Pseudo-heterostructure and condensation of 1D moiré excitons in twisted phosphorene bilayers.
basic_science · Level V
Where this comes from
- Record sourced from PubMed, PMID 37478184.
- Also identified by DOI 10.1126/sciadv.adi5404 and PMC identifier 10361592.
- Licence recorded as CC BY-NC.
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Abstract
Heterostructures are not expected to form in a single homogeneous material. Here, we show that planar pseudo-heterostructures could emerge in a twisted bilayer of phosphorene (tbP), driving in-plane energy and charge transfer. The formation of moiré superlattices combined with electronic anisotropy in tbPs yields one-dimensional (1D) moiré excitons with long radiative and nonradiative lifetimes, large binding energies, and deep moiré potentials. Low-frequency moiré phonons and dynamic moiré potentials are revealed to be responsible for the in-plane energy/charge transfer and exciton dynamics. The 1D moiré excitons are predicted to exhibit Bose-Einstein condensation at high temperatures and may lead to exotic Tonks-Girardeau Bose gases.