Partial condensation of mobile excitons in graphene multilayers

• DOI: 10.48550/arxiv.2303.17350
• Publication Date: 2023-01-01
• Authors: Igor V. Blinov; Chunli Huang; Nemin Wei; Qin Wei; Tobias Wolf; A. H. MacDonald
• Keywords: Biexciton; Oscillation (cell signaling)

At a large displacement field, in rhomboedral and Bernal-stacked graphene normal paramagnetic state transitions to correlated state. Recent experiments showed that such systems have several phase as function of the carrier density. The adjacent has anomalously high resistance reduced degeneracy Fermi sea. We show both phenomena can be explained through concept partial intervalley exciton condensation: fraction particles condenses into excitons, another forms an coherent liquid. part system do not contribute electrical current thus increasing resistance. Within this paradigm, increase entirely geometrical origin. check validity phenomenological theory numerical calculations. also quantum oscillation data should very different between excitonic states suggested by other authors. Further, we suggest STM/AFM or Raman spectroscopy conclusive evidence for occurrence condensation paper.