4 papers
Quantum oscillations in the zeroth Landau Level and the serpentine Landau fan
T. Devakul, Yves H. Kwan, S. L. Sondhi +1
We identify an unusual mechanism for quantum oscillations in nodal semimetals, driven by a single pair of Landau levels periodically closing their gap at the Fermi energy as a magn…
Theory of competing excitonic orders in insulating WTe monolayers
Yves H. Kwan, T. Devakul, S. L. Sondhi +1
We develop a theory of the excitonic phase recently proposed as the zero-field insulating state observed near charge neutrality in monolayer WTe. Using a Hartree-Fock approxima…
Exciton band topology in spontaneous quantum anomalous Hall insulators: applications to twisted bilayer graphene
Yves H. Kwan, Yichen Hu, Steven H. Simon +1
We uncover topological features of neutral particle-hole pair excitations of correlated quantum anomalous Hall (QAH) insulators whose approximately flat conduction and valence band…
Twisted bilayer graphene in a parallel magnetic field
Yves H. Kwan, S. A. Parameswaran, S. L. Sondhi
We study the effect of an in-plane magnetic field on the non-interacting dispersion of twisted bilayer graphene. Our analysis is rooted in the chirally symmetric continuum model, w…