Superballistic Conduction in Hydrodynamic Antidot Graphene Superlattices
Viscous electron flow exhibits exotic signatures such as superballistic conduction. In order to observe hydrodynamics effects, a 2D device where the current flow is as inhomogeneous as possible is desirable. To this end, we build three antidot graphene superlattices with different hole diameters. We measure their electrical properties at various temperatures and under the effect of a perpendicular magnetic field. We find an enhanced superballistic effect, suggesting the effectiveness of the geometry at bending the electron flow. In addition, superballistic conduction, which is related to a transition from a noncollective to a collective regime of transport, behaves nonmonotonically with the magnetic field. We also analyze the device resistance as a function of the size of the antidot superlattice to find characteristic scaling laws describing the different transport regimes. We prove that the antidot superlattice is a convenient geometry for realizing hydrodynamic flow and provide valuable explanations for the technologically relevant effects of superballistic conduction and scaling laws.
Authors
- Daniel Vaquero (ORCID: https://orcid.org/0000-0001-7025-125X)
- Elena Díaz (ORCID: https://orcid.org/0000-0002-2324-5946)
- Juan Salvador‐Sánchez (ORCID: https://orcid.org/0000-0002-3043-6417)
- Ana Pérez‐Rodríguez (ORCID: https://orcid.org/0000-0002-5778-0103)
- Mario Amado (ORCID: https://orcid.org/0000-0002-3296-5064)
- Takashi Taniguchi (ORCID: https://orcid.org/0000-0002-1467-3105)
- Kenji Watanabe (ORCID: https://orcid.org/0000-0003-3701-8119)
- F. Domı́nguez-Adame (ORCID: https://orcid.org/0000-0002-5256-4196)
- Jorge Estrada-Álvarez (ORCID: https://orcid.org/0000-0001-8036-7168)
- Carlos Sánchez‐Sánchez (ORCID: https://orcid.org/0000-0001-8644-3766)
- E. Díez (ORCID: https://orcid.org/0000-0001-7964-4148)
- Vito Clericò (ORCID: https://orcid.org/0000-0001-6646-8309)
Institutions
- Universidad Complutense de Madrid (ES)
- Universidad de Salamanca (ES)
- National Institute for Materials Science (JP)
Publication Details
- Journal
- Physical Review X
- Published
- 2025-02-21
- DOI
- https://doi.org/10.1103/physrevx.15.011039
- Citations
- 9
- Primary Topic
- Graphene research and applications
- Type
- article
- Field-Weighted Citation Impact
- 4.14
Funders
- Comunidad de Madrid
- Ministerio de Ciencia, Innovación y Universidades
- Bundesministerium für Bildung und Forschung
- Consejería de Educación, Junta de Castilla y León
- Horizon 2020 Framework Programme
- European Regional Development Fund
- Agencia Estatal de Investigación
- H2020 Marie Skłodowska-Curie Actions