Magnetization Process of Kagome-Lattice Heisenberg Antiferromagnet

TL;DR

This paper investigates the magnetization process of the kagome-lattice Heisenberg antiferromagnet, revealing a novel 'magnetization ramp' phenomenon through numerical analysis of the derivative of magnetization.

Contribution

It introduces the concept of a 'magnetization ramp' as a new feature in the magnetization process of kagome antiferromagnets, based on reexamined numerical data.

Findings

Identification of a 'magnetization ramp' near one-third saturation

Distinct behavior of the magnetization derivative compared to typical plateaux

Reexamination of numerical data offers new insights into kagome antiferromagnetism

Abstract

The magnetization process of the isotropic Heisenberg antiferromagnet on the kagome lattice is studied. Data obtained from the numerical-diagonalization method are reexamined from the viewpoint of the derivative of the magnetization with respect to the magnetic field. We find that the behavior of the derivative at approximately one-third of the height of the magnetization saturation is markedly different from that for the cases of typical magnetization plateaux. The magnetization process of the kagome-lattice antiferromagnet reveals a new phenomenon, which we call the "magnetization ramp".