English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

We use stochastic expansion and exact diagonalization to study themagic-angle twisted bilayer graphene (TBG) on a disordered substrate. We showthat the substrate-induced strong Coulomb disorder in TBG with the chemicalpotential at the level of the flatbands drives the system to a network ofweakly coupled Sachdev-Ye-Kitaev (SYK) bundles, stabilizing an emergent quantumchaotic strange metal (SM) phase of TBG that exhibits the absence ofquasiparticles. The Gaussian orthogonal ensemble dominates TBG's long-timechaotic dynamics at strong disorder, whereas fast quantum scrambling appears inthe short-time dynamics. In weak disorder, gapped phases of TBG exhibitexponentially decaying specific heat capacity and exponential decay inout-of-time-ordered correlators (OTOC). This is the system behavior incorrelated insulator and superconducting phases, in agreement with thecorresponding Larkin-Ovchinnikov result for correlators. The result suggests alow-temperature transition from the superconducting and correlated insulatingphases into the strange metal upon increasing the disorder strength. We proposea finite-temperature phase diagram for Coulomb-disordered TBG and discuss theexperimental consequences of the emergent SM phase.

physical review. b./physical review. b

Strange metal phase of disordered magic-angle twisted bilayer graphene  at low temperatures: from flatbands to weakly coupled Sachdev-Ye-Kitaev  bundles