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arXiv · 2312.12571

A degenerate trion liquid in atomic double layers

Phuong X. Nguyen·Raghav Chaturvedi·Liguo Ma·Patrick Knuppel·Kenji Watanabe·Takashi Taniguchi·Kin Fai Mak·Jie Shan
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Abstract

Trions are a three-particle bound state of electrons and holes. Experimental realization of a trion liquid in the degenerate quantum limit would open a wide range of phenomena in quantum many-body physics. However, trions have been observed only as optically excited states in doped semiconductors to date. Here we report the emergence of a degenerate trion liquid in a Bose-Fermi mixture of holes and excitons in Coulomb-coupled MoSe2/WSe2 monolayers. By electrically tuning the hole density in WSe2 to be two times the electron density in MoSe2, we generate equilibrium interlayer trions with binding energy about 1 meV at temperatures two orders of magnitude below the Fermi temperature. We further demonstrate a density-tuned phase transition to an electron-hole plasma, spin-singlet correlations for the constituent holes and Zeeman-field-induced dissociation of trions. The results pave the way for exploration of the correlated phases of composite particles in solids.

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Phuong X. Nguyen, Raghav Chaturvedi, Liguo Ma, Patrick Knuppel, Kenji Watanabe, Takashi Taniguchi, Kin Fai Mak, Jie Shan. 2023-12-19. A degenerate trion liquid in atomic double layers. https://arxiv.org/abs/2312.12571

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