Kagom\'e in triangular lattice: electronic state of CoO_2 layer with hexagonal structure

TL;DR

This paper investigates the electronic properties of layered cobalt oxides with hexagonal structure, revealing how the hidden Kagomé lattice influences their transport and magnetic behaviors.

Contribution

It introduces a fundamental model linking the Kagomé lattice to the unique electronic, transport, and magnetic properties of cobalt oxides with hexagonal structure.

Findings

Electronic structure reflects the Kagomé lattice nature.

Proposed a fundamental model for the electron system.

Discussed mechanisms behind transport and magnetic properties.

Abstract

The electronic state in layered cobalt oxides with hexagonal structure is examined. We find that the electronic structure reflects the nature of the Kagom\'e lattice hidden in the CoO_2 layer which consists of stacked triangular lattices of oxygen ions and of cobalt ions. A fundamental model for the electron system is proposed and the mechanism of the unique transport and magnetic properties of the cobalt oxides are discussed in the light of the model.