Observation of Algebraic Time Order for Two-Dimensional Dipolar Excitons
arXiv:2001.01309 · doi:10.1103/PhysRevResearch.2.032013
Abstract
Emergence of algebraic quasi-long-range order is a key feature of superfluid phase transitions at two dimensions. For this reduced dimensionality interactions prevent Bose-Einstein condensation with true long range order, at any finite temperature. Here, we report the occurence of algebraic order in a strongly interacting quantum liquid formed by dipolar excitons confined in a bilayer semiconductor heterostructure. We observe a transition from exponential to algebraic decay of the excitons temporal coherence, accompanied by a universal scaling behaviour of the equation of state. Our results provide strong evidence for a Berezinskii-Kosterlitz-Thouless (BKT) transition in a multi-component boson-like system governed by strong dipolar interactions.
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Cited by in corpus (6)
- Key role of the moire potential for the quasi-condensation of interlayer excitons in van der Waals heterostructures
- Quasi-condensation of bilayer excitons in a periodic potential
- Exploring the Berezinskii-Kosterlitz-Thouless Transition in a Two-dimensional Dipolar Bose Gas
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- Spin-orbit coupled depairing of a dipolar biexciton superfluid