# Fermi-liquid effects in the transresistivity in quantum Hall double layers near $\nu= 1/2 $

## TL;DR

This paper theoretically investigates how Fermi-liquid interactions influence the Coulomb drag transresistivity in quantum Hall double layers near half filling, explaining experimental observations and showing independence from interlayer spacing.

## Contribution

It introduces a theoretical model accounting for Fermi-liquid effects on transresistivity, aligning with experimental data and highlighting the significance of quasiparticle interactions.

## Key findings

- Fermi-liquid interactions significantly affect transresistivity.
- Transresistivity shows independence from interlayer spacing.
- Results agree with experimental measurements.

## Abstract

Here, we present theoretical studies of the temperature and magnetic field dependences of the Coulomb drag transresistivity between two parallel layers of two dimensional electron gases in quantum Hall regime near half filling of the lowest Landau level. It is shown that Fermi-liquid interactions between the relevant quasiparticles could give a significant effect on the transresistivity, providing its independence of the interlayer spacing for spacings taking on values reported in the experiments. Obtained results agree with the experimental evidence.