Convergence of the enhancement of the effective mass under pressure and magnetic field in heavy-fermion compounds: CeRu2Si2, CeRh2Si2, and CeIn3

TL;DR

This paper investigates how the effective mass in heavy-fermion compounds converges to a critical value near quantum phase transitions induced by pressure or magnetic field, highlighting the importance of discovering ideal materials for Fermi surface studies.

Contribution

It presents combined macroscopic and microscopic evidence of effective mass convergence in heavy-fermion compounds near quantum critical points, emphasizing the need for ideal materials.

Findings

Effective mass approaches a critical value near quantum phase transitions.

Pressure and magnetic field can tune compounds from AF to PM states.

Highlights the importance of Fermi surface observation across transitions.

Abstract

Emphasis is given on the observation of a convergence to a critical value of the effective mass of a heavy fermion compound by tuning it through a quantum instability either by applying pressure or magnetic field from an antiferromagnetic (AF) to a paramagnetic (PM) ground state. Macroscopic and microscopic results are discussed and the main message is to rush to the discovery of an ideal material whose Fermi surface could be fully observed on both sides of each quantum phase transition.