Condensed Matter Journal Club: "Crystalline-electromagnetic response of topological semimetals"
- Event Type
- Seminar/Symposium
- Sponsor
- Condensed Matter Journal Club
- Location
- Loomis 276
- Date
- Oct 17, 2023 2:00 pm
- Speaker
- Alexander Gray (UIUC)
- Contact
- Jacopo Gliozzi
- jglioz2@illinois.edu
- Views
- 53
- Originating Calendar
- Physics - Condensed Matter Journal Club
Topological responses such as the integer quantum Hall effect provide a concrete manifestation of topology in electronic systems. Beyond electromagnetic response phenomena, electrons can also respond to deformations of the underlying crystal lattice. In this talk, I will discuss the structure of effective actions describing the combined crystalline-electromagnetic response of semimetals. I will motivate this by first considering the well-studied electromagnetic response of strong topological insulators, then coupling these systems to a gauge field that captures the underlying crystalline symmetry. I will then present a lattice model which realizes two of the response actions to demonstrate their validity. Lastly, I will discuss a subtlety of the crystalline response which points toward future work.