Spin diffusion in geometrically frustrated Heisenberg antiferromagnets

TL;DR

This paper studies how spin diffusion behaves in geometrically frustrated Heisenberg antiferromagnets, revealing temperature-dependent changes in the diffusion constant and detailed analysis for the pyrochlore lattice.

Contribution

It provides new insights into the temperature dependence of spin diffusion in frustrated antiferromagnets, especially for the pyrochlore lattice.

Findings

Diffusion constant increases as temperature approaches susceptibility peak.

Below the peak, susceptibility decrease causes rapid spin diffusion increase.

Detailed results for pyrochlore lattice with nearest-neighbor interactions.

Abstract

We investigate spin diffusion in geometrically frustrated Heisenberg antiferromagnets. It is found that the diffusion constant gradually increases from its high temperature limit as the temperature approaches the peak temperature of the susceptibility. Below the peak, the exponential decrease in the susceptibility leads to a rapid increase in the rate of spin diffusion. Detailed results are presented for the pyrochlore lattice with nearest-neighbor interactions.