8 papers
Symmetry and Quantum Geometry in Bloch Bands
Ziwei Wang, Charlie Raca, Steven H. Simon
Quantum geometric quantities have featured heavily in the discussion of the properties of quantum systems in recent years. Among quantities most commonly discussed is the variance…
Engineering electrically-switchable quantum anomalous Hall states by spin-orbit coupling
Maosen Qin, Ziwei Wang, Gyeongmin Kim +5
Nonvolatile gate-driven switching of quantum anomalous Hall (QAH) states in graphene moiré systems provides a promising route toward topological electronics based on chiral edge s…
Does a Fractional Quantum Hall Edge Have a Protected Intrinsic Dipole Moment?
Domagoj PerkoviÄ, Konstantinos Vasiliou, S. A. Parameswaran +1
We investigate the claims by Park and Haldane [Phys. Rev. B 90, 045123 (2014)] of an intrinsic protected value of the electric dipole moment at the physical edge of fractional quan…
Mean-field Modelling of Moiré Materials: A User's Guide with Selected Applications to Twisted Bilayer Graphene
Yves H. Kwan, Ziwei Wang, Glenn Wagner +3
We review the theoretical modelling of moiré materials, focusing on various aspects of magic-angle twisted bilayer graphene (MA-TBG) viewed through the lens of Hartree-Fock mean-f…
Quantum Hall Antidot as a Fractional Coulombmeter
Mario Di Luca, Emily Hajigeorgiou, Zekang Zhou +6
The detection of fractionally charged quasiparticles, which arise in the fractional quantum Hall regime, is of fundamental importance for probing their exotic quantum properties. W…
Putting a new spin on the incommensurate Kekulé spiral: from spin-valley locking and collective modes to fermiology and implications for superconductivity
Ziwei Wang, Glenn Wagner, Yves H. Kwan +3
We revisit the global phase diagram of magic-angle twisted bilayer and [symmetric] trilayer graphene (MA-TBG/TSTG) in light of recent scanning tunneling microscopy (STM) measuremen…