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Linear terahertz response of semiconductor nanostructures
Šándor, Jindřich ; Ostatnický, Tomáš (advisor) ; Němec, Hynek (referee)
In this work we study an interaction between electrons in Dirac points and terahertz electromagnetic radiation. First, we find eigenstates of the effective hamiltonian in Dirac points. Then we introduce the interaction Hamiltonian and subsequently we find an evo- lution relation for a density matrix in the first order of perturbation theory. Eventually we derive matrix elements of a conductivity tensor. We do all this in two different gauges of an electromagnetic potential. 1

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