Ferroelectric hysteresis in singly aligned graphene-hBN moiré superlattices
Fuente:
arXiv
Gespeichert in:
| Hauptverfasser: | , , , , , , , , , |
|---|---|
| Format: | Preprint |
| Veröffentlicht: |
2026
|
| Schlagworte: | |
| Online-Zugang: | |
| Tags: |
Tag hinzufügen
Keine Tags, Fügen Sie den ersten Tag hinzu!
|
| _version_ | 1866913180144369664 |
|---|---|
| author | Tu, Bao Q. Ahmed, Tanweer Avedissian, Garen Lancaster, Suzanne Sharma, Mayank Watanabe, Kenji Taniguchi, Takashi Casanova, Fèlix Gobbi, Marco Hueso, Luis E. |
| author_facet | Tu, Bao Q. Ahmed, Tanweer Avedissian, Garen Lancaster, Suzanne Sharma, Mayank Watanabe, Kenji Taniguchi, Takashi Casanova, Fèlix Gobbi, Marco Hueso, Luis E. |
| contents | Ferroelectric materials have the unique ability to maintain an electric polarization which can be reversed under an external applied electric field. This property makes them valuable for applications such as non-volatile random-access memories, transducers, actuators and electro optic modulators. Recently, emergent unconventional ferroelectricity has been demonstrated in moiré superlattices of bilayer graphene and hexagonal boron nitride (hBN) hosting non centrosymmetric stacking order. Whether this phenomenon is also present in noncentrosymmetric single layer graphene (SLG)-hBN moiré superlattices is still under debate. Here we demonstrate a ferroelectric response in an SLG-hBN moiré superlattice. Through Hall measurements, we pinpoint the origin of the hysteretic behavior to abnormal charge screening due to the moiré superlattice band and estimate the spontaneous polarization magnitude in the moiré superlattice structure. Temperature dependent measurements confirm that the hysteretic behavior persists from 2K up to room temperature, opening opportunities for high-mobility, ultrathin non-volatile devices |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2606_02338 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | Ferroelectric hysteresis in singly aligned graphene-hBN moiré superlattices Tu, Bao Q. Ahmed, Tanweer Avedissian, Garen Lancaster, Suzanne Sharma, Mayank Watanabe, Kenji Taniguchi, Takashi Casanova, Fèlix Gobbi, Marco Hueso, Luis E. Mesoscale and Nanoscale Physics Materials Science Ferroelectric materials have the unique ability to maintain an electric polarization which can be reversed under an external applied electric field. This property makes them valuable for applications such as non-volatile random-access memories, transducers, actuators and electro optic modulators. Recently, emergent unconventional ferroelectricity has been demonstrated in moiré superlattices of bilayer graphene and hexagonal boron nitride (hBN) hosting non centrosymmetric stacking order. Whether this phenomenon is also present in noncentrosymmetric single layer graphene (SLG)-hBN moiré superlattices is still under debate. Here we demonstrate a ferroelectric response in an SLG-hBN moiré superlattice. Through Hall measurements, we pinpoint the origin of the hysteretic behavior to abnormal charge screening due to the moiré superlattice band and estimate the spontaneous polarization magnitude in the moiré superlattice structure. Temperature dependent measurements confirm that the hysteretic behavior persists from 2K up to room temperature, opening opportunities for high-mobility, ultrathin non-volatile devices |
| title | Ferroelectric hysteresis in singly aligned graphene-hBN moiré superlattices |
| topic | Mesoscale and Nanoscale Physics Materials Science |
| url | https://arxiv.org/abs/2606.02338 |