University of Birmingham > Talks@bham > Condensed Matter Physics Seminars > The art of seeing electrons and playing with their band structure

The art of seeing electrons and playing with their band structure

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  • UserDr. Federico Mazzola, Istituto Officina dei Materiali (IOM)-CNR, I-34149 Trieste, Italy
  • ClockFriday 02 December 2022, 14:00-15:00
  • HousePhysics East 217 (library).

If you have a question about this talk, please contact Dr Clifford W. Hicks.

After ‘the rise of graphene’ in 2007, the discovery of exotic topological phases has become the hinge of a revolutionary concept: The currents can be generated by using the electron spins. Such currents, the so-called spin currents, offer innumerable advantages compared to the classical ones: They are protected against disorder and can be transported without backscattering of carriers. This minimizes the power that allows the electronic devices to work, enabling technology to operate at a considerably lower switching energy. In this context, investigating and manipulating the spins of the electrons constitutes a unique opportunity to stabilize exotic phases of quantum matter which are currently beyond reach and to understand the ones which are still significantly unexplored.

Here, motivated by cold atoms experiment, I will show how we can use photoelectron spectroscopy to investigate the emergent concept of Berry phase and I will show a first proof of principle experiment on the emergent family of kagome systems. I will show how we can access the link between topology and curvature of the electronic structure and how this is relevant when samples are studied under the applications of stimuli, such as strain and pressure.

In doing this, I will guide the audience through the concept of topology and build a solid link between optical lattices and condensed matter, so that also non-experts in the field could get a flavour of this research.

This talk is part of the Condensed Matter Physics Seminars series.

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