Characterization of two electronic subsystems in cuprates through optical conductivity

Znanstveni rad - Izvorni znanstveni rad

• Autor: C. M. N. Kumar
• Autor: A. Akrap
• Autor: C. C. Homes
• Autor: E. Martino
• Autor: B. Klebel-Knobloch
• Autor: W. Tabis
• Autor: O. S. Barišić
• Autor: D. K. Sunko
• Autor: N. Barišić
• Autorova ustanova: Sveučilište u Zagrebu; Prirodoslovno-matematički fakultet; (Fizički odsjek)
• Znanstveno / umjetničko područje, polje i grana: PRIRODNE ZNANOSTI; Fizika

Sažetak (engleski)

Understanding the physical properties of unconventional superconductors as well as of other correlated materials presents a formidable challenge. Their unusual evolution with doping, frequency, and temperature has frequently led to non-Fermi-liquid (non-FL) interpretations. Optical conductivity is a major challenge in this context. Here, the optical spectra of two archetypal cuprates, underdoped HgBa2⁢CuO4+𝛿 and optimally doped Bi2⁢Sr2⁢CaCu2⁢O8+𝛿, are interpreted based on the standard Fermi-liquid (FL) paradigm. At both dopings, perfect frequency-temperature FL scaling is found to be modified by the presence of a second, gapped electronic subsystem. This non-FL component emerges as a well-defined mid-infrared spectral feature after the FL contribution, determined independently by transport, is subtracted. Temperature, frequency, and doping evolution of the MIR feature identify a gapped rather than dissipative response. In contrast, the dissipative response is found to be relevant for pnictides and ruthenates. Such an unbiased FL/non-FL separation is extended across the cuprate phase diagram, capturing all the key features of the normal state and providing a natural explanation why the superfluid density is attenuated on the overdoped side. Thus, we obtain a unified interpretation of optical responses and transport measurements in all analyzed physical regimes and all analyzed compounds.

• Ključne riječi (engleski): Optical conductivity; high-Tc superconductivity
• Jezik: engleski
• Vrsta publikacije: Znanstveni rad - Izvorni znanstveni rad
• Status objave: Objavljen
• Vrsta recenzije: Recenziran - međunarodna recenzija
• Verzija publikacije: Objavljena verzija rada (izdavačev PDF)
• Naslov časopisa: Physical Review B
• Brojčani podaci: vol. 107, br. 14, 144515
• p-ISSN: 2469-9950
• e-ISSN: 2469-9969
• DOI: https://doi.org/10.1103/PhysRevB.107.144515
• URN:NBN: urn:nbn:hr:217:251723
• Datum objave publikacije: 2023
• Projekt: Šifra: 725521; Naziv (hrvatski): The Janus-face of the localized carrier in cuprates: Generating the pseudogap and high temperature superconductivity; Naziv (engleski): The Janus-face of the localized carrier in cuprates: Generating the pseudogap and high temperature superconductivity; Kratica: TheONE; Pravna nadležnost: eu; Financijer: Europska komisija; Linija financiranja: European Research Council
• Projekt: Šifra: IP-2018-01-7828; Naziv (hrvatski): Sulfasoli: nova generacija kompleksnih funkcionalnih materijala; Naziv (engleski): Sulfosalts: new generation of complex fuctional materials; Kratica: SulfNewFunMat; Voditelj: Denis Sunko; Pravna nadležnost: Hrvatska; Financijer: Hrvatska zaklada za znanost; Linija financiranja: Research Projects
• Projekt: Šifra: KK.01.1.1.02.0013; Naziv (hrvatski): Centar za Napredna Istraživanja Kompleksnih Sustava; Naziv (engleski): Centre for Advanced Research of Complex Systems; Kratica: CeNIKS; Voditelj: Mihael Srđan Grbić; Pravna nadležnost: eu; Financijer: Europska komisija; Linija financiranja: European Regional Development Fund
• Projekt: Šifra: KK.01.1.1.01.0004; Naziv (hrvatski): Provedba vrhunskih istraživanja u sklopu Znanstvenog centra izvrsnosti za kvantne i kompleksne sustave te reprezentacije Liejevih algebri; Naziv (engleski): Implementation of top research within the Scientific Center of Excellence for Quantum and Complex Systems, and Representations of Lie Algebras; Kratica: QuantiXLie; Voditelj: Hrvoje Buljan; Pravna nadležnost: eu; Financijer: Europska komisija; Linija financiranja: European Regional Development Fund
• URL dokumenta: https://link.aps.org/doi/10.1103/PhysRevB.107.144515
• Vrsta resursa: Tekst
• Prava pristupa: Otvoreni pristup
• Javna napomena: © 2023 American Physical Society. Received 1 July 2022. Revised 7 April 2023. Accepted 12 April 2023. Published 27 April 2023.
• Datum i vrijeme pohrane: 2024-07-23 11:00:13