Unmesh Ghorai

Jul 12, 2023 | link.aps.org | Homi Bhabha Road |Ayan Ghosh |Souvik Chakraborty |Unmesh Ghorai

Abstract Twisted double bilayer graphene is a compensated semimetal near the charge neutrality point with the presence of small electron and hole pockets in its band structure. We show that strong Coulomb attraction between the electrons and holes can lead to the formation of indirect excitons. Condensation of these excitons at low temperature creates an excitonic metal with charge density wave order for an appropriate range of interaction strength.