RKKY plateau in zero- and one-dimensional triangular Kagome lattice models

TL;DR

This paper investigates electronic properties and magnetic interactions in zero- and one-dimensional triangular Kagome lattice models, revealing novel RKKY plateaus and flat bands that could impact spintronics and electronic device design.

Contribution

It introduces the first observation of RKKY plateaus in TKL models and analyzes how magnetic impurity configurations affect these phenomena.

Findings

Presence of flat bands in TKL structures.

Emergence of RKKY plateaus versus Fermi energy.

Magnetic impurity configurations influence RKKY behavior.

Abstract

Motivated by the research interests on realizing flat bands and magnetization plateaus in kagome lattices, we study the electronic properties and magnetic interactions in both zero- and one-dimensional triangular Kagome lattice (1D-TKL) models, by using the real-space Greens function approach in tight-binding model. We firstly study the electronic properties of both 0D and 1D-TKL in the presence of staggered sublattice potential, then, by analyzing the Ruderman-Kittel-Kasuya-Yoshida (RKKY) interaction in these lattice structures, the magnetic ground states of both 0D and 1D-TKL in the presence of two magnetic adatoms are evaluated. It is found that the 1D channels of TKL show different electronic and magnetic behaviors due to different values of the hopping integrals and spin-orbit couplings. Two important salient features of these TKLs are the presence of flat bands in their band structure as well as the emergence of the RKKY plateaus versus the Fermi energy. These RKKY plateaus have not been reported before, to the best of our knowledge. The most remarkable observation is the potential and Fermi energy variation of the width and location of the RKKY plateaus in both 0D and 1D TKLs. The spatial configurations of the magnetic impurities can also dramatically change the quality and quantity of the RKKY plateaus. We believe that our results provide significant insights towards designing further experiments to search for the realizing of the flat bands and magnetization plateau phases in spintronics and pseudospin electronics devices based on TKLs.