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- Permanent member: François Dubin
- Researcher Emeritus: Monique Combescot
Composite bosons model systems like excitons in semiconductor heterostructures are also investigated. After the demonstration of Bose-Einstein condensation with indirect excitons in our group, the different quantum phases of collective states in two dimensions are explored through the Berezinskii-Kosterlitz-Thouless transition. These experiments are closely related to theoretical developments using a new many-body formalism for composite bosons and its Shiva diagrammatic representation. This formalism can be extended to different fields and a natural application is to cold quantum gazes in which the particles’ composite nature has been neglected till now.
Publications
- C Lagoin, S Suffit, K West, K Baldwin, L Pfeiffer, M Holzmann, F Dubin. Quasicondensation of Bilayer Excitons in a Periodic Potential. Physical Review Letters 126 (6), 067404, (2021)
- C Lagoin, F Dubin. Key role of the moiré potential for the quasicondensation of interlayer excitons in van der Waals heterostructures. Physical Review B 103 (4), L041406 (2021) https://journals.aps.org/prb/abstract/10.1103/PhysRevB.103.L041406
- C Lagoin, S Suffit, M Bernard, M Vabre, K West, K Baldwin, L Pfeiffer. Microscopic lattice for two-dimensional dipolar excitons. Physical Review B 102 (24), 245428, (2020)
- Suzanne Dang, Marta Zamorano, Stephan Suffit, Kenneth West, Kirk Baldwin, et al.. Observation of algebraic time order for two-dimensional dipolar excitons. Physical Review Research, American Physical Society, 2020, 2 (3), ⟨10.1103/PhysRevResearch.2.032013⟩. ⟨hal-03015496⟩
- Suzanne Dang, Romain Anankine, Carmen Gomez, Aristide Lemaître, Markus Holzmann, et al.. Defect Proliferation at the Quasicondensate Crossover of Two-Dimensional Dipolar Excitons Trapped in Coupled GaAs Quantum Wells. Physical Review Letters, American Physical Society, 2019, 122 (11), ⟨10.1103/PhysRevLett.122.117402⟩. ⟨hal-02325689⟩
- Romain Anankine, Suzanne Dang, Mussie Beian, Edmond Cambril, Carmen Gomez Carbonell, et al.. Temporal coherence of spatially indirect excitons across Bose–Einstein condensation: the role of free carriers. New Journal of Physics, Institute of Physics: Open Access Journals, 2018, 20 (7), pp.073049. ⟨10.1088/1367-2630/aad30a⟩. ⟨hal-03015127⟩
