Functional nanoporous graphene superlattice

Nature Communications, Journal Year: 2024, Volume and Issue: 15(1)

Published: Feb. 12, 2024

Abstract Two-dimensional (2D) superlattices, formed by stacking sublattices of 2D materials, have emerged as a powerful platform for tailoring and enhancing material properties beyond their intrinsic characteristics. However, conventional synthesis methods are limited to pristine sublattices, posing significant practical challenge when it comes chemically modified sublattices. Here we report chemical method that overcomes this creating unique graphene superlattice, with monodisperse, nanometer-sized, square-shaped pores strategically doped elements at the pore edges. The resulting superlattice exhibits remarkable correlations between quantum phases both electron phonon levels, leading diverse functionalities, such electromagnetic shielding, energy harvesting, optoelectronics, thermoelectrics. Overall, our findings not only provide design principles synthesizing understanding functional superlattices but also expand enhanced functionality extensive application potential compared counterparts.

Language: Английский

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Moiré synaptic transistor with room-temperature neuromorphic functionality

Nature, Journal Year: 2023, Volume and Issue: 624(7992), P. 551 - 556

Published: Dec. 20, 2023

Language: Английский

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Ultrasensitive photoelectric detection with room temperature extremum

Light Science & Applications, Journal Year: 2025, Volume and Issue: 14(1)

Published: Feb. 26, 2025

Abstract Room-temperature photodetection holds pivotal significance in diverse applications such as sensing, imaging, telecommunications, and environmental remote sensing due to its simplicity, versatility, indispensability. Although different kinds of photon thermal detectors have been realized, high sensitivity with room temperature extremum is not reported until now. Herein, we find evident peaks the photoelectric response originated from anomalous excitonic insulator phase transition tantalum nickel selenide (Ta 2 NiSe 5 ) for room-temperature optimized visible light terahertz ranges. Extreme photoconductive detector specific detectivity (D*) 5.3 × 10 11 cm·Hz 1/2 ·W − 1 electrical bandwidth 360 kHz reached range, which one two orders magnitude improvement compared that state-of-the-art detectors. The van der Waals heterostructure Ta /WS further constructed suppress dark current at much improved ambient D* 4.1 12 −1 wavelength, rivaling typical photodetectors, superior performance range photoconductor device. Our results open a new avenue optoelectronics via broad wavelength bands pave way sensitive temperature.

Language: Английский

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Frozen non-equilibrium dynamics of exciton Mott insulators in moiré superlattices

Nature Materials, Journal Year: 2025, Volume and Issue: unknown

Published: March 3, 2025

Language: Английский

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Quadrupolar excitons and hybridized interlayer Mott insulator in a trilayer moiré superlattice

Nature Communications, Journal Year: 2023, Volume and Issue: 14(1)

Published: Aug. 1, 2023

Transition metal dichalcogenide (TMDC) moiré superlattices, owing to the flatbands and strong correlation, can host periodic electron crystals fascinating correlated physics. The TMDC heterojunctions in type-II alignment also enable long-lived interlayer excitons that are promising for bosonic states, while interaction is dictated by asymmetry of heterojunction. Here we demonstrate a new excitonic state, quadrupolar exciton, symmetric WSe

Language: Английский

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Valley-polarized excitonic Mott insulator in WS2/WSe2 moiré superlattice

Nature Physics, Journal Year: 2023, Volume and Issue: 20(1), P. 34 - 39

Published: Nov. 6, 2023

Language: Английский

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Engineering correlated insulators in bilayer graphene with a remote Coulomb superlattice

Nature Materials, Journal Year: 2024, Volume and Issue: 23(2), P. 189 - 195

Published: Jan. 4, 2024

Language: Английский

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Dynamically tunable moiré exciton Rydberg states in a monolayer semiconductor on twisted bilayer graphene

Nature Materials, Journal Year: 2024, Volume and Issue: 23(2), P. 224 - 229

Published: Jan. 4, 2024

Language: Английский

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Remote imprinting of moiré lattices

Nature Materials, Journal Year: 2024, Volume and Issue: 23(2), P. 219 - 223

Published: Jan. 4, 2024

Language: Английский

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Mott-moiré excitons

Physical review. B./Physical review. B, Journal Year: 2023, Volume and Issue: 107(19)

Published: May 26, 2023

We develop a systematic theory for excitons subject to Fermi-Hubbard physics in moir\'e twisted transition metal dichalcogenides (TMDs). Specifically, we consider from two bands with Mott-insulating valence band sustaining ${120}^{\ensuremath{\circ}}$ spin order. These ``Mott-moir\'e excitons,'' which are achievable TMD heterobilayers, bound states of magnetic polaron the and free electron conduction band. find significantly narrower exciton bandwidths presence Hubbard physics, serving as potential experimental signature strong correlations. also demonstrate high tunability Mott-moir\'e through dependence their binding energies, diameters, on period. In addition, study between charges outside strongly correlated that these well exhibit signatures correlation. Our work provides guidelines future exploration triangular systems such heterobilayers.

Language: Английский

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