The Interaction in the Macroscopically Ordered Exciton State
Sen Yang, A.V. Mintsev, A.T. Hammack, L.V. Butov, A.C. Gossard
TL;DR
This paper investigates the interactions within the macroscopically ordered exciton state (MOES), revealing that it is characterized by repulsive interactions, with experimental evidence showing energy variations correlated with intensity along the ring.
Contribution
The study provides experimental evidence that the MOES is driven by repulsive interactions, clarifying the nature of interactions in this macroscopic exciton order.
Findings
Energy varies with intensity along the ring
Largest energy in brightest regions
MOES characterized by repulsive interactions
Abstract
The macroscopically ordered exciton state (MOES) - a periodic array of beads with spatial order on a macroscopic length - appears in the external exciton rings at low temperatures below a few Kelvin. Here, we report on the experimental study of the interaction in the MOES. The exciton PL energy varies in concert with the intensity along the circumference of the ring, with the largest energy found in the brightest regions. This shows that the MOES is characterized by the repulsive interaction and is not driven by the attractive interaction.
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