Strange Metal in Magic-Angle Graphene with near Planckian Dissipation
| Autor: | Pablo Jarillo-Herrero, Takashi Taniguchi, T. Senthil, Oriol Rubies-Bigorda, Daniel Rodan-Legrain, Debanjan Chowdhury, Yuan Cao, Kenji Watanabe |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
Physics
Superconductivity Magic angle Condensed Matter - Mesoscale and Nanoscale Physics Condensed matter physics Strongly Correlated Electrons (cond-mat.str-el) Graphene Condensed Matter - Superconductivity General Physics and Astronomy FOS: Physical sciences 01 natural sciences law.invention Superconductivity (cond-mat.supr-con) Condensed Matter - Strongly Correlated Electrons law Electrical resistivity and conductivity Scattering rate 0103 physical sciences Mesoscale and Nanoscale Physics (cond-mat.mes-hall) Condensed Matter::Strongly Correlated Electrons Cuprate Fermi liquid theory 010306 general physics Bilayer graphene |
| Zdroj: | Physical review letters. 124(7) |
| ISSN: | 1079-7114 |
| Popis: | Recent experiments on magic-angle twisted bilayer graphene have discovered correlated insulating behavior and superconductivity at a fractional filling of an isolated narrow band. In this paper we show that magic-angle bilayer graphene exhibits another hallmark of strongly correlated systems --- a broad regime of $T-$linear resistivity above a small, density dependent, crossover temperature--- for a range of fillings near the correlated insulator. We also extract a transport "scattering rate", which satisfies a near Planckian form that is universally related to the ratio of $(k_BT/\hbar)$. Our results establish magic-angle bilayer graphene as a highly tunable platform to investigate strange metal behavior, which could shed light on this mysterious ubiquitous phase of correlated matter. Comment: 7 pages, 3 figures. (Supplementary material: 3 pages, 2 figures) |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|