Transverse dipole spin modes in quantum dots

TL;DR

This paper analyzes the transverse dipole spin response of large quantum dots using time-dependent current density functional theory, highlighting the dominance of a low energy transverse mode at high spin magnetization.

Contribution

It provides a systematic analysis of the transverse dipole spin response in quantum dots, including comparisons with longitudinal response and results at specific magnetic fields.

Findings

Transverse spin response is dominated by a low energy mode at high spin magnetization.

Results are reported for magnetic fields at integer filling factors.

Comparison with longitudinal spin response reveals similar behaviors.

Abstract

We have carried out a systematic analysis of the transverse dipole spin response of a large size quantum dot within time-dependent current density functional theory. Results for magnetic fields corresponding to integer filling factors are reported, as well as a comparison with the longitudinal dipole spin response. As in the two dimensional electron gas, the spin response at high spin magnetization is dominated by a low energy transverse mode.