• Xiao, D., Chang, M.-C. & Niu, Q. Berry phase effects on electronic properties. Rev. Mod. Phys. 82, 1959–2007 (2010).

    Article 
    ADS 
    MathSciNet 

    Google Scholar
     

  • Zhang, F., Jung, J., Fiete, G. A., Niu, Q. & MacDonald, A. H. Spontaneous quantum Hall states in chirally stacked few-layer graphene systems. Phys. Rev. Lett. 106, 156801 (2011).

    Article 
    ADS 

    Google Scholar
     

  • Min, H., Borghi, G., Polini, M. & MacDonald, A. H. Pseudospin magnetism in graphene. Phys. Rev. B 77, 041407 (2008).

    Article 
    ADS 

    Google Scholar
     

  • Zhang, F., Sahu, B., Min, H. & MacDonald, A. H. Band structure of ABC-stacked graphene trilayers. Phys. Rev. B 82, 035409 (2010).

    Article 
    ADS 

    Google Scholar
     

  • Zhou, H. et al. Half- and quarter-metals in rhombohedral trilayer graphene. Nature 598, 429–433 (2021).

    Article 
    ADS 

    Google Scholar
     

  • Zhou, H. et al. Isospin magnetism and spin-polarized superconductivity in Bernal bilayer graphene. Science 375, 774–778 (2022).

    Article 
    ADS 

    Google Scholar
     

  • Han, T. et al. Correlated insulator and Chern insulators in pentalayer rhombohedral-stacked graphene. Nat. Nanotechnol. 19, 181–187 (2024).

    Article 
    ADS 

    Google Scholar
     

  • Liu, K. et al. Spontaneous broken-symmetry insulator and metals in tetralayer rhombohedral graphene. Nat. Nanotechnol. 19, 188–195 (2024).

    Article 
    ADS 

    Google Scholar
     

  • Sha, Y. et al. Observation of a Chern insulator in crystalline ABCA-tetralayer graphene with spin-orbit coupling. Science 384, 414–419 (2024).

    Article 
    ADS 

    Google Scholar
     

  • Han, T. et al. Orbital multiferroicity in pentalayer rhombohedral graphene. Nature 623, 41–47 (2023).

    Article 
    ADS 

    Google Scholar
     

  • Zhou, H., Xie, T., Taniguchi, T., Watanabe, K. & Young, A. F. Superconductivity in rhombohedral trilayer graphene. Nature 598, 434–438 (2021).

    Article 
    ADS 

    Google Scholar
     

  • Holleis, L. et al. Nematicity and orbital depairing in superconducting Bernal bilayer graphene. Nat. Phys. 21, 444–450 (2025).

    Article 

    Google Scholar
     

  • Zhang, Y. et al. Twist-programmable superconductivity in spin–orbit-coupled bilayer graphene. Nature 641, 625–631 (2025).

    Article 
    ADS 

    Google Scholar
     

  • Patterson, C. L. et al. Superconductivity and spin canting in spin–orbit-coupled trilayer graphene. Nature 641, 632–638 (2025).

    Article 
    ADS 

    Google Scholar
     

  • Kumar, M. et al. Superconductivity from dual-surface carriers in rhombohedral graphene. Nat. Phys. 22, 862–869 (2026).

    Article 

    Google Scholar
     

  • Qin, P. et al. Stripe order in the metallic and superconducting phases of rhombohedral hexalayer graphene. Preprint at https://doi.org/10.48550/arXiv.2504.05129 (2025).

  • Li, C. et al. Tunable superconductivity in electron- and hole-doped Bernal bilayer graphene. Nature 631, 300–306 (2024).

    Article 
    ADS 

    Google Scholar
     

  • Choi, Y. et al. Superconductivity and quantized anomalous Hall effect in rhombohedral graphene. Nature 639, 342–347 (2025).

    Article 
    ADS 

    Google Scholar
     

  • Morissette, E., Qin, P., Watanabe, K., Taniguchi, T. & Li, J. I. A. Evidence of momentum space condensation in rhombohedral hexalayer graphene. Preprint at https://doi.org/10.48550/arXiv.2503.09954 (2025).

  • Han, T. et al. Large quantum anomalous Hall effect in spin-orbit proximitized rhombohedral graphene. Science 384, 647–651 (2024).

    Article 
    ADS 

    Google Scholar
     

  • Lu, Z. et al. Extended quantum anomalous Hall states in graphene/hBN moiré superlattices. Nature 637, 1090–1095 (2025).

    Article 
    ADS 

    Google Scholar
     

  • Xie, J. et al. Tunable fractional Chern insulators in rhombohedral graphene superlattices. Nat. Mater. 24, 1042–1048 (2025).

    Article 

    Google Scholar
     

  • Lu, Z. et al. Fractional quantum anomalous Hall effect in multilayer graphene. Nature 626, 759–764 (2024).

    Article 
    ADS 

    Google Scholar
     

  • Han, T. et al. Signatures of chiral superconductivity in rhombohedral graphene. Nature 643, 654–661 (2025).

    Article 
    ADS 

    Google Scholar
     

  • Bernevig, B. A., Hughes, T. L. & Zhang, S.-C. Quantum spin Hall effect and topological phase transition in HgTe quantum wells. Science 314, 1757–1761 (2006).

    Article 
    ADS 

    Google Scholar
     

  • König, M. et al. Quantum spin Hall insulator state in HgTe quantum wells. Science 318, 766–770 (2007).

    Article 
    ADS 

    Google Scholar
     

  • Jérome, D., Rice, T. M. & Kohn, W. Excitonic insulator. Phys. Rev. 158, 462–475 (1967).

    Article 
    ADS 

    Google Scholar
     

  • MacDonald, A. H., Jung, J. & Zhang, F. Pseudospin order in monolayer, bilayer and double-layer graphene. Phys. Scr. 2012, 014012 (2012).

    Article 

    Google Scholar
     

  • Weitz, R. T., Allen, M. T., Feldman, B. E., Martin, J. & Yacoby, A. Broken-symmetry states in doubly gated suspended bilayer graphene. Science 330, 812–816 (2010).

    Article 
    ADS 

    Google Scholar
     

  • Shi, Y. et al. Electronic phase separation in multilayer rhombohedral graphite. Nature 584, 210–214 (2020).

    Article 
    ADS 

    Google Scholar
     

  • Liao, W.-Y. et al. Intervalley coherent order in rhombohedral tetralayer graphene on MoS2. Phys. Rev. Lett. 135, 046202 (2025).

    Article 
    ADS 

    Google Scholar
     

  • Liu, Y. et al. Visualizing incommensurate inter-valley coherent states in rhombohedral trilayer graphene. Preprint at https://doi.org/10.48550/arXiv.2411.11163 (2024).

  • Allender, D., Bray, J. & Bardeen, J. Model for an exciton mechanism of superconductivity. Phys. Rev. B 7, 1020–1029 (1973).

    Article 
    ADS 

    Google Scholar
     

  • Kohn, W. & Luttinger, J. M. New mechanism for superconductivity. Phys. Rev. Lett. 15, 524–526 (1965).

    Article 
    ADS 
    MathSciNet 

    Google Scholar
     

  • Lui, C. H. et al. Imaging stacking order in few-layer graphene. Nano Lett. 11, 164–169 (2011).

    Article 
    ADS 

    Google Scholar
     

  • Li, H. et al. Electrode-free anodic oxidation nanolithography of low-dimensional materials. Nano Lett. 18, 8011–8015 (2018).

    Article 
    ADS 

    Google Scholar
     

  • Wang, L. et al. One-dimensional electrical contact to a two-dimensional material. Science 342, 614–617 (2013).

    Article 
    ADS 

    Google Scholar
     

  • Dong, J. et al. Anomalous Hall crystals in rhombohedral multilayer graphene. I. Interaction-driven Chern bands and fractional quantum Hall states at zero magnetic field. Phys. Rev. Lett. 133, 206503 (2024).

    Article 
    ADS 

    Google Scholar
     

  • Zhang, L. et al. Comprehensive investigation of quantum oscillations in semimetal using an a.c. composite magnetoelectric technique with ultrahigh sensitivity. npj Quantum Mater. 9, 11 (2024).

    Article 
    ADS 

    Google Scholar