| Tuesday 23 April 2024 | |
| Events for day: Tuesday 19 January 2021 |
| 14:00 - 15:00 Weekly Seminar HEPCo Group A Weyl Semimetal from AdS/CFT School PHYSICS Abstract: We construct a top-down holographic model of Weyl semimetal states from the AdS/CFT correspondence. In the presence of a constant external axial gauge field in a spatial direction, we find the defining characteristic of a Weyl semi-metal: a quantum phase transition from a topological state with non-zero anomalous Hall conductivity to a trivial insulator. The transition is first order. We also compute entropy, heat capacity, and speed of sound, and find a peak. Our model allows for calculation of the DC conductivity in a constant electric field, with interesting results. Based on arXiv: 2012.11434. |