Electron-phonon instability in graphene revealed by global and local noise probes
Abstract
Studying the electronic properties of graphene under extreme nonequilibrium conditions has provided a productive testbed to probe and monitor exotic transport phenomena. Andersen et al. report measurements of electron transport in ultraclean graphene devices where the electron drift velocity is extremely high. They found that direct current at high drift velocities generates a large increase in the noise at gigahertz frequencies and that the noise grows exponentially in the direction of the current. The authors attribute the emission mechanism to amplification of acoustic phonons through the Cerenkov effect.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- Apr 12, 2019
- Source ID
- 10.1126/science.aaw2104
Entities
People
- Bo L Dwyer
- Eugene A. Demler
- Hongkun Park
- Javier Sanchez-Yamagishi
- Joaquin F Rodriguez-Nieva
- Kartiek Agarwal
- Kenji Watanabe
- Mikhail Lukin
- Philip Kim
- Takashi Taniguchi
- Trond I Andersen
Organizations
- Gordon and Betty Moore Foundation
- Harvard University
- McGill University
- National Institute for Materials Science
- National Science Foundation
- United States Department of Defense
- University of California, Irvine