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                            “Studying topological materials using Terahertz radiation “





 Monday, 26. Oct. 2015

Audio-only-Recording as MP3-File (smallest possible size):

       -   Audio.mp3   (ca.20 Mb)


Video-Recording for any system with MP4-support:

       -   Video.mp4   (ca.216 Mb)


 10:00 – 10:45


Abstract :


Topological insulators are an emerging class of quantum materials. These materials show experimental properties

similar to graphene, e.g. a low-energy electronic structure with Dirac fermion excitations, but in contrast to grapheme

with strong spin-orbit coupling. As a consequence topological (crystalline) insulators exhibit an inverted insulating

bulk band structure and conducting (gapless), symmetry-protected surface states with helical spin texture.

The subject matter of this talk is how Terahertz radiation can be used to study topological materials, such as e.g.

topological (crystalline) insulators. In this context Terahertz radiation can be an interesting probe because

characteristic energies of many elementary solid-state excitations are located in the Terahertz region

(0.24-24 THz, 1-100 meV) of the electromagnetic spectrum. 


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