Specific heat of the S=1/2 Heisenberg model on the kagome lattice: high-temperature series expansion analysis

TL;DR

This paper analyzes the specific heat of the spin-1/2 Heisenberg model on the kagome lattice using a novel high-temperature series expansion method, predicting a low-temperature peak around T/J<0.1.

Contribution

It introduces a new technique combining high-temperature series, entropy, and ground-state energy to analyze specific heat in frustrated quantum magnets.

Findings

Predicts a low-temperature peak in specific heat at T/J<0.1

Provides insights into low-temperature thermodynamics of kagome antiferromagnets

Enhances understanding of quantum spin liquids on frustrated lattices

Abstract

We compute specific heat of the antiferromagnetic spin-1/2 Heisenberg model on the kagome lattice. We use a recently introduced technique to analyze high-temperature series expansion based on the knowledge of high-temperature series expansions, the total entropy of the system and the low-temperature expected behavior of the specific heat as well as the ground-state energy. In the case of kagome-lattice antiferromagnet, this method predicts a low-temperature peak at T/J<0.1.