172 citations · 542 across the 14 of their papers we have counts for
11 papers · 1 filter
Bootstrapping Bloch bands
Serguei Tchoumakov, Serge Florens
Bootstrap methods, initially developed for solving statistical and quantum field theories, have recently been shown to capture the discrete spectrum of quantum mechanical problems,…
Three-dimensional chiral Veselago lensing
Serguei Tchoumakov, Jérôme Cayssol, Adolfo G. Grushin
The effect by which light focuses upon entering a medium with a negative refractive index, known as Veselago lensing, may enable optical imaging below the diffraction limit. Simila…
Conservation of chirality at a junction between two Weyl semimetals
Serguei Tchoumakov, Bogusz Bujnowski, Jonathan Noky +3
In Weyl semimetals the location of linear band crossings, the Weyl cones, is not bound to any high symmetry point of the Brillouin zone, unlike the Dirac nodes in graphene. This fl…
Impurities in 3D quadratic band-touching Luttinger semimetals : Friedel and RKKY oscillations
Louis J. Godbout, Serguei Tchoumakov, William Witczak-Krempa
We investigate the response of 3D Luttinger semimetals to localized charge and spin impurities as a function of doping. The strong spin-orbit coupling of these materials strongly i…
Determination of the crystal field splitting energy in Cd3As2 using magnetooptics
G. Krizman, T. Schumann, S. Tchoumakov +4
Symmetry considerations are of extreme importance to the topological properties of crystals. A crystal field splitting δ yields Dirac nodes near the Brillouin zone center in Cd3As2…
Dielectric and electronic properties of three-dimensional Luttinger semimetals with a quadratic band touching
Serguei Tchoumakov, William Witczak-Krempa
Due to strong spin-orbit coupling, charge carriers in three-dimensional quadratic band touching Luttinger semimetals have non-trivial wavefunctions characterized by a pseudospin of…