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Theory of optical absorption by interlayer excitons in transition metal dichalcogenide heterobilayers
Fengcheng Wu, Timothy Lovorn, A. H. MacDonald
We present a theory of optical absorption by interlayer excitons in a heterobilayer formed from transition metal dichalcogenides. The theory accounts for the presence of small rela…
Collective modes of Dirac and Weyl semimetals in strong magnetic fields
John R. Tolsma, Fengcheng Wu, Allan H. MacDonald
Dirac and Weyl semimetals provide a new example of three-dimensional electron gases which are sensitive to strong magnetic fields. In this paper we address their collective excitat…
Nematic and chiral superconductivity induced by odd-parity fluctuations
Fengcheng Wu, Ivar Martin
Recent experiments indicate that superconductivity in BiSe intercalated with Cu, Nb or Sr is nematic with rotational symmetry breaking. Motivated by this observation, we pr…
Majorana Kramers pair in a nematic vortex
Fengcheng Wu, Ivar Martin
A time-reversal (TR) invariant topological superconductor is characterized by a Kramers pair of Majorana zero-energy modes on boundaries and in a core of a TR invariant vortex. A v…