https://doi.org/10.1140/epjp/s13360-023-04047-5
Regular Article
Spin-orbital correlations in the two-orbital Hubbard model
1
Dipartimento di Fisica “E.R. Caianiello”, Università degli Studi di Salerno, 84084, Fisciano, SA, Italy
2
CNR-SPIN, UOS di Salerno, 84084, Fisciano, SA, Italy
Received:
14
November
2022
Accepted:
2
May
2023
Published online:
31
May
2023
We use exact diagonalization results to investigate how the ground state of a two-site, two-orbital Hubbard model evolves in terms of the crystal field energy and a magnetic spin symmetry breaking field. We show that, based on the behavior of a properly defined composite spin-orbital correlation function, the different regions of the related phase diagrams can be classified according to the extent to which spin and orbital degrees of freedom turn out to be correlated.
Alfonso Romano, Delia Guerra, Filomena Forte and Canio Noce have contributed equally to this work.
© The Author(s) 2023
Open Access 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/.
