{"work":{"id":"f08af0cc-42e6-4441-88ee-7efc38966e21","openalex_id":"https://openalex.org/W2793369479","doi":"10.1038/nature26160","arxiv_id":"1803.02342","raw_key":null,"title":"Unconventional superconductivity in magic-angle graphene superlattices , volume =","authors":[{"given":"Yuan","family":"Cao","sequence":"first","affiliation":[]},{"given":"Valla","family":"Fatemi","sequence":"additional","affiliation":[]},{"given":"Shiang","family":"Fang","sequence":"additional","affiliation":[]},{"given":"Kenji","family":"Watanabe","sequence":"additional","affiliation":[]},{"given":"Takashi","family":"Taniguchi","sequence":"additional","affiliation":[]},{"given":"Efthimios","family":"Kaxiras","sequence":"additional","affiliation":[]},{"given":"Pablo","family":"Jarillo-Herrero","sequence":"additional","affiliation":[]}],"authors_text":"Cao, Yuan and Fatemi, Valla and Fang, Shiang and Watanabe, Kenji and Taniguchi, Takashi and Kaxiras, Efthimios and Jarillo-Herrero, Pablo , month = apr, year =","year":2018,"venue":"cond-mat.mes-hall","abstract":"The understanding of strongly-correlated materials, and in particular unconventional superconductors, has puzzled physicists for decades. Such difficulties have stimulated new research paradigms, such as ultra-cold atom lattices for simulating quantum materials. Here we report on the realization of intrinsic unconventional superconductivity in a 2D superlattice created by stacking two graphene sheets with a small twist angle. For angles near $1.1^\\circ$, the first `magic' angle, twisted bilayer graphene (TBG) exhibits ultra-flat bands near charge neutrality, which lead to correlated insulating states at half-filling. Upon electrostatic doping away from these correlated insulating states, we observe tunable zero-resistance states with a critical temperature $T_c$ up to 1.7 K. The temperature-density phase diagram shows similarities with that of the cuprates, including superconducting domes. Moreover, quantum oscillations indicate small Fermi surfaces near the correlated insulating phase, in analogy with under-doped cuprates. The relative high $T_c$, given such small Fermi surface (corresponding to a record-low 2D carrier density of $10^{11} \\textrm{cm}^{-2}$ , renders TBG among the strongest coupling superconductors, in a regime close to the BCS-BEC crossover. These novel results establish TBG as the first purely carbon-based 2D superconductor and as a highly tunable platform to investigate strongly-correlated phenomena, which could lead to insights into the physics of high-$T_c$ superconductors and quantum spin liquids.","external_url":"https://doi.org/10.1038/nature26160","cited_by_count":7423,"metadata_source":"doi_reference","metadata_fetched_at":"2026-07-09T07:36:04.011630+00:00","pith_arxiv_id":"1803.02342","created_at":"2026-05-08T20:39:12.019359+00:00","updated_at":"2026-07-11T11:50:26.030339+00:00","title_quality_ok":false,"display_title":"Nature , year =","render_title":"Nature , year ="},"hub":{"state":{"work_id":"f08af0cc-42e6-4441-88ee-7efc38966e21","tier":"hub","tier_reason":"10+ Pith inbound or 1,000+ external citations","pith_inbound_count":20,"external_cited_by_count":7423,"distinct_field_count":7,"first_pith_cited_at":"2024-04-30T03:47:55+00:00","last_pith_cited_at":"2026-07-08T15:42:27+00:00","author_build_status":"not_needed","summary_status":"needed","contexts_status":"needed","graph_status":"needed","ask_index_status":"not_needed","reader_status":"not_needed","recognition_status":"not_needed","updated_at":"2026-08-22T19:49:40.695093+00:00","tier_text":"hub"},"tier":"hub","role_counts":[{"context_role":"background","n":5}],"polarity_counts":[{"context_polarity":"background","n":4},{"context_polarity":"support","n":1}],"runs":{},"summary":{},"graph":{},"authors":[]}}