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Halide perovskite artificial solids as a new platform to simulate collective phenomena in doped Mott insulators

Milloch, Alessandra ; Filippi, Umberto ; Capone, Massimo ; Baranov, Dmitry LU orcid ; Manna, Liberato and Giannetti, Claudio (2023) CMD30 FisMat 2023
Abstract
The development of Quantum Simulators, artificial platforms where the predictions of many-body theories of correlated quantum materials can be tested in a controllable and tunable way, is one of the main challenges of condensed matter physics. We introduce artificial lattices made of lead halide perovskite nanocubes as a new platform to simulate and investigate the physics of correlated quantum materials. The ultrafast optical injection of quantum-confined excitons plays a similar role to doping in real materials. We show that, at large photo-doping, the exciton gas undergoes an excitonic Mott transition, which can be mapped on the insulator-to-metal transition of the Hubbard model in a magnetic field. At lower photo-doping, the long-range... (More)
The development of Quantum Simulators, artificial platforms where the predictions of many-body theories of correlated quantum materials can be tested in a controllable and tunable way, is one of the main challenges of condensed matter physics. We introduce artificial lattices made of lead halide perovskite nanocubes as a new platform to simulate and investigate the physics of correlated quantum materials. The ultrafast optical injection of quantum-confined excitons plays a similar role to doping in real materials. We show that, at large photo-doping, the exciton gas undergoes an excitonic Mott transition, which can be mapped on the insulator-to-metal transition of the Hubbard model in a magnetic field. At lower photo-doping, the long-range interactions drive the formation of a collective superradiant state, in which the phases of the excitons generated in each single perovskite nanocube are coherently locked. Our results demonstrate that time-resolved experiments span a parameter region of the Hubbard model in which long-range and phase-coherent orders emerge out of a doped Mott insulating phase. This physics is relevant for a broad class of phenomena, such as superconductivity and charge-density waves in correlated materials whose properties are captured by doped Hubbard models. (Less)
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organization
publishing date
type
Contribution to conference
publication status
published
subject
conference name
CMD30 FisMat 2023
conference location
Milan, Italy
conference dates
2023-09-04 - 2023-09-08
language
English
LU publication?
yes
id
0ec8c442-3af3-45ee-8f59-8299919cbaf9
alternative location
https://eventi.cnism.it/cmd30-fismat/submission/view/136444933558049692
date added to LUP
2024-03-18 09:56:56
date last changed
2024-03-22 13:45:50
@misc{0ec8c442-3af3-45ee-8f59-8299919cbaf9,
  abstract     = {{The development of Quantum Simulators, artificial platforms where the predictions of many-body theories of correlated quantum materials can be tested in a controllable and tunable way, is one of the main challenges of condensed matter physics. We introduce artificial lattices made of lead halide perovskite nanocubes as a new platform to simulate and investigate the physics of correlated quantum materials. The ultrafast optical injection of quantum-confined excitons plays a similar role to doping in real materials. We show that, at large photo-doping, the exciton gas undergoes an excitonic Mott transition, which can be mapped on the insulator-to-metal transition of the Hubbard model in a magnetic field. At lower photo-doping, the long-range interactions drive the formation of a collective superradiant state, in which the phases of the excitons generated in each single perovskite nanocube are coherently locked. Our results demonstrate that time-resolved experiments span a parameter region of the Hubbard model in which long-range and phase-coherent orders emerge out of a doped Mott insulating phase. This physics is relevant for a broad class of phenomena, such as superconductivity and charge-density waves in correlated materials whose properties are captured by doped Hubbard models.}},
  author       = {{Milloch, Alessandra and Filippi, Umberto and Capone, Massimo and Baranov, Dmitry and Manna, Liberato and Giannetti, Claudio}},
  language     = {{eng}},
  month        = {{09}},
  title        = {{Halide perovskite artificial solids as a new platform to simulate collective phenomena in doped Mott insulators}},
  url          = {{https://eventi.cnism.it/cmd30-fismat/submission/view/136444933558049692}},
  year         = {{2023}},
}