Studying charge density wave systems and THz collective excitations with a meV atomic beam

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• Toni Tamtögl, Institute of Experimental Physics, Graz University of Technology, Austria
• Thursday 02 May 2019, 16:00-17:00
• Mott Seminar Room, Cavendish Laboratory.

If you have a question about this talk, please contact Stephen Walley.

Helium atom scattering (HAS) provides access to the low-energy meV region of surface vibrational modes and allows to study subtle effects such as the influence of van der Waals bonding. The ability of HAS to observe charge density waves (CDWs) – periodic modulations of the electron density – will be discussed. Examples include multivalley CDWs in Sb(111) and a CDW phase-transition in the one-dimensional topological metal Bi(114). Moreover, the experimental dispersion curves of the topological insulator Bi2Se3 reveal two additional branches, suggesting the presence of surface plasmons in the THz region.

This talk is part of the Physics and Chemistry of Solids Group series.

This talk is included in these lists:

• All Cavendish Laboratory Seminars
• All Talks (aka the CURE list)
• Centre for Health Leadership and Enterprise
• Featured lists
• ME Seminar
• Mott Seminar Room, Cavendish Laboratory
• Neurons, Fake News, DNA and your iPhone: The Mathematics of Information
• Physics and Chemistry of Solids Group
• School of Physical Sciences
• Thin Film Magnetic Talks

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