Giant shift current in electrically tunable superlattice bilayer graphene
The bulk photogalvanic effect generates direct electrical current from incident light. Here, the authors demonstrate that a bilayer graphene film with an imprinted electric superlattice potential can produce a large and tunable photogalvanic current that surpasses previous predictions for twisted bilayer graphene. This response occurs in the far-infrared regime and it can be electrically controlled by tuning both the displacement field and the superlattice moir\'e potential strength, opening new pathways for applications including infrared sensors and detectors.
Authors
- Barun Ghosh (ORCID: https://orcid.org/0000-0001-6634-0508)
- Arun Bansil (ORCID: https://orcid.org/0000-0002-3864-3461)
- Gregory A. Fiete (ORCID: https://orcid.org/0000-0001-9477-0804)
- Matthew Matzelle (ORCID: https://orcid.org/0000-0003-0197-255X)
- Arpit Raj (ORCID: https://orcid.org/0000-0002-2532-1340)
- Nabil Atlam (ORCID: https://orcid.org/0009-0008-4334-6008)
- Swati Chaudhary (ORCID: https://orcid.org/0009-0007-2457-2950)
Institutions
- The University of Tokyo (JP)
- Bose (United States) (US)
- Universidad del Noreste (MX)
Publication Details
- Journal
- Physical review. B./Physical review. B
- Published
- 2025-12-09
- DOI
- https://doi.org/10.1103/3npr-fqt1
- Citations
- 1
- Primary Topic
- Graphene research and applications
- Type
- article
- Field-Weighted Citation Impact
- 0.52