Optical Conductivity as a Probe of the Interaction-Driven Metal in Rhombohedral Trilayer Graphene.

ABSTRACT: Study of the strongly correlated states in van der Waals heterostructures is one of the central topics in modern condensed matter physics. Among these, the rhombohedral trilayer graphene (RTG) occupies a prominent place since it hosts a variety of interaction-driven phases, with the metallic ones yielding exotic superconducting orders upon doping. Motivated by these experimental findings, we show within the framework of the low-energy Dirac theory that the optical conductivity can distinguish different candidates for a paramagnetic metallic ground state in this system. In particular, this observable shows a single peak in the fully gapped valence-bond state. On the other hand, the bond-current state features two pronounced peaks in the optical conductivity as the probing frequency increase

SUBMITTER: Juricic V 

PROVIDER: S-EPMC9657299 | biostudies-literature | 2022 Oct

REPOSITORIES: biostudies-literature