Symmetry-broken metallic orders in spin-orbit-coupled Bernal bilayer graphene
Abstract
We explore Bernal bilayer graphene in the presence of long-range Coulomb interactions, short-range Hund's coupling, and proximity-induced Ising spin-orbit coupling using self-consistent Hartree-Fock simulations. We show that the interplay between these three ingredients produces an intricate phase diagram comprising a multitude of symmetry-broken metallic states tunable via doping and applied displacement field. In particular, we find intervalley coherent and spin-canted ground states that may hold the key to understanding spin-orbit-enabled superconductivity observed in this platform. We also investigate various phase transitions where a continuous U(1) symmetry is broken to ascertain the possible role of critical fluctuations on pairing.
Copyright and License
© 2024 American Physical Society.
Acknowledgement
We are grateful to Z. Dong, C. Lewandowski, S. Nadj-Perge, G. Shavit, A. Young, and Y. Zhang for insightful discussions and collaborations on related projects. J.M.K. is grateful for support from the Agency for Science, Technology and Research (A*STAR) Graduate Academy, Singapore. A.T. acknowledges support from the National Science Foundation under Grant No. 2341066. É.L.-H. was supported by the Gordon and Betty Moore Foundation's EPiQS Initiative, Grant No. GBMF8682. The U.S. Department of Energy, Office of Science, National Quantum Information Science Research Centers, Quantum Science Center supported the high-performance computing as well as the symmetry analysis component of this work. Additional support was provided by the Caltech Institute for Quantum Information and Matter, an NSF Physics Frontiers Center (Grant No. PHY-2317110), and the Walter Burke Institute for Theoretical Physics at Caltech. This work was performed in part at the Aspen Center for Physics, which is supported by National Science Foundation Grant No. PHY-2210452.
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Additional details
- Agency for Science, Technology and Research
- National Science Foundation
- DMR-2341066
- Gordon and Betty Moore Foundation
- GBMF8682
- United States Department of Energy
- National Science Foundation
- PHY-2317110
- National Science Foundation
- PHY-2210452
- Accepted
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2024-11-18Accepted
- Caltech groups
- Institute for Quantum Information and Matter, Walter Burke Institute for Theoretical Physics
- Publication Status
- Published