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Updated: Nov 16, 2025

Excitonic Hamiltonians for Calculating Optical Absorption Spectra and Optoelectronic Properties of Molecular Aggregates and Solids
Published on: May 27, 2020
Quasicondensation of Bilayer Excitons in a Periodic Potential
Camille Lagoin1, Stephan Suffit2, Kenneth West3
1Institut des Nanosciences de Paris, CNRS and Sorbonne Université, 4 pl. Jussieu, 75005 Paris, France.
Abstract:
We study two-dimensional excitons confined in a lattice potential, for high fillings of the lattice sites. We show that a quasicondensate is possibly formed for small values of the lattice depth, but for larger ones the critical phase-space density for quasicondensation rapidly exceeds our experimental reach, due to an increase of the exciton effective mass. On the other hand, in the regime of a deep lattice potential where excitons are strongly localized at the lattice sites, we show that an array of phase-independent quasicondensates, different from a Mott insulator, is realized.
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