{"paper":{"title":"Ratchet effect in spatially modulated bilayer graphene: Signature of hydrodynamic transport","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"cond-mat.mes-hall","authors_text":"Dieter Weiss, Erwin M\\\"onch, Ivan Yahniuk, Jonathan Eroms, Katja Lindner, Kenji Watanabe, Leonid E. Golub, Robin Huber, Sergey D. Ganichev, Sergey O. Potashin, Takashi Taniguchi, Valentin Yu. Kachorovskii, Vasily V. Bel'kov","submitted_at":"2021-11-17T15:01:40Z","abstract_excerpt":"We report on the observation of the ratchet effect -- generation of direct electric current in response to external terahertz (THz) radiation -- in bilayer graphene, where inversion symmetry is broken by an asymmetric dual-grating gate potential. As a central result, we demonstrate that at high temperature, $T = 150~\\textrm{K}$, the ratchet current decreases at high frequencies as $ \\propto 1/\\omega^2$, while at low temperature, $T = 4.2~\\textrm{K}$, the frequency dependence becomes much stronger $\\propto 1/\\omega^6$. The developed theory shows that the frequency dependence of the ratchet curr"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2111.09169","kind":"arxiv","version":1},"verdict":{"id":null,"model_set":{},"created_at":null,"strongest_claim":"","one_line_summary":"","pipeline_version":null,"weakest_assumption":"","pith_extraction_headline":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/2111.09169/integrity.json","findings":[],"available":true,"detectors_run":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938"},"references":{"count":0,"sample":[],"resolved_work":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","internal_anchors":0},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"author_claims":{"count":0,"strong_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"builder_version":"pith-number-builder-2026-05-17-v1"}