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Revealing the conduction band and pseudovector potential in 2D moiré semiconductors
Abigail J. Graham, Heonjoon Park, Paul V. Nguyen +12
Stacking monolayer semiconductors results in moiré patterns that host many correlated and topological electronic phenomena, but measurements of the basic electronic structure under…
Extrinsic nonlinear Kerr rotation in topological materials under a magnetic field
Shuang Wu, Zaiyao Fei, Zeyuan Sun +10
Topological properties in quantum materials are often governed by symmetry and tuned by crystal structure and external fields, and hence symmetry-sensitive nonlinear optical measur…
Visualizing moiré ferroelectricity via plasmons and nano-photocurrent in graphene/twisted-WSe2 structures
Shuai Zhang, Yang Liu, Zhiyuan Sun +28
Ferroelectricity, a spontaneous and reversible electric polarization, is found in certain classes of van der Waals (vdW) material heterostructures. The discovery of ferroelectricit…
Observation of Fractionally Quantized Anomalous Hall Effect
Heonjoon Park, Jiaqi Cai, Eric Anderson +17
The integer quantum anomalous Hall (QAH) effect is a lattice analog of the quantum Hall effect at zero magnetic field. This striking transport phenomenon occurs in electronic syste…
Magnetotransport on quantum spin Hall edge coupled to bulk midgap states
Youjian Chen, Wenjin Zhao, Elliott Runburg +2
We consider magnetotransport on a helical edge of a quantum spin Hall insulator, in the presence of bulk midgap states ``side-coupled" to the edge. In the presence of a magnetic fi…