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|Abstract:||We study the electron-phonon coupling in twisted bilayer graphene (TBG), which was recently experimentally observed to exhibit superconductivity around the magic twist angle theta approximate to 1.05 degrees We show that phonon-mediated electron attraction at the magic angle is strong enough to induce a conventional intervalley pairing between graphene valleys K and K’ with a superconducting critical temperature T-c similar to 1 K, in agreement with the experiment. We predict that superconductivity can also be observed in TBG at many other angles 9 and higher electron densities in higher moire bands, which may also explain the possible granular superconductivity of highly oriented pyrolytic graphite. We support our conclusions by ab initio calculations.|
|Electronic Publication Date:||28-Jun-2019|
|Citation:||Lian, Biao, Wang, Zhijun, Bernevig, B Andrei. (2019). Twisted Bilayer Graphene: A Phonon-Driven Superconductor. PHYSICAL REVIEW LETTERS, 122, doi:10.1103/PhysRevLett.122.257002|
|Type of Material:||Journal Article|
|Journal/Proceeding Title:||PHYSICAL REVIEW LETTERS|
|Version:||Final published version. Article is made available in OAR by the publisher's permission or policy.|
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