Hybridization Effects in CeCoIn\(_5\) Studied by Angle-resolved Photoemission Spectroscopy
Year: 2026
Type: article
Abstract: We studied the electronic structure of a canonical heavy fermion superconductor CeCoIn\(_5\) using angle-resolved photoelectron spectroscopy (ARPES). We observed a non-uniform distribution of \(4f\)-derived spectral weight across the Fermi surface map measured below the coherence temperature (\(T=6~\mathrm {K} \lt T_\mathrm {coh}\approx 45\) K). Different effects of the coupling between \(4f\)-states and conduction bands were observed near the Fermi level (\(E_\mathrm {F}\)): (i) rapid change of the band slope and increasing \(4f\) spectral contribution, when approaching \(E_\mathrm {F}\), (ii) presence of heavy quasiparticle bands (\(m^{\star }\sim 100m_e\)). Abstract Published by the Jagiellonian University 2026 authors
Source: Acta Physica Polonica B
Language: English
Subfield: Condensed Matter Physics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: diamond
OpenAlex ID: W7161309552