Electronic diffusion in a normal state of high-Tc cuprate YBa$_2$Cu$_3$O$_{6+x}$

Kokalj, Jure (avtor)

The bad metallic phase with resistivity above the Mott–Ioffe–Regel (MIR) limit, which appears also in cuprate superconductors, was recently understood by cold atom and computer simulations of the Hubbard model via charge susceptibility and charge diffusion constant. However, since reliable simulations can be typically done only at temperatures above the experimental temperatures, the question for cuprate superconductors is still open. This paper addresses this question by resorting to heat transport, which allows for the estimate of electronic diffusion and it further combines it with the resistivity to estimate the charge susceptibility. The doping and temperature dependencies of diffusion constant and charge susceptibilities are shown and discussed for two samples of YBa$_2$Cu$_3$O$_{6+x}$. Results indicate strongly incoherent transport, mean free path corresponding to the MIR limit for the underdoped sample at temperatures above ~200 K and significant effect of the charge susceptibility on the resistivity.

• Jezik: Angleški jezik
• Ključne besede: Hubbard model, diffusion, superconductors, superconducting cuprates, electronic transport, heat conductivity
• Vrsta gradiva: Članek v reviji
• Tipologija: 1.01 - Izvirni znanstveni članek
• Organizacija: FGG - Fakulteta za gradbeništvo in geodezijo
• Status publikacije: Objavljeno
• Različica publikacije: Objavljena publikacija
• Leto izida: 2024
• Št. strani: 3 str.
• Številčenje: Vol. 121, no. 12, art. e2322670121
• PID: 20.500.12556/RUL-164644
• UDK: 53
• ISSN pri članku: 1091-6490
• DOI: 10.1073/pnas.2322670121
• COBISS.SI-ID: 188945923
• Datum objave v RUL: 06.11.2024

Gradivo je del revije

• Naslov: Proceedings of the National Academy of Sciences of the United States of America
• Skrajšan naslov: Proc. Natl. Acad. USA
• Založnik: National Academy of Sciences
• ISSN: 1091-6490
• COBISS.SI-ID: 2318612

Licence

• Licenca: CC BY 4.0, Creative Commons Priznanje avtorstva 4.0 Mednarodna
• Povezava: http://creativecommons.org/licenses/by/4.0/deed.sl
• Opis: To je standardna licenca Creative Commons, ki daje uporabnikom največ možnosti za nadaljnjo uporabo dela, pri čemer morajo navesti avtorja.

Sekundarni jezik

• Jezik: Slovenski jezik
• Ključne besede: superprevodniki, Hubbardov model, limita Mott–Ioffe–Regel, difuzije

Projekti

• Financer: ARIS - Javna agencija za znanstvenoraziskovalno in inovacijsko dejavnost Republike Slovenije
• Številka projekta: P1-0044
• Naslov: Teorija trdnih snovi in statistična fizika