Electrically controlled interlayer trion fluid in electron-hole bilayers

doi:10.1126/science.adn4584

Electrically controlled interlayer trion fluid in electron-hole bilayers

2025-10-16

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DOI：10.1126/science.adn4584

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Semiconductors can host multiparticle electron-hole states, which are usually short-lived due to electron-hole recombination. A promising system for studying their equilibrium properties are double layers of transition metal dichalcogenides, in which the carrier density in each layer can be independently controlled. Qi et al. and Nguyen et al. engineered an equilibrium quantum liquid of trions consisting of, for example, two holes and an electron in Coulomb-coupled molybdenum and tungsten diselenide (MoSe2/WSe2) double layers (see the Perspective by Ouyang and Shi). To achieve this, the researchers tuned the ratio of electron density in the MoSe2 layer to the hole density in the WSe2 layer and used transport, capacitance, and optical measurements to probe the system. —Jelena Stajic

Electrically controlled interlayer trion fluid in electron-hole bilayers

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