Indications of incommensurate spin fluctuations in doped triangular antiferromagnets

TL;DR

This paper investigates incommensurate spin fluctuations in doped triangular antiferromagnets using the t-J model, revealing peak splitting, doping-dependent incommensurability, and energy-temperature effects on peak weight.

Contribution

It demonstrates the emergence and evolution of incommensurate spin peaks in doped triangular antiferromagnets within the t-J model, highlighting their doping and energy dependence.

Findings

Six incommensurate peaks appear in doped regimes.

Incommensurability increases with doping and saturates.

Peak weight decreases with energy and temperature.

Abstract

The incommensurate spin fluctuation of the doped triangular antiferromagnet is studied within the t-J model. It is shown that the commensurate peak near the half-filling is split into six incommensurate peaks in the underdoped and optimally doped regimes. The incommensurability increases with the hole concentration at lower dopings, and saturates at higher dopings. Although the incommensurability is almost energy independent, the weight of these incommensurate peaks decreases with energy and temperature.