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N09: Magnetic Phenomena in Rhombohedral Graphene


Sponsoring Units: DCMP,GMAGChair: Salvador Barraza-Lopez, University of Arkansas

Wed. March 6, 12:18 p.m. – 12:30 p.m. CST


Bernal bilayer graphene (BLG) coupled to tungsten diselenide (WSe2) features an extraordinary order-of-magnitude enhancement in superconducting Tc and establishes an ultra-clean platform for exploring various correlated ground states. Here, we show that by controlling the interfacial twist angle between BLG and WSe2, the proximitized spin-orbit coupling (SOC) as well as overall BLG phase diagram can be tuned. We map out the superconducting regions and find that superconductivity exhibits a higher Tc and onsets at higher displacement fields when Ising SOC is increased. Moreover, we discover multiple superconducting regions emerging from various broken-symmetry parent phases. By carefully mapping quantum oscillations, we further establish the dependence of nematic broken flavor symmetry on doping and the Ising strength. Our results pave the way for a detailed understanding of unconventional pairing in graphene superconductors.

Presented By

  • Yiran Zhang (California Institute of Technology)


  • Yiran Zhang (California Institute of Technology)
  • Gal Shavit (California Institute of Technology)
  • Etienne Lantagne-Hurtubise (Caltech)
  • Alex Thomson (Caltech)
  • Cyprian K Lewandowski (Florida State University)
  • Kenji Watanabe (National Institute for Materials Science)
  • Takashi Taniguchi (Kyoto Univ)
  • Jason F Alicea (Caltech)
  • Felix von Oppen (Berlin)
  • Yuval Oreg (Weizmann Institute of Science)
  • Stevan Nadj-Perge (Caltech)