Activation energies for spin-reversed excitations in the fractional quantum Hall effect

TL;DR

This paper calculates the energy gaps for spin-reversed excitations in fractional quantum Hall states, suggesting their potential relevance in experimental conditions, thereby enhancing understanding of excitation mechanisms in these systems.

Contribution

It introduces calculations of spin-reversed excitation energies for various fractional quantum Hall states, highlighting their possible experimental significance.

Findings

Spin-reversed excitations have energy gaps comparable to other excitations.

Such excitations may be observed in accessible experimental regimes.

Results provide insight into the role of spin in fractional quantum Hall phenomena.

Abstract

The activation energy measured in transport experiments in the fractional Hall regime corresponds to the energy required to create a far separated particle hole pair. We calculate, for several fractional quantum Hall states, the energy gaps for the excitation in which the excited composite fermion reverses its spin quantum number. Our results indicate that such spin reversed excitations may be relevant in experimentally accessible regimes.