
Access: info:eu-repo/semantics/openAccess
SCOPUS ID: 85112652202
PURE ID: 22981167
ISSN: 1996-1944
metadata.dc.description.sponsorship: Funding: This research was funded by the Ministry of Science, Higher Education of Russia (theme “Pressure” No. AAAA-A18-118020190104-3), and by Government Act 211 of the Russian Federation, contract No. 02.A03.21.0006.
Appears in Collections:Научные публикации, проиндексированные в SCOPUS и WoS CC

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