Two-Dimensional Moiré Polaronic Electron Crystals
Fuente:
arXiv
Saved in:
| Main Authors: | , , , , , , , , , , , , , , |
|---|---|
| Format: | Preprint |
| Published: |
2023
|
| Subjects: | |
| Online Access: | |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1866913251206365184 |
|---|---|
| author | Arsenault, Eric A. Li, Yiliu Yang, Birui Wang, Xi Park, Heonjoon Mosconi, Edoardo Ronca, Enrico Taniguchi, Takashi Watanabe, Kenji Gamelin, Daniel Millis, Andrew Dean, Cory R. de Angelis, Filippo Xu, Xiaodong Zhu, X. -Y. |
| author_facet | Arsenault, Eric A. Li, Yiliu Yang, Birui Wang, Xi Park, Heonjoon Mosconi, Edoardo Ronca, Enrico Taniguchi, Takashi Watanabe, Kenji Gamelin, Daniel Millis, Andrew Dean, Cory R. de Angelis, Filippo Xu, Xiaodong Zhu, X. -Y. |
| contents | Two-dimensional moiré materials have emerged as the most versatile platforms for realizing quantum phases of electrons. Here, we explore the stability origins of correlated states in WSe2/WS2 moiré superlattices. We find that ultrafast electronic excitation leads to melting of the Mott states on time scales five times longer than predictions from the charge hopping integrals and the melting rates are thermally activated, with activation energies of 18 and 13 meV for the one- and two-hole Mott states, respectively, suggesting significant electron-phonon coupling. DFT calculation of the one-hole Mott state confirms polaron formation and yields a hole-polaron binding energy of 16 meV. These findings reveal a close interplay of electron-electron and electron-phonon interactions in stabilizing the polaronic Mott insulators at transition metal dichalcogenide moiré interfaces. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2307_16563 |
| institution | arXiv |
| publishDate | 2023 |
| record_format | arxiv |
| spellingShingle | Two-Dimensional Moiré Polaronic Electron Crystals Arsenault, Eric A. Li, Yiliu Yang, Birui Wang, Xi Park, Heonjoon Mosconi, Edoardo Ronca, Enrico Taniguchi, Takashi Watanabe, Kenji Gamelin, Daniel Millis, Andrew Dean, Cory R. de Angelis, Filippo Xu, Xiaodong Zhu, X. -Y. Strongly Correlated Electrons Two-dimensional moiré materials have emerged as the most versatile platforms for realizing quantum phases of electrons. Here, we explore the stability origins of correlated states in WSe2/WS2 moiré superlattices. We find that ultrafast electronic excitation leads to melting of the Mott states on time scales five times longer than predictions from the charge hopping integrals and the melting rates are thermally activated, with activation energies of 18 and 13 meV for the one- and two-hole Mott states, respectively, suggesting significant electron-phonon coupling. DFT calculation of the one-hole Mott state confirms polaron formation and yields a hole-polaron binding energy of 16 meV. These findings reveal a close interplay of electron-electron and electron-phonon interactions in stabilizing the polaronic Mott insulators at transition metal dichalcogenide moiré interfaces. |
| title | Two-Dimensional Moiré Polaronic Electron Crystals |
| topic | Strongly Correlated Electrons |
| url | https://arxiv.org/abs/2307.16563 |