Halide Perovskite Artificial Solids as a New Platform to Simulate Collective Phenomena in Doped Mott Insulators

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. Here we introduce artificial lattices made of lead halide perovskite nanocubes as a new platform to simulate and investigate the physics of correlated quantum materials. We demonstrate that optical injection of quantum confined excitons in this system realizes the two main features that ubiquitously pervade the phase diagram of many quantum materials: collective phenomena, in which long-range orders emerge from incoherent fluctuations, and the excitonic Mott transition, which has one-to-one correspondence with the insulator-to-metal transition described by the repulsive Hubbard model in a magnetic field. Our results demonstrate that time-resolved experiments provide a quantum simulator that is able to span a parameter range relevant for a broad class of phenomena, such as superconductivity and charge-density waves.

Dual-Ligand Red Perovskite Ink for Electrohydrodynamic Printing Color Conversion Arrays over 2540 dpi in Near-Eye Micro-LED Display

“…However, it is difficult to mechanically transfer red, green, and blue (RGB) three primary colored micro-LED chips on a same substrate at a sufficiently high yield for full-color display . The utilization of all-inorganic perovskite nanocrystals , (PeNCs) as color-conversion layers (CCLs) offers a promising technology for the design of full color micro-LED display because of those favorable intrinsic characters of PeNCs, , such as their high brightness, high photoluminescence quantum yield (PLQY), narrow peak line width, and easily tunable emission wavelength . The deposited red, green, and blue PeNCs can be effectively excited by the ultraviolet micro-LED chips and emit three primary colors and can act as the subpixels .…”