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Observation of Moiré Flat Bands in Sonic Crystals
Tingzhi Liu, Xingjian Zhang, Qicheng Zhang +3
Recently, artificial moire superlattices of classical waves have aroused tremendous interest, inspired by the newly emergent twistronics that focuses on the peculiar electronic pro…
Topological Phases in AB-Stacked MoTe/WSe: Topological Insulators, Chern Insulators, and Topological Charge Density Waves
Haining Pan, Ming Xie, Fengcheng Wu +1
We present a theory on the quantum phase diagram of AB-stacked MoTe/WSe using a self-consistent Hartree-Fock calculation performed in the plane-wave basis, motivated by the…
Van der Waals Heterostructure Polaritons with moiré-Induced Nonlinearity
Long Zhang, Fengcheng Wu, Shaocong Hou +6
Controlling matter-light interactions with cavities is of fundamental importance in modern science and technology. It is exemplified in the strong-coupling regime, where matter-lig…
Acoustic-phonon-mediated superconductivity in Bernal bilayer graphene
Yang-Zhi Chou, Fengcheng Wu, Jay D. Sau +1
We present a systematic theory of acoustic-phonon-mediated superconductivity, which incorporates Coulomb repulsion, explaining the recent experiment in Bernal bilayer graphene unde…
Acoustic-phonon-mediated superconductivity in rhombohedral trilayer graphene
Yang-Zhi Chou, Fengcheng Wu, Jay D. Sau +1
Motivated by the observation of two distinct superconducting phases in the moiréless ABC-stacked rhombohedral trilayer graphene, we investigate the electron-acoustic-phonon couplin…
Spin-valley locked instabilities in moire transition metal dichalcogenides with conventional and higher-order Van Hove singularities
Yi-Ting Hsu, Fengcheng Wu, S. Das Sarma
Recent experiments have observed correlated insulating and possible superconducting phases in twisted homobilayer transition metal dichalcogenides (TMDs). Besides the spin-valley l…
Correlation-induced triplet pairing superconductivity in graphene-based moiré systems
Yang-Zhi Chou, Fengcheng Wu, Jay D. Sau +1
Motivated by the possible non-spin-singlet superconductivity in the magic-angle twisted trilayer graphene experiment, we investigate the triplet-pairing superconductivity arising f…
Temperature-linear Resistivity in Twisted Double Bilayer Graphene
Yanbang Chu, Le Liu, Cheng Shen +13
We report an experimental study of carrier density (n), displacement field (D) and twist angle (θ) dependence of temperature (T)-linear resistivity in twisted double bilayer graphe…
Charge density wave and finite-temperature transport in minimally twisted bilayer graphene
Yang-Zhi Chou, Fengcheng Wu, Jay D. Sau
We study phenomena driven by electron-electron interactions in the minimally twisted bilayer graphene (mTBLG) with a perpendicular electric field. The low-energy degrees of freedom…