Two-dimensional terahertz spectroscopy in complex matter systems

Abstract

Two-dimensional terahertz spectroscopy (2DTS), a terahertz analogue of nuclear magnetic resonance, stands as a novel technique poised to address numerous open questions in complex condensed matter systems. The conventional theoretical framework, widely used for interpreting multidimensional spectra of discrete quantum-level systems, falls short in capturing the continua of collective excitations in strongly correlated materials, and thus a ground-up reformulation is required. In this talk, we provide a pedagogical introduction to the technique emphasizing its unique capabilities for interrogating the properties of these systems. We will focus on how to disentangle disorder from intrinsic broadening, coupling between modes and interaction between excitations among others.

References

• arxiv.org/abs/2401.05503
• arxiv.org/abs/2308.14849