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Helical metals and insulators and sheet singularity of inflated Berry monopole
Habib Rostami, Emmanuele Cappelluti, Alexander V. Balatsky
We study the new phases of interacting Dirac matter that host novel Berry signatures. We predict a topological Lifshitz phase transition caused by the changes of a Dirac cone inter…
Band structure and electron-phonon coupling in HS:a tight-binding model
Luciano Ortenzi, Emmanuele Cappelluti, Luciano Pietronero
We present a robust tight-binding description, based on the Slater-Koster formalism, of the band structure of HS in the {\em Im}{\em m} structure, stable in the range…
Unconventional Hall effect in pnictides from interband interactions
L. Fanfarillo, E. Cappelluti, C. Castellani +1
We calculate the Hall transport in a multiband systems with a dominant interband interaction between carriers having electron and hole character. We show that this situation gives…
Phonon switching and combined Fano-Rice effect in optical spectra of bilayer graphene
E. Cappelluti, L. Benfatto, A. B. Kuzmenko
Recent infrared measurements of phonon peaks in gated bilayer graphene reveal two striking signatures of electron-phonon interaction: an asymmetric Fano lineshape and a giant varia…
Gate tunable charged-phonon effect in bilayer graphene
A. B. Kuzmenko, L. Benfatto, E. Cappelluti +5
We observe a giant increase of the infrared intensity and a softening of the in-plane antisymmetric phonon mode Eu (~0.2 eV) in bilayer graphene as a function of the gate-induced d…
Polaronic signatures in the optical properties of NdCeCuO
E. Cappelluti, S. Ciuchi, S. Fratini
We investigate the temperature and doping dependence of the optical conductivity of NdCeCuO in terms of magnetic/lattice polaron formation. We employ dynamic…