Universal Behavior of Two-Dimensional 3He at Low Temperatures

TL;DR

This paper shows that the universal features of the phase diagram of two-dimensional 3He resemble those of heavy-fermion metals, and proposes a simple expression for the effective mass that captures this behavior.

Contribution

It introduces a unified theoretical description of 2D 3He’s effective mass, revealing its universal behavior similar to heavy-fermion metals.

Findings

Universal phase diagram features of 2D 3He resemble heavy-fermion metals.

Proposed a simple expression for the effective mass M^*(T,x).

Unified description explains diverse experimental observations.

Abstract

On the example of two-dimensional (2D) 3He we demonstrate that the main universal features of its experimental temperature T - density x phase diagram [see M. Neumann, J. Ny\'{e}ki, J. Saunders, Science 317, 1356 (2007)] look like those in the heavy-fermion metals. Our comprehensive theoretical analysis of experimental situation in 2D 3He allows us to propose a simple expression for effective mass M^*(T,x), describing all diverse experimental facts in 2D 3He in unified manner and demonstrating that the universal behavior of M^*(T,x) coincides with that observed in HF metals.