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Bound trions in two-dimensional monolayers: A review

Year: 2026

Type: article

Abstract: Trions Coulomb-bound three-particle excitations composed of two like-charge carriers and one oppositely charged carrier are central quasiparticles in two-dimensional semiconductors. Reduced dielectric screening and quantum confinement strongly enhance their binding energies, making them robust and experimentally accessible. This review surveys theoretical and experimental advances in trion physics, emphasizing rigorous few-body approaches and the role of dielectric environment, anisotropy and external electric and magnetic fields. We analyze computational methods for describing trions in two-dimensional configuration spaces and discuss how reduced dimensionality modifies their structure and stability. Connections to many-body phenomena, including screening, Landau-level mixing and exciton–polaron crossover, are also highlighted.

Source: International Journal of Modern Physics B

DOI: 10.1142/s0217979226300069

Author: Roman Ya. Kezerashvili

Institutions: The Graduate Center, CUNY, Long Island University, City University of New York, New York City College of Technology

Language: English

Topic: Semiconductor Quantum Structures and Devices

Subfield: Atomic and Molecular Physics, and Optics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: green

OpenAlex ID: W7166341957

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Cites: 253

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