High-T_c Cuprates: a Story of Two Electronic Subsystems

Scientific paper - Original scientific paper

• Author: Neven Barišić
• Author: Denis K. Sunko
• Author's institution: University of Zagreb; Faculty of Science; (Department of Physics)
• Scientific / art field, discipline and subdiscipline: NATURAL SCIENCES; Physics

Abstract (english)

A review of the phenomenology and microscopy of cuprate superconductors is presented, with particular attention to universal conductance features, which reveal the existence of two electronic subsystems. The overall electronic system consists of 1 + p charges, where p is the doping. At low dopings, exactly one hole is localized per planar copper–oxygen unit, while upon increasing doping and temperature, the hole is gradually delocalized and becomes itinerant. Remarkably, the itinerant holes exhibit identical Fermi liquid character across the cuprate phase diagram. This universality enables a simple count of carrier density and yields comprehensive understanding of the key features in the normal and superconducting state. A possible superconducting mechanism is presented, compatible with the key experimental facts. The base of this mechanism is the interaction of fast Fermi liquid carriers with localized holes. A change in the microscopic nature of chemical bonding in the copper oxide planes, from ionic to covalent, is invoked to explain the phase diagram of these fascinating compounds.

• Keywords (english): cuprate superconductors
• Language: english
• Publication type: Scientific paper - Original scientific paper
• Publication status: Published
• Peer review: Peer review - international
• Publication version: Published version
• Journal title: Journal of Superconductivity and Novel Magnetism
• Numbering: vol. 35, no. 7, pp. 1781-1799
• p-ISSN: 1557-1939
• e-ISSN: 1557-1947
• DOI: https://doi.org/10.1007/s10948-022-06183-y
• URN:NBN: urn:nbn:hr:217:083461
• Publication: 2022-03-18
• Project: Number: 725521; Title (croatian): The Janus-face of the localized carrier in cuprates: Generating the pseudogap and high temperature superconductivity; Title (english): The Janus-face of the localized carrier in cuprates: Generating the pseudogap and high temperature superconductivity; Acronym: TheONE; Jurisdiction: eu; Funding stream: European Research Council
• Project: Number: KK.01.1.1.02.0013; Title (croatian): Centar za Napredna Istraživanja Kompleksnih Sustava; Title (english): Centre for Advanced Research of Complex Systems; Acronym: CeNIKS; Leader: Mihael Srđan Grbić; Jurisdiction: eu; Funding stream: European Regional Development Fund
• Project: Number: IP-2018-01-7828; Title (croatian): Sulfasoli: nova generacija kompleksnih funkcionalnih materijala; Title (english): Sulfosalts: new generation of complex fuctional materials; Acronym: SulfNewFunMat; Leader: Denis Sunko; Jurisdiction: Croatia; Funding stream: Research Projects
• Document URL: https://link.springer.com/10.1007/s10948-022-06183-y
• Type of resource: Text
• Access conditions: Open access
• Public note: © The Author(s) 2022. This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http:// creativecommons.org/licenses/by/4.0/. Received: 10 January 2022; Accepted: 12 February 2022; Published online: 18 March 2022.
• Created on: 2024-08-29 11:40:33