HET seminar: Ulf Gran

Speaker: Ulf Gran

Title: Holographic Plasmons


Plasmons are ubiquitous in all conducting matter. We show how to model plasmons holographically, relevant for systems without quasiparticles, e.g. the ‘strange metal’ phase of high temperature superconductors. By introducing holographic electromagnetism we derive a novel set of of boundary conditions which the plasmon modes, and in fact all collective modes, must satisfy. We present the results for both bulk and 2DEG plasmons, and preliminary results for interface plasmons, and highlight that holographic bulk plasmons exhibit an exotic dispersion in a part of the parameter space not accessible by conventional methods.