Polarization Plateau in Atomic Fermi Gas Loaded on Triangular Optical Lattice

TL;DR

This study numerically investigates atomic Fermi gases on triangular optical lattices, revealing polarization plateaus in Mott core states caused by population imbalance and unique spin patterns, demonstrating their potential for studying frustrated spin systems.

Contribution

The paper introduces the observation of polarization plateaus in Mott core states of Fermi gases on triangular lattices, highlighting their unique spin configurations and the mechanism behind plateau formation.

Findings

Plateau structures in Mott core polarization as a function of population imbalance.

Plateaus are stabilized by the metallic surrounding region absorbing excess imbalance.

Unique spin patterns are identified within the plateau states.

Abstract

In order to demonstrate that atomic Fermi gas is a good experimental reality in studying unsolved problems in frustrated interacting-spin systems, we numerically examine the Mott core state emerged by loading two-component atomic Fermi gases on triangular optical lattices. Consequently, we find that plateau like structures are observable in the Mott core polarization as a function of the population imbalance. These plateau states are caused by a flexibility that the surrounding metallic region absorbs the excess imbalance to keep the plateau states inside the Mott core. We also find spin patterns peculiar to the plateau states inside the Mott core.