275 citations · 423 across the 12 of their papers we have counts for
12 papers
Topological excitonic insulators in electron bilayers modulated by twisted hBN
Yongxin Zeng, Allan H. MacDonald, Nemin Wei
Equilibrium interlayer exciton condensation is common in bilayer quantum Hall systems and is characterized by spontaneous phase coherence between isolated layers. It has been predi…
Emergent Trion Resonance Driven by Lattice Reconstruction in a Moiré Superlattice
Zhida Liu, Haonan Wang, Xiaohui Liu +20
We investigate how many-electron excited states emerge in twisted MoSe2 homobilayers when the lattice reconstructions evolve. Notably, we identify a new trion resonance that arises…
Gate-tunable topological phases in superlattice modulated bilayer graphene
Yongxin Zeng, Tobias M. R. Wolf, Chunli Huang +4
Superlattice potential modulation can produce flat minibands in Bernal-stacked bilayer graphene. In this work we study how band topology and interaction-induced symmetry-broken pha…
Weak localization as a probe of intervalley coherence in graphene multilayers
Nemin Wei, Yongxin Zeng, A. H. MacDonald
Spontaneous intervalley coherence is suspected in several different graphene multilayer systems, but is difficult to confirm because of a paucity of convenient experimental signatu…
Electrical Control of Two-Dimensional Electron-Hole Fluids in the Quantum Hall Regime
Bo Zou, Yongxin Zeng, A. H. MacDonald +1
We study the influence of quantizing perpendicular magnetic fields on the ground state of a bilayer with electron and hole fluids separated by an opaque tunnel barrier. In the abse…
Thermodynamic behavior of correlated electron-hole fluids in van der Waals heterostructures
Ruishi Qi, Andrew Y. Joe, Zuocheng Zhang +12
Coupled two-dimensional electron-hole bilayers provide a unique platform to study strongly correlated Bose-Fermi mixtures in condensed matter. Electrons and holes in spatially sepa…
Layer Pseudospin Magnetism in Transition-Metal-Dichalcogenide Double-Moirés
Yongxin Zeng, Nemin Wei, Allan H. MacDonald
Spontaneous order of layer pseudospins in two-dimensional bilayers is common in quantum Hall systems, where it is responsible for hysteretic responses to gate fields in states with…
In-plane magnetic field induced density wave states near quantum spin Hall phase transitions
Yongxin Zeng, Fei Xue, Allan H. MacDonald
We study the influence of an in-plane magnetic field and Coulomb interactions on the physics of quantum spin Hall insulators, like those in InAs/GaSb and HgTe/CdTe quantum wells. U…
The strong modulation limit of excitons and trions in moiré materials
Yongxin Zeng, Allan H. MacDonald
The optical properties of weakly-doped two-dimensional materials are dominated by strong exciton and trion absorption and luminescence features. In this article we examine the infl…
Strongly correlated excitonic insulator in atomic double layers
Liguo Ma, Phuong X. Nguyen, Zefang Wang +6
Excitonic insulators (EI) arise from the formation of bound electron-hole pairs (excitons) in semiconductors and provide a solid-state platform for quantum many-boson physics. Stro…
Electrically Controlled Two-Dimensional Electron-Hole Fluids
Yongxin Zeng, A. H. MacDonald
We study the electronic properties of dual-gated electron-hole bilayers in which the two layers are separated by a perfectly opaque tunnel barrier. Combining an electrostatic and t…
The Quantum Anomalous Hall Majorana Platform
Yongxin Zeng, Chao Lei, Gaurav Chaudhary +1
We show that quasi-one-dimensional (1D) quantum wires can be written onto the surface of magnetic topological insulator (MTI) thin films by gate arrays. When the MTI is in a quantu…