# Electronic structure of heavy fermion system CePt2In7 from angle-resolved photoemission spectroscopy

## TL;DR

This study uses high-resolution ARPES to explore the electronic structure of CePt2In7, revealing multiple Fermi surfaces, a complex band structure, and weaker band renormalization compared to CeCoIn5, aiding understanding of heavy fermion behaviors.

## Contribution

It provides detailed experimental and theoretical insights into CePt2In7's electronic structure, highlighting its weaker band renormalization relative to CeCoIn5, which is significant for heavy fermion research.

## Key findings

- Multiple Fermi surface sheets identified
- Good agreement between measurements and calculations
- Weaker band renormalization compared to CeCoIn5

## Abstract

We have carried out high-resolution angle-resolved photoemission measurements on the Cebased heavy fermion compound CePt2In7 that exhibits stronger two-dimensional character than the prototypical heavy fermion system CeCoIn5. Multiple Fermi surface sheets and a complex band structure are clearly resolved. We have also performed detailed band structure calculations on CePt2In7. The good agreement found between our measurements and the calculations suggests that the band renormalization effect is rather weak in CePt2In7. A comparison of the common features of the electronic structure of CePt2In7 and CeCoIn5 indicates that CeCoIn5 shows a much stronger band renormalization effect than CePt2In7. These results provide new information for understanding the heavy fermion behaviors and unconventional superconductivity in Ce-based heavy fermion systems.