Journal
PHYSICAL REVIEW LETTERS
Volume 122, Issue 25, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.122.257002
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Funding
- Princeton Center for Theoretical Science at Princeton University
- CAS Pioneer Hundred Talents Program
- Department of Energy [DE-SC0016239]
- National Science Foundation EAGER [DMR 1643312, 404513]
- ONR [N00014-14-1-0330]
- NSF-MRSEC [DMR-142051]
- Packard Foundation
- Schmidt Fund for Innovative Research
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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.
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