Broadband Microwave Spectroscopy for Two-Dimensional Material Systems

Abstract

In recent years, interesting materials have emerged which are only available as micron-scale flakes, and whose novel physics might be better understood through broadband microwave spectroscopy; examples include twisted bilayer graphene [1], 2D materials in which many-body phases are observed [2], and artificial lattices for analog quantum simulations [3]. Most previous techniques are unfortunately not sensitive for flakes below mm lateral sizes. We propose a simple technique which does not require sophisticated sample preparation nor Ohmic contact and show through theory and simulations that one will be able to qualitatively measure spectral features of interest, and quantitatively measure the frequency-dependent complex conductivity.

27 pages, 4 figures in the main text, 5 figures in the supplemental

References in corpus (6)

• Electrodynamics of Correlated Electron Materials
• Evidence for Two Different Solid Phases of Two Dimensional Electrons in High Magnetic Fields
• Quasi-Particle Dynamics in Superconducting Aluminum
• Broadband dielectric microwave microscopy on $\mu$m length scales
• Observation of pinning mode of stripe phases of 2D systems in high Landau levels
• Microwave directional dichroism resonant with spin excitations in the polar ferromagnet GaV${}_4$S${}_8$