Two-Fluid Model for Heavy Electron Physics

TL;DR

The paper reviews the two-fluid model's effectiveness in explaining the complex behavior of f-electrons in heavy electron materials and discusses its implications for understanding their microscopic origins.

Contribution

It provides a comprehensive review of the two-fluid model and explores its potential in elucidating the microscopic mechanisms behind heavy electron phenomena.

Findings

Two-fluid model successfully explains experimental observations in heavy electron systems.

The model describes the temperature-dependent evolution of f-electron character.

Implications for the microscopic understanding of heavy electron physics are discussed.

Abstract

The two-fluid model is a phenomenological description of the gradual change of the itinerant and local characters of the f-electrons with temperature and other tuning parameters and has been quite successful in explaining many unusual and puzzling experimental observations in heavy electron materials. We review some of these results and discuss possible implications of the two-fluid model in understanding the microscopic origin of heavy electron physics.