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Non-Fermi-liquid behaviour of electrons coupled to gauge phonons
Rutvij Gholap, Alexey Ermakov, Alexander Kazantsev +3
We identify overdamped gauge phonons as a new microscopic route to non-Fermi-liquid behaviour in Dirac materials. These phonons couple to electronic currents rather than densities,…
Optical conductivity and damping of plasmons due to electron-electron interaction
Prachi Sharma, Alessandro Principi, Giovanni Vignale +1
We re-visit the issue of plasmon damping due to electron-electron interaction. The plasmon linewidth can related to the imaginary part of the charge susceptibility or, equivalently…
Manipulating non-abelian anyons of Kitaev quantum spin liquids with local magnetic fields
Haoran Wang, Alessandro Principi
Non-abelian anyonic excitations of quantum spin liquids have potential for application to topological quantum computation, but designing logical operations requires developing prot…
Wannier Topology and Quadrupole Moments for a generalized Benalcazar-Bernevig-Hughes Model
Liu Yang, Alessandro Principi, Niels R. Walet
We analyze a special separable and chiral-symmetric model with a quantized quadrupole moment, extending the Benalcazar-Bernevig-Hughes model [Science 357, 61 (2017)]. Using nested-…
Emergent Hyper-Magic Manifold in Twisted Kitaev Bilayers
Samuel Haskell, Alessandro Principi
Kitaev quantum spin liquids have been the focus of intense research effort thanks to the discovery of various materials (e.g., RuCl3) that approximate their intriguing physics. In…
Optical conductivity of a Dirac-Fermi liquid
Prachi Sharma, Alessandro Principi, Dmitrii L. Maslov
A Dirac-Fermi liquid (DFL)--a doped system with Dirac spectrum--is an important example of a non-Galilean-invariant Fermi liquid (FL). Real-life realizations of a DFL include, e.g.…
Majorana corner states in square and Kagome quantum spin liquids
Haoran Wang, Alessandro Principi
Quantum spin liquids hosting Majorana excitations have recently experienced renewed interest for potential applications to topological quantum computation. Performing logical opera…
Quasiparticle Mass Enhancement and Fermi Surface Shape Modification in Oxide Two-Dimensional Electron Gases
John R. Tolsma, Alessandro Principi, Reza Asgari +2
We propose a model intended to qualitatively capture the electron-electron interaction physics of two-dimensional electron gases formed near transition-metal oxide heterojunctions…
Negative local resistance caused by viscous electron backflow in graphene
D. A. Bandurin, I. Torre, R. Krishna Kumar +10
Graphene hosts a unique electron system in which electron-phonon scattering is extremely weak but electron-electron collisions are sufficiently frequent to provide local equilibriu…
Theory of Coulomb drag for massless Dirac fermions
M. Carrega, T. Tudorovskiy, A. Principi +2
Coulomb drag between two unhybridized graphene sheets separated by a dielectric spacer has recently attracted considerable theoretical interest. We first review, for the sake of co…
Linear response of doped graphene sheets to vector potentials
A. Principi, Marco Polini, G. Vignale
A two-dimensional gas of massless Dirac fermions (MDFs) is a very useful model to describe low-energy electrons in monolayer graphene. Because the MDF current operator is directly…