9 papers
Fundamental limitations of single-particle Green's-function zeroes as probes of many-body topology
Emile Pangburn, Olivier Gingras
We show that topological invariants constructed from single-particle Green's functions (GFs) cannot reliably diagnose the topology of interacting many-body states. Using coupled in…
Correlated Mott semi-metal in the topological heavy fermion model
Emile Pangburn, Igor de Melo Froldi, Anurag Banerjee
The topological heavy-fermion model provides a minimal framework for describing the coexistence of localized moments and itinerant Dirac electrons in magic-angle twisted bilayer gr…
Quasiparticle interference and spectral function of the UTe superconductive surface band
Adeline Crépieux, Emile Pangburn, Shuqiu Wang +7
We compute the (0-11) surface spectral function, the surface density of states (DOS), and the quasiparticle interference (QPI) patterns, both in the normal state and superconductin…
Topological charge excitations and Green's function zeros in paramagnetic Mott insulators
Emile Pangburn, Catherine Pépin, Anurag Banerjee
We investigate the emergence of topological features in the charge excitations of Mott insulators in the Chern-Hubbard model. In the strong correlation regime, treating electrons a…
Odd-Parity Quasiparticle Interference in the Superconductive Surface State of UTe2
Shuqiu Wang, Kuanysh Zhussupbekov, Joseph P. Carroll +13
Although no known material exhibits intrinsic topological superconductivity, wherein spin-triplet odd-parity electron pairing occurs, UTe2 is now the leading representative of this…
Probing quasiparticle excitations in a doped Mott insulator via Friedel oscillations
Anurag Banerjee, Emile Pangburn, Catherine Pépin +1
In this work, we investigate impurity-induced Friedel oscillations in the doped two-dimensional Hubbard model, focusing on the role of holon and doublon excitations. We show that w…