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1. Magic continuum in a twisted bilayer square lattice with staggered flux

   https://doi.org/10.1103/PhysRevB.104.035136  

   Luo, Zhu-Xi ; Xu, Cenke ; Jian, Chao-Ming ( July 2021 , Physical Review B)
2. XY* Transition and Extraordinary Boundary Criticality from Fractional Exciton Condensation in Quantum Hall Bilayer

   https://doi.org/10.1103/PhysRevX.13.031023  

   Zhang, Ya-Hui ; Zhu, Zheng ; Vishwanath, Ashvin ( September 2023 , Physical Review X)
3. Charge-order and broken rotational symmetry in magic angle twisted bilayer graphene

   https://doi.org/10.1038/s41586-019-1460-4  

   Jiang, Yuhang ; Lai, Xinyuan ; Watanabe, Kenji ; Taniguchi, Takashi ; Haule, Kristjan ; Mao, Jinhai ; Andrei, Eva Y. ( August 2019 , Nature)
4. Flat bands in twisted bilayer transition metal dichalcogenides

   https://doi.org/10.1038/s41567-020-0958-x  

   Zhang, Zhiming ; Wang, Yimeng ; Watanabe, Kenji ; Taniguchi, Takashi ; Ueno, Keiji ; Tutuc, Emanuel ; LeRoy, Brian J. ( January 2020 , Nature Physics)
5. Dirac revivals drive a resonance response in twisted bilayer graphene

   https://doi.org/10.1038/s41567-023-02060-0  

   Morissette, Erin ; Lin, Jiang-Xiazi ; Sun, Dihao ; Zhang, Liangji ; Liu, Song ; Rhodes, Daniel ; Watanabe, Kenji ; Taniguchi, Takashi ; Hone, James ; Pollanen, Johannes ; et al ( August 2023 , Nature Physics)

   Collective excitations contain key information regarding the electronic order of the ground state of strongly correlated systems. Various collective modes in the spin and valley isospin channels of magic-angle graphene moiré bands have been alluded to by a series of recent experiments. However, a direct observation of collective excitations has been impossible due to the lack of a spin probe. Here we observe low-energy collective excitations in twisted bilayer graphene near the magic angle, using a resistively detected electron spin resonance technique. Two independent observations show that the generation and detection of microwave resonance relies on the strong correlations within the flat moiré energy band. First, the onset of the resonance response coincides with the spontaneous flavour polarization at moiré half-filling, but is absent in the isospin unpolarized density range. Second, we perform the same measurement on various systems that do not have flat bands and observe no indication of a resonance response in these samples. Our explanation is that the resonance response near the magic angle originates from Dirac revivals and the resulting isospin order. 

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