Superconducting properties of the hole-doped three-band dp model studied with minimal-size real-space d-wave pairing operators

A. Biborski, M. Zegrodnik, and J. Spałek
Phys. Rev. B 101, 214504 – Published 4 June 2020

Abstract

The three-band d-p model is investigated by means of a variational Monte Carlo (VMC) method with the BCS-like wave-function supplemented by the Gutzwiller and Jastrow correlators. The VMC optimization leads to a dwave superconducting state with a characteristic domelike shape of the order parameter for hole doping δ0.4, in good agreement with the experimental observations. Also, the off-diagonal pair-pair correlation functions, calculated within VMC, vindicates the results obtained very recently within the diagrammatic expansion of the Gutzwiller wave function method [cf. Zegrodnik, Biborski, Fidrysiak, and Spałek, Phys. Rev. B 99, 104511 (2019)]. Subsequently, the nature of the dwave pairing is investigated by means of recently proposed minimal-size real-space d-wave pairing operators [Moreo and Dagotto, Phys. Rev. B 100, 214502 (2019)]. An emergence of the long-range superconducting ordering for both d and p orbitals is reported by analyzing the corresponding off-diagonal pair-pair correlation functions. The dominant character of d-wave pairing on d orbitals is confirmed. Additionally, the trial wave function is used to investigate the magnetic properties of the system. The analysis of spin-spin correlation functions is carried out and shows antiferromagnetic q=(π,π), short-range order, as expected. For the sake of completeness, the charge gap has been estimated, which for the parent compound takes the value ΔCG1.78±0.51eV, and agrees with values reported experimentally for the cuprates.

  • Figure
  • Figure
  • Figure
  • Figure
  • Figure
  • Figure
  • Figure
6 More
  • Received 13 March 2020
  • Revised 30 April 2020
  • Accepted 26 May 2020

DOI:https://doi.org/10.1103/PhysRevB.101.214504

©2020 American Physical Society

Physics Subject Headings (PhySH)

Condensed Matter, Materials & Applied Physics

Authors & Affiliations

A. Biborski1,*, M. Zegrodnik1,†, and J. Spałek2,‡

  • 1Academic Centre for Materials and Nanotechnology, AGH University of Science and Technology, Al. Mickiewicza 30, 30-059 Krakow, Poland
  • 2Institute of Theoretical Physics, Jagiellonian University, ul. Łojasiewicza 11, 30-348 Krakow, Poland

  • *andrzej.biborski@agh.edu.pl
  • michal.zegrodnik@agh.edu.pl
  • jozef.spalek@uj.edu.pl

Article Text (Subscription Required)

Click to Expand

References (Subscription Required)

Click to Expand
Issue

Vol. 101, Iss. 21 — 1 June 2020

Reuse & Permissions
Access Options
Author publication services for translation and copyediting assistance advertisement

Authorization Required


×
×

Images

×

Sign up to receive regular email alerts from Physical Review B

Log In

Cancel
×

Search


Article Lookup

Paste a citation or DOI

Enter a citation
×