Saved in:
| Main Authors: | , , , , , , |
|---|---|
| Format: | Preprint |
| Published: |
2025
|
| Subjects: | |
| Online Access: | https://arxiv.org/abs/2512.22576 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1866914221959151616 |
|---|---|
| author | Crispino, Matteo Witt, Niklas Enzner, Stefan Gorni, Tommaso Medici, Luca de' Di Sante, Domenico Sangiovanni, Giorgio |
| author_facet | Crispino, Matteo Witt, Niklas Enzner, Stefan Gorni, Tommaso Medici, Luca de' Di Sante, Domenico Sangiovanni, Giorgio |
| contents | Kagome metals exhibit rich correlated-electron physics, yet a systematic understanding of the degree of correlation across transition-metal species remains elusive. Using density-functional theory plus multi-orbital slave-spin mean-field theory, we investigate electronic correlations in the Ti-, V-, and Cr-based 135 compounds with Sb and Bi pnictogens. We find that the significantly stronger degree of correlation of the Cr-based materials compared to Ti and V can only be explained through the synergy of two effects: the larger electron filling of the $d$-shell and the reduced characteristic kinetic energy. We put forward that the substitution of Sb with Bi strengthens correlations in all compounds and make the prediction that the-yet-to-be-synthesized CsCr$_3$Bi$_5$ must be the most strongly correlated member of the entire family. These findings provide a quantitative, band-structure-based framework for understanding and predicting correlation strength in Kagome metals. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2512_22576 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Tunable Electronic Correlations in 135-Kagome Metals Crispino, Matteo Witt, Niklas Enzner, Stefan Gorni, Tommaso Medici, Luca de' Di Sante, Domenico Sangiovanni, Giorgio Strongly Correlated Electrons Kagome metals exhibit rich correlated-electron physics, yet a systematic understanding of the degree of correlation across transition-metal species remains elusive. Using density-functional theory plus multi-orbital slave-spin mean-field theory, we investigate electronic correlations in the Ti-, V-, and Cr-based 135 compounds with Sb and Bi pnictogens. We find that the significantly stronger degree of correlation of the Cr-based materials compared to Ti and V can only be explained through the synergy of two effects: the larger electron filling of the $d$-shell and the reduced characteristic kinetic energy. We put forward that the substitution of Sb with Bi strengthens correlations in all compounds and make the prediction that the-yet-to-be-synthesized CsCr$_3$Bi$_5$ must be the most strongly correlated member of the entire family. These findings provide a quantitative, band-structure-based framework for understanding and predicting correlation strength in Kagome metals. |
| title | Tunable Electronic Correlations in 135-Kagome Metals |
| topic | Strongly Correlated Electrons |
| url | https://arxiv.org/abs/2512.22576 |