Emerging exciton physics in transition metal dichalcogenide heterobilayers

EC Regan, D Wang, EY Paik, Y Zeng, L Zhang… - Nature Reviews …, 2022 - nature.com
Atomically thin transition metal dichalcogenides (TMDs) are 2D semiconductors with tightly
bound excitons and correspondingly strong light–matter interactions. Owing to the weak van …

Excitonic devices with van der Waals heterostructures: valleytronics meets twistronics

A Ciarrocchi, F Tagarelli, A Avsar, A Kis - Nature Reviews Materials, 2022 - nature.com
Abstract 2D semiconducting transition metal dichalcogenides comprise an emerging class of
materials with distinct properties, including large exciton binding energies that reach …

Strongly correlated excitonic insulator in atomic double layers

L Ma, PX Nguyen, Z Wang, Y Zeng, K Watanabe… - Nature, 2021 - nature.com
Excitonic insulators (EIs) arise from the formation of bound electron–hole pairs (excitons), in
semiconductors and provide a solid-state platform for quantum many-boson physics …

Evidence of high-temperature exciton condensation in two-dimensional atomic double layers

Z Wang, DA Rhodes, K Watanabe, T Taniguchi… - Nature, 2019 - nature.com
A Bose–Einstein condensate is the ground state of a dilute gas of bosons, such as atoms
cooled to temperatures close to absolute zero. With much smaller mass, excitons (bound …

[HTML][HTML] Production and processing of graphene and related materials

C Backes, AM Abdelkader, C Alonso… - 2D …, 2020 - iopscience.iop.org
We present an overview of the main techniques for production and processing of graphene
and related materials (GRMs), as well as the key characterization procedures. We adopt …

Dipolar excitonic insulator in a moiré lattice

J Gu, L Ma, S Liu, K Watanabe, T Taniguchi, JC Hone… - Nature physics, 2022 - nature.com
Two-dimensional moiré materials provide a highly controllable solid-state platform for
studies of quantum phenomena,–. To date, experimental studies have focused on correlated …

Variational and diffusion quantum Monte Carlo calculations with the CASINO code

RJ Needs, MD Towler, ND Drummond… - The Journal of …, 2020 - pubs.aip.org
We present an overview of the variational and diffusion quantum Monte Carlo methods as
implemented in the casino program. We particularly focus on developments made in the last …

Chiral excitonic order from twofold van Hove singularities in kagome metals

HD Scammell, J Ingham, T Li, OP Sushkov - Nature Communications, 2023 - nature.com
Recent experiments on kagome metals AV3Sb5 (A= K, Rb, Cs) identify twofold van Hove
singularities (TvHS) with opposite concavity near the Fermi energy, generating two …

Exciton density waves in Coulomb-coupled dual moiré lattices

Y Zeng, Z **a, R Dery, K Watanabe, T Taniguchi… - Nature Materials, 2023 - nature.com
Strongly correlated bosons in a lattice are a platform that can realize rich bosonic states of
matter and quantum phase transitions. While strongly correlated bosons in a lattice have …

Perfect Coulomb drag in a dipolar excitonic insulator

PX Nguyen, L Ma, R Chaturvedi, K Watanabe… - arxiv preprint arxiv …, 2023 - arxiv.org
Excitonic insulators (EIs), arising in semiconductors when the electron-hole binding energy
exceeds the band gap, are a solid-state prototype for bosonic phases of matter. Unlike the …