What question did this study set out to answer?

This study aims to explore the electronic structure of the heavy fermion superconductor CeCoIn5 using angle-resolved photoemission spectroscopy.

May 17, 2026Acta Physica Polonica B0 citationsOpen Access

Hybridization Effects in CeCoIn\ (₅\) Studied by Angle-resolved Photoemission Spectroscopy

Q: What does this research mean for the field?

In the heavy fermion superconductor CeCoIn5, coupling between 4f-states and conduction bands below the coherence temperature produces a non-uniform distribution of 4f-derived spectral weight across the Fermi surface and the formation of heavy quasiparticle bands. Novelty: ClaimNovelty.INCREMENTAL. Consensus alignment: ConsensusAlignment.NEUTRAL.

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RKR. Kurleto MRM. Rosmus ŁWŁ. Walczak

Key Points

This study aims to explore the electronic structure of the heavy fermion superconductor CeCoIn5 using angle-resolved photoemission spectroscopy.
Conducted angle-resolved photoelectron spectroscopy (ARPES) on CeCoIn5
Examined spectral weight distribution across the Fermi surface map at low temperatures (< 6 K)
Analyzed coupling effects between 4f states and conduction bands near the Fermi level.
Observed non-uniform distribution of 4f-derived spectral weight across the Fermi surface
Noted rapid changes in band slope and increasing 4f contribution near the Fermi level
Identified presence of heavy quasiparticle bands with effective mass approximately 100 times that of an electron.

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~ K T_ coh 45\) K). Different effects of the coupling between \ (4f\) -states and conduction bands were observed near the Fermi level (\ (E_ F\) ): (i) rapid change of the band slope and increasing \ (4f\) spectral contribution, when approaching \ (E_ F\), (ii) presence of heavy quasiparticle bands (\ (m^ 100mₑ\) ). Abstract Published by the Jagiellonian University 2026 authors

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Kurleto et al. (2026) studied this question.

synapsesocial.com/papers/6a095c6d7880e6d24efe2863 https://doi.org/10.5506/aphyspolb.57.5-a20

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May 17, 2026Acta Physica Polonica B0 citationsOpen Access

Hybridization Effects in CeCoIn\ (₅\) Studied by Angle-resolved Photoemission Spectroscopy

View Full Paper

RKR. Kurleto MRM. Rosmus ŁWŁ. Walczak

Key Points

This study aims to explore the electronic structure of the heavy fermion superconductor CeCoIn5 using angle-resolved photoemission spectroscopy.
Conducted angle-resolved photoelectron spectroscopy (ARPES) on CeCoIn5
Examined spectral weight distribution across the Fermi surface map at low temperatures (< 6 K)
Analyzed coupling effects between 4f states and conduction bands near the Fermi level.
Observed non-uniform distribution of 4f-derived spectral weight across the Fermi surface
Noted rapid changes in band slope and increasing 4f contribution near the Fermi level
Identified presence of heavy quasiparticle bands with effective mass approximately 100 times that of an electron.

Abstract

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Cite This Study

Kurleto et al. (2026) studied this question.

synapsesocial.com/papers/6a095c6d7880e6d24efe2863 https://doi.org/10.5506/aphyspolb.57.5-a20

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