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Thickness and twist angle dependent interlayer excitons in metal monochalcogenide heterostructures
Wenkai Zheng, Li Xiang, Felipe de Quesada +18
Interlayer excitons, or bound electron-hole pairs whose constituent quasiparticles are located in distinct stacked semiconducting layers, are being intensively studied in heterobil…
Symmetric Wannier states and tight-binding model for quantum spin Hall bands in AB-stacked MoTe/WSe
Xun-Jiang Luo, Minxuan Wang, Fengcheng Wu
Motivated by the observation of topological states in AB-stacked MoTe/WSe, we construct the symmetry-adapted Wannier states and tight-binding model for the quantum spin Hal…
Pair density wave and loop current promoted by van Hove singularities in moiré systems
Zhengzhi Wu, Yi-ming Wu, Fengcheng Wu
We theoretically show that in the presence of conventional or higher order van Hove singularities(VHS), the bare finite momentum pairing, also known as the pair density wave (PDW),…
Nematic excitonic insulator in transition metal dichalcogenide moiré heterobilayers
Ming Xie, Haining Pan, Fengcheng Wu +1
We study the effect of inter-electron Coulomb interactions on the displacement field induced topological phase transition in transition metal dichalcogenide (TMD) moiré heterobilay…
Enhanced superconductivity through virtual tunneling in Bernal bilayer graphene coupled to WSe
Yang-Zhi Chou, Fengcheng Wu, Sankar Das Sarma
Motivated by a recent experiment [arXiv:2205.05087], we investigate a possible mechanism that enhances superconductivity in hole-doped Bernal bilayer graphene due to a proximate WS…
Phonon-limited resistivity of multilayer graphene systems
Seth M. Davis, Sage B. Brooks, Yang-Zhi Chou +2
We calculate the theoretical contribution to the doping and temperature () dependence of electrical resistivity due to scattering by acoustic phonons in Bernal bilayer graphene…
Symmetry breaking and anomalous conductivity in a double moiré superlattice
Yuhao Li, Minmin Xue, Hua Fan +13
A double moiré superlattice can be realized by stacking three layers of atomically thin two-dimensional materials with designer interlayer twisting or lattice mismatches. In this n…
Acoustic-phonon-mediated superconductivity in moiréless graphene multilayers
Yang-Zhi Chou, Fengcheng Wu, Jay D. Sau +1
We investigate the competition between acoustic-phonon-mediated superconductivity and the long-range Coulomb interaction in moiréless graphene multilayers, specifically, Bernal bil…
Tailoring Dirac fermions by in-situ tunable high-order moire pattern in graphene-monolayer xenon heterostructure
Chunlong Wu, Qiang Wan, Cao Peng +8
A variety of novel quantum phases have been achieved in twist bilayer graphene (tBLG) and other moire superlattices recently, including correlated insulators, superconductivity, ma…
Pomeranchuk Effect and Tunable Quantum Phase Transitions in 3L-MoTe2/WSe2
Mingjie Zhang, Xuan Zhao, Kenji Watanabe +5
Many sought-after exotic states of matter are known to emerge close to quantum phase transitions, such as quantum spin liquids (QSL) and unconventional superconductivity. It is thu…
Strange metallicity of moiré twisted bilayer graphene
Sankar Das Sarma, Fengcheng Wu
Recent measurements in several different laboratories report the observation of an approximately linear-in-temperature resistivity with a large twist-angle-dependent slope (or temp…
Prediction of ferroelectric superconductors with reversible superconducting diode effect
Baoxing Zhai, Bohao Li, Yao Wen +2
A noncentrosymmetric superconductor can have a superconducting diode effect, where the critical current in opposite directions is different when time-reversal symmetry is also brok…