Effects of thickness on the spin susceptibility of the 2D electron gas

TL;DR

This paper estimates how the finite thickness of real 2D electron gases affects their spin susceptibility, showing good agreement with experiments and minor effects from weak disorder.

Contribution

It introduces a method to incorporate finite thickness effects into spin susceptibility predictions for 2D electron gases, aligning theoretical predictions with experimental data.

Findings

Finite thickness significantly influences spin susceptibility.

Good agreement between theory and experiment achieved.

Weak disorder causes minor susceptibility enhancement.

Abstract

Using available quantum Monte Carlo predictions for a strictly 2D electron gas, we have estimated the spin susceptibility of electrons in actual devices taking into account the effect of the finite transverse thickness and finding a very good agreement with experiments. A weak disorder, as found in very clean devices and/or at densities not too low, just brings about a minor enhancement of the susceptibility.