Work

Concealed Mott criticality: Unifying the Kondo breakdown and doped charge-transfer insulators

Year: 2025

Type: article

Abstract: I show that the quantum critical points observed in heavy fermions (the ‘Kondo breakdown’) and in doped cuprates can be understood in terms of concealed Mott criticality. In this picture, one species of electrons undergoes a Mott localization transition, in the presence of metallic charge carries. As is shown in a simple toy model, this results in a Fermi surface jump at the transition, as well as mass enhancement on both the ‘large’ and ‘small’ Fermi surface side of the transition, consistent with the experimental observations. • The Kondo breakdown and the cuprate quantum critical point in cuprates are related. • They are both a continuous Mott transition in the presence of extra charge carriers. • This ‘Concealed Mott’ criticality is explained using a phenomenological model.

Source: Physica C Superconductivity

DOI: 10.1016/j.physc.2025.1354720

Author: Louk Rademaker

Institutions: University of Geneva, Leiden University

Language: English

Topic: Physics of Superconductivity and Magnetism

Subfield: Condensed Matter Physics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: hybrid

Estimated APC paid: $2,400

Funders: National Science Foundation, Schweizerischer Nationalfonds zur Förderung der Wissenschaftlichen Forschung