2021/11/24 by Chao Xu, Michael Fogler, M. M. Fogler · 2 citations
Chemistry · Physics and Astronomy · #Atomic physics #Biexciton #Bilayer #Chemistry #Condensed matter physics #Dipole #Electron #Excited state #Exciton #Ground state #Physics #Physics of Superconductivity and Magnetism #Polaron #Quantum and electron transport phenomena #Quantum mechanics #Strong Light-Matter Interactions #cond-mat.mes-hall
paper · pdf · doi:10.1103/physrevb.104.195430
published in Physical review. B./Physical review. B 104(19) (American Physical Society)
openalex publication_date 2021/11/24 · arxiv created 2022/03/09 · arxiv updated 2022/03/10 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
Interlayer excitons are bound states of electrons and holes confined in separate two-dimensional layers. Due to their repulsive dipolar interaction, interlayer excitons can form a correlated liquid. If another electron-hole bilayer is present, excitons from different bilayers can exhibit mutual attraction. We study such a quadrilayer system by a hypernetted chain formalism. We compute ground state energies, pair correlation functions, and collective mode velocities as functions of the exciton densities. We estimate the critical density for the transition to a paired biexciton phase. For a strongly unbalanced (unequal density) system, the excitons in the more dilute bilayer behave as polarons. We compute energies and effective masses of such exciton-polarons.