Energy Spectrum for Neutral Collective Excitations in Striped Hall States

TL;DR

This paper investigates the neutral collective excitations in striped Hall states, revealing anisotropic NG modes and periodic line nodes through theoretical approximations.

Contribution

It introduces a detailed analysis of the excitation spectrum in striped Hall states using the single mode and Hartree-Fock approximations.

Findings

Spectrum includes anisotropic NG modes.

Presence of periodic line nodes in the excitation spectrum.

Analysis specific to half-filled third and fourth Landau levels.

Abstract

Neutral collective excitations in the striped Hall state are studied by using the single mode approximation and Hartree-Fock approximation at the half-filled third and fourth Landau level. We find that the spectrum includes anisotropic NG modes and periodic line nodes.