Back to Search
Start Over
Large linear-in-temperature resistivity in twisted bilayer graphene
- Source :
- Nature Physics. 15:1011-1016
- Publication Year :
- 2019
- Publisher :
- Springer Science and Business Media LLC, 2019.
-
Abstract
- Twisted bilayer graphene has recently emerged as a platform for hosting correlated phenomena. For twist angles near θ ≈ 1.1°, the low-energy electronic structure of twisted bilayer graphene features isolated bands with a flat dispersion1,2. Recent experiments have observed a variety of low-temperature phases that appear to be driven by electron interactions, including insulating states, superconductivity and magnetism3–6. Here we report electrical transport measurements up to room temperature for twist angles varying between 0.75° and 2°. We find that the resistivity, ρ, scales linearly with temperature, T, over a wide range of T before falling again owing to interband activation. The T-linear response is much larger than observed in monolayer graphene for all measured devices, and in particular increases by more than three orders of magnitude in the range where the flat band exists. Our results point to the dominant role of electron–phonon scattering in twisted bilayer graphene, with possible implications for the origin of the observed superconductivity. Transport measurements on twisted bilayer graphene show that a large linear-in-temperature increase in resistivity exists for many twist angles. This may have implications for the mechanism of superconductivity in this material.
- Subjects :
- Physics
Superconductivity
Condensed matter physics
Scattering
General Physics and Astronomy
Electron
Electronic structure
Orders of magnitude (numbers)
01 natural sciences
010305 fluids & plasmas
Electrical resistivity and conductivity
0103 physical sciences
Twist
010306 general physics
Bilayer graphene
Subjects
Details
- ISSN :
- 17452481 and 17452473
- Volume :
- 15
- Database :
- OpenAIRE
- Journal :
- Nature Physics
- Accession number :
- edsair.doi...........90c102616381ce2f7a159a4c54763ada