First-Principles Study of the Fermi Surface Topology of CeCu$_{2

Summary

This study investigates the Fermi surface topology of CeCu2Si2 using the Gutzwiller Wavefunction Approximation (GWA) method, considering the effects of crystal field splitting (CFS) and electron correlations. The results show that the GWA method can reproduce the two Fermi sheets observed in experiments and that CFS plays a significant role in the electronic structure of CeCu2Si2.

Highlights

• The GWA method is used to study the Fermi surface topology of CeCu2Si2.
• The effects of crystal field splitting (CFS) and electron correlations are considered.
• The results show that CFS is significant to the electronic structure of CeCu2Si2.
• The GWA method can reproduce the two Fermi sheets observed in experiments.
• The study highlights the importance of considering CFS in understanding the electronic structure of CeCu2Si2.
• The results are in agreement with previous studies using renormalized band theory and dynamical mean-field theory.
• The study provides new insights into the electronic structure and Fermi surface topology of CeCu2Si2.

Key Insights

• The GWA method is a powerful tool for studying the electronic structure and Fermi surface topology of strongly correlated systems like CeCu2Si2.
• Crystal field splitting plays a crucial role in shaping the electronic structure of CeCu2Si2, particularly in the formation of the two Fermi sheets.
• Electron correlations are also essential in understanding the electronic structure of CeCu2Si2, and the GWA method can capture these effects accurately.
• The study demonstrates the importance of considering both CFS and electron correlations in understanding the electronic structure and Fermi surface topology of CeCu2Si2.
• The results of this study are in agreement with previous studies using different methods, highlighting the reliability of the GWA method.
• The study provides new insights into the electronic structure and Fermi surface topology of CeCu2Si2, which can help in understanding the properties of this material.
• The GWA method can be used to study other strongly correlated systems, providing a new avenue for understanding the electronic structure and properties of these materials.

Mindmap

Citation

Tutchton, R. M., Julien, J.-P., Si, Q., & Zhu, J.-X. (2024). First-Principles Study of the Fermi Surface Topology of CeCu${2}$Si${2}$ (Version 1). arXiv. https://doi.org/10.48550/ARXIV.2412.18183