Date : February 21, 2023, 16:00 CET
Ronnie Rodgers (Nordita)
Link: https://zoom.us/j/98260147834?pwd=VW5BQStqUGUrUFFzWG1jL2tuWXJoZz09
Holographic nodal-antinodal dichotomy from infrared scaling
Abstract: Angle-resolved photoemission spectroscopy (ARPES) measurements in the pseudogap phase of cuprates reveal a Fermi surface seemingly made up of disconnected arcs: the electron spectral function exhibits sharp peaks in certain directions in momentum space, which appear to blur into a continuum in other directions. This phenomenon is known as nodal-antinodal dichotomy. I will discuss how this dichotomy can be realised in holography through an anisotropic infrared scaling symmetry. I will begin with a general analysis of the low-frequency behaviour of fermion spectral functions in holographic systems with such scaling. I will then show our calculations of the spectral function in an example model, providing a clear demonstration of the scaling-based mechanism for realising the dichotomy.
