Effective Mass and g-Factor of Four Flux Quanta Composite Fermions

TL;DR

This study explores the properties of four flux quanta composite fermions near nu=3/4, revealing their effective mass and g-factor are similar to those of two flux quanta composite fermions near nu=3/2, enhancing understanding of fractional quantum Hall states.

Contribution

It provides new insights into the effective mass and g-factor of four flux quanta composite fermions near nu=3/4, expanding the understanding of composite fermion behavior in fractional quantum Hall systems.

Findings

Collapse of fractional quantum Hall gaps near nu=3/4 explained by composite fermions with mass and spin.

Effective mass and g-factor of four flux quanta composite fermions are similar to those of two flux quanta composite fermions.

Results support the composite fermion model in describing fractional quantum Hall states.

Abstract

We investigate the properties of composite fermions with four attached flux quanta through tilted field experiments near Landau level filling factor nu = 3/4. The observed collapse of fractional quantum Hall gaps in the vicinity of this quarter-filling state can be comprehensively understood in terms of composite fermions with mass and spin. Remarkably, the effective mass and g-factor of these four flux quanta composite fermions around nu = 3/4 are very similar to those of two flux quanta composite fermions around nu = 3/2.