Enhancement of superconducting correlations by spin ordering in the spin-one-half Falicov-Kimball model with Hund and Hubbard coupling: Quantum Monte-Carlo study

Pavol Farkašovský ()
Additional contact information
Pavol Farkašovský: Institute of Experimental Physics, Slovak Academy of Sciences Watsonova 47

The European Physical Journal B: Condensed Matter and Complex Systems, 2020, vol. 93, issue 12, 1-5

Abstract: Abstract Projector Quantum-Monte-Carlo method is used to examine effects of spin ordering on superconducting correlations in the two dimensional spin-one-half Falicov-Kimball model with Hund and Hubbard coupling. At first, the ground state spin configurations of the model are determined for a wide range of model parameters like the d-electron filling Nd, the Hund coupling Jz, the Hubbard coupling U, and then the average vertex correlation functions, as a measure of the superconducting correlations in these ground states, are calculated. It is found that the presence of the fully or partially developed antiferromagnetic spin ordering in the ground state dramatically enhances superconducting correlations in the d-wave channel, while the ferromagnetic spin substructures in the form of parallel/antiparallel domains, bands or lines superconducting correlations strongly suppress. Graphical abstract

Keywords: Solid; State; and; Materials (search for similar items in EconPapers)
Date: 2020
References: Add references at CitEc
Citations:

Downloads: (external link)
http://link.springer.com/10.1140/epjb/e2020-10250-y Abstract (text/html)
Access to the full text of the articles in this series is restricted.

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:spr:eurphb:v:93:y:2020:i:12:d:10.1140_epjb_e2020-10250-y

Ordering information: This journal article can be ordered from
http://www.springer.com/economics/journal/10051

DOI: 10.1140/epjb/e2020-10250-y

Access Statistics for this article

The European Physical Journal B: Condensed Matter and Complex Systems is currently edited by P. Hänggi and Angel Rubio

More articles in The European Physical Journal B: Condensed Matter and Complex Systems from Springer, EDP Sciences
Bibliographic data for series maintained by Sonal Shukla () and Springer Nature Abstracting and Indexing ().