35 citations · 116 across the 14 of their papers we have counts for
15 papers
Exciton superfluidity in two-dimensional bilayers at zero and high magnetic fields
Sankar Das Sarma, Yang-Zhi Chou
We study interlayer exciton superfluidity versus layer separation in two-dimensional electron-hole bilayers at zero magnetic field and quantum Hall bilayers at total filling $ν_T=1…
Magnetic Breakdown and Anomalous Quantum Oscillation in Rhombohedral Tetralayer Graphene
Jing-Yu Zhao, Yang-Zhi Chou, Sankar Das Sarma
We investigate magnetic breakdown near Van Hove singularities (VHSs) in the electron-doped rhombohedral tetralayer graphene, where chiral superconductivity has recently been report…
Stripe-tuned superconductivity in single-flavor metals with nontrivial quantum geometry
Yi-Ting Tu, Yang-Zhi Chou, Yi Huang +1
We study how the interplay between nontrivial quantum geometry and an applied stripe potential affects superconductivity in a two-dimensional single-flavor metal. Assuming a weak c…
Symmetric localization of fractional topological insulator edges
Yang-Zhi Chou, Sankar Das Sarma
Motivated by the recent twisted MoTe experiment [arXiv:2601.18508], we develop a disordered interacting edge theory of a fractional topological insulator at $ν_{\text{tot}}=4/3…
Superconductivity from phonon-mediated retardation in a single-flavor metal
Yang-Zhi Chou, Jihang Zhu, Jay D. Sau +1
We study phonon-mediated pairings in a single-flavor metal with a tunable Berry curvature. In the absence of Berry curvature, we discover an unexpected possibility: -wave superc…
Spin ladder quantum simulators from spin-orbit-coupled quantum dot spin qubits
Yang-Zhi Chou, Sankar Das Sarma
Motivated by the recent Ge hole spin qubit experiments, we construct and study a two-leg spin ladder from a quantum dot array with spin-orbit couplings (SOCs), aiming to uncover th…
Perturbative renormalization group approach to magic-angle twisted bilayer graphene using topological heavy fermion model
Yi Huang, Yang-Zhi Chou, Sankar Das Sarma
We develop a perturbative renormalization group (RG) theory for the topological heavy fermion (THF) model, describing magic-angle twisted bilayer graphene (MATBG) as an emergent An…
Apparent inconsistency between Streda formula and Hall conductivity in reentrant integer quantum anomalous Hall effect in twisted MoTe
Yi Huang, Seth Musser, Jihang Zhu +2
Recent experiments in twisted bilayer MoTe (tMoTe) have uncovered a rich landscape of correlated phases. In this work, we investigate the reentrant integer quantum anomalou…
In-plane magnetic field-induced orbital FFLO superconductivity in twisted WSe homobilayers
Jihang Zhu, Yang-Zhi Chou, Yi Huang +1
We theoretically predict the in-plane magnetic field-induced orbital Fulde-Ferrell-Larkin-Ovchinnikov (FFLO) superconducting states in twisted WSe homobilayers (tWSe), focu…
Intravalley spin-polarized superconductivity in rhombohedral tetralayer graphene
Yang-Zhi Chou, Jihang Zhu, Sankar Das Sarma
We study the intravalley spin-polarized superconductivity in rhombohedral tetralayer graphene, which has been discovered experimentally in Han arXiv:2408.15233. We constr…
Superconductivity in twisted transition metal dichalcogenide homobilayers
Jihang Zhu, Yang-Zhi Chou, Ming Xie +1
For the first time, robust superconductivity has been independently observed in twisted WSe bilayers by two separate groups [Y. Xia et al., arXiv:2405.14784; Y. Guo et al., arX…
Topological phases, van Hove singularities, and spin texture in magic-angle twisted bilayer graphene in the presence of proximity-induced spin-orbit couplings
Yuting Tan, Yang-Zhi Chou, Fengcheng Wu +1
We investigate magic-angle twisted bilayer graphene (MATBG) with proximity-induced Ising and Rashba spin-orbit couplings (SOC) in the top layer, as recently achieved experimentally…
Composite helical edges from Abelian fractional topological insulators
Yang-Zhi Chou, Sankar Das Sarma
We study an interacting composite Abelian helical edge state made of a regular helical liquid carrying charge and a (fractionalized) helical liquid carrying charge $e…
Topological flat bands, valley polarization, and interband superconductivity in magic-angle twisted bilayer graphene with proximitized spin-orbit couplings
Yang-Zhi Chou, Yuting Tan, Fengcheng Wu +1
We study theoretically the magic-angle twisted bilayer graphene with proximity-induced Ising and Rashba spin-orbit couplings on the top layer. Topological flat bands (with three di…
Mott-moiré excitons
T. -S. Huang, Yang-Zhi Chou, C. L. Baldwin +2
We develop a systematic theory for excitons subject to Fermi-Hubbard physics in moiré twisted transition metal dichalcogenides (TMDs). Specifically, we consider excitons in moiré s…