88 citations · 461 across the 35 of their papers we have counts for
8 papers · 1 filter
Quasiparticle picture of topological phase transitions induced by interactions
S. S. Krishtopenko, A. V. Ikonnikov, F. Hartmann +3
We present a general recipe to describe topological phase transitions in condensed matter systems with interactions. We show that topological invariants in the presence of interact…
Roles of band gap and Kane electronic dispersion in the THz-frequency nonlinear optical response in HgCdTe
Davide Soranzio, Elsa Abreu, Sarah Houver +7
Materials with linear electronic dispersion often feature high carrier mobilities and unusually strong nonlinear optical interactions. In this work, we investigate the THz nonlinea…
Temperature Dependent Zero-Field Splittings in Graphene
C. Bray, K. Maussang, C. Consejo +15
Graphene is a quantum spin Hall insulator with a 45 eV wide non-trivial topological gap induced by the intrinsic spin-orbit coupling. Even though this zero-field spin splitting…
Disorder-induced topological phase transition in HgCdTe crystals
Sergey S. Krishtopenko, Mauro Antezza, Frédéric Teppe
Using the self-consistent Born approximation, we study a topological phase transition appearing in bulk HgCdTe crystals induced \emph{uncorrelated} disorder due to both randomly di…
Relativistic collapse of Landau levels of Kane fermions in crossed electric and magnetic fields
Sergey S. Krishtopenko, Frédéric Teppe
Using an elegant model involving only and bands, massless Kane fermions were defined as the particles associated with the peculiar band structure of gapless HgCdT…
Large gap quantum spin Hall insulator, massless Dirac fermions and bilayer graphene analogue in InAs/Ga(In)Sb heterostructures
S. S. Krishtopenko, F. Teppe
The quantum spin Hall insulator (QSHI) state has been demonstrated in two semiconductor systems - HgTe/CdTe quantum wells (QWs) and InAs/GaSb QW bilayers. Unlike the HgTe/CdTe QWs,…