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HL: Fachverband Halbleiterphysik

HL 20: Topological insulators 2 (MA, jointly with HL, O, TT)

HL 20.9: Vortrag

Montag, 11. März 2013, 17:30–17:45, H10

Strongly-correlated topological semiconductors — •Stanislav Chadov¹, Claudia Felser¹, Leon Petit², Hubert Ebert³, and Jan Minár³ — ¹MPI-CPFS Dresden — ²STFC Daresbury Laboratory, UK — ³LMU München

Using the fully-relativistic Green’s function formalism we analyze the electronic structure topology in series of the heavy rock-salt type semiconductors PuX, SmX (X=Te, Se, S). Due to the partial filling of their f-shells, these materials exhibit strong dynamical correlations which destroy the Bloch-like eigenstates. Thus, the usual analysis based on the symmetry of the eigenstates cannot be applied. Here we recall the adiabatic approach, which allows to analyze the topology based on a purely bulk information disregarding the Bloch or localized character of the electronic states. The dynamical correlations were treated within the DMFT scheme implemented in the framework of the SPR-KKR Green’s function method.