Charge-localization-driven metal-insulator phase transition in layered molecular conductors
Fuente:
arXiv
Saved in:
| Main Authors: | , , , , , , , , , |
|---|---|
| Format: | Preprint |
| Published: |
2025
|
| Subjects: | |
| Online Access: | |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1866914216431058944 |
|---|---|
| author | Priya, Savita Wenzel, Maxim Iakutkina, Olga Schmidt, Marvin Prange, Christian Schweitzer, Dieter Saito, Yohei Kato, Reizo Hiraki, Koichi Dressel, Martin |
| author_facet | Priya, Savita Wenzel, Maxim Iakutkina, Olga Schmidt, Marvin Prange, Christian Schweitzer, Dieter Saito, Yohei Kato, Reizo Hiraki, Koichi Dressel, Martin |
| contents | The organic conductor $α$-(BEDT-TTF)$_2$I$_3$ provides the prime example of a charge-order-driven metal-insulator transition. Restricted chemical substitution of S atoms by Se in the constituent molecules allows us to modify the electronic properties. This not only decreases the transition temperature but, in addition, alters the phase transition mechanism, resulting in the ground state deviating from the charge-ordered insulator state of the parent compound. Employing infrared optical spectroscopy, we investigate changes in the charge dynamics. Furthermore, we demonstrate the absence of charge ordering in the Se-substituted materials and suggest that the phase transition is instead driven by the localization of the itinerant charge carriers due to strong electron-phonon interactions. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2509_24518 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Charge-localization-driven metal-insulator phase transition in layered molecular conductors Priya, Savita Wenzel, Maxim Iakutkina, Olga Schmidt, Marvin Prange, Christian Schweitzer, Dieter Saito, Yohei Kato, Reizo Hiraki, Koichi Dressel, Martin Strongly Correlated Electrons The organic conductor $α$-(BEDT-TTF)$_2$I$_3$ provides the prime example of a charge-order-driven metal-insulator transition. Restricted chemical substitution of S atoms by Se in the constituent molecules allows us to modify the electronic properties. This not only decreases the transition temperature but, in addition, alters the phase transition mechanism, resulting in the ground state deviating from the charge-ordered insulator state of the parent compound. Employing infrared optical spectroscopy, we investigate changes in the charge dynamics. Furthermore, we demonstrate the absence of charge ordering in the Se-substituted materials and suggest that the phase transition is instead driven by the localization of the itinerant charge carriers due to strong electron-phonon interactions. |
| title | Charge-localization-driven metal-insulator phase transition in layered molecular conductors |
| topic | Strongly Correlated Electrons |
| url | https://arxiv.org/abs/2509.24518 |