Halide perovskites enable polaritonic XY spin Hamiltonian at room temperature

Authors

• Renjie Tao, University of California, Berkeley
• Kai Peng, University of Nebraska-LincolnFollow
• Louis Haeberlé, École Polytechnique de Montréal
• Quanwei Li, University of California, Berkeley
• Dafei Jin, Argonne National LaboratoryFollow
• Graham R. Fleming, University of California, BerkeleyFollow
• Stéphane Kéna-Cohen, École Polytechnique de MontréalFollow
• Xiang Zhang, University of California, BerkeleyFollow
• Wei Bao, University of Nebraska-LincolnFollow

Document Type

Article

Date of this Version

6-9-2022

Citation

Published in Nature Materials 2022

doi:10.1038/s41563-022-01276-4

Comments

Copyright © 2022 by the authors, under exclusive license to Springer Nature Limited. Used by permission.

Abstract

Exciton polaritons, the part-light and part-matter quasiparticles in semiconductor optical cavities, are promising for exploring Bose–Einstein condensation, non-equilibrium many-body physics and analogue simulation at elevated temperatures. However, a room-temperature polaritonic platform on par with the GaAs quantum wells grown by molecular beam epitaxy at low temperatures remains elusive. The operation of such a platform calls for long-lifetime, strongly interacting excitons in a stringent material system with large yet nanoscale-thin geometry and homogeneous properties. Here, we address this challenge by adopting a method based on the solution synthesis of excitonic halide perovskites grown under nanoconfinement. Such nanoconfinement growth facilitates the synthesis of smooth and homogeneous single-crystalline large crystals enabling the demonstration of XY Hamiltonian lattices with sizes up to 10 × 10. With this demonstration, we further establish perovskites as a promising platform for room temperature polaritonic physics and pave the way for the realization of robust mode-disorder-free polaritonic devices at room temperature.