Electronic quantum materials simulated with artificial model lattices

SE Freeney, MR Slot, TS Gardenier, I Swart… - ACS Nanoscience …, 2022 - ACS Publications
The band structure and electronic properties of a material are defined by the sort of
elements, the atomic registry in the crystal, the dimensions, the presence of spin–orbit …

Observation and spectroscopy of a two-electron Wigner molecule in an ultraclean carbon nanotube

S Pecker, F Kuemmeth, A Secchi, M Rontani… - Nature Physics, 2013 - nature.com
Two electrons on a string form a simple model system where Coulomb interactions are
expected to play an interesting role. In the presence of strong interactions, these electrons …

Coherent control and spectroscopy of a semiconductor quantum dot Wigner molecule

J Corrigan, JP Dodson, HE Ercan, JC Abadillo-Uriel… - Physical Review Letters, 2021 - APS
Semiconductor quantum dots containing more than one electron have found wide
application in qubits, where they enable readout and enhance polarizability. However …

Strong electron-electron interactions in Si/SiGe quantum dots

HE Ercan, SN Coppersmith, M Friesen - Physical Review B, 2021 - APS
Interactions between electrons can strongly affect the shape and functionality of
multielectron quantum dots. The resulting charge distributions can be localized, as in the …

Observation of a biexciton wigner molecule by fractional optical aharonov-bohm oscillations in a single quantum ring

HD Kim, R Okuyama, K Kyhm, M Eto, RA Taylor… - Nano …, 2016 - ACS Publications
The Aharonov-Bohm effect in ring structures in the presence of electronic correlation and
disorder is an open issue. We report novel oscillations of a strongly correlated exciton pair …

Two-body Wigner molecularization in asymmetric quantum dot spin qubits

JC Abadillo-Uriel, B Martinez, M Filippone, YM Niquet - Physical Review B, 2021 - APS
Coulomb interactions strongly influence the spectrum and the wave functions of a few
electrons or holes confined in a quantum dot. In particular, when the confinement potential is …

Control of Wigner localization and electron cavity effects in near-field emission spectra of In (Ga) P/GaInP quantum-dot structures

AM Mintairov, J Kapaldo, JL Merz, S Rouvimov… - Physical Review B, 2018 - APS
Structural and emission properties of few-electron In (Ga) P/GaInP quantum dots (QDs)
representing natural Wigner molecules (WM) and whispering gallery mode (WGM) electron …

Pairing of a few Fermi atoms in one dimension

P D'Amico, M Rontani - Physical Review A, 2015 - APS
We study a few Fermi atoms interacting through attractive contact forces in a one-
dimensional trap by means of numerical exact diagonalization. From the combined analysis …

Wigner molecules in carbon-nanotube quantum dots

A Secchi, M Rontani - Physical Review B—Condensed Matter and Materials …, 2010 - APS
We demonstrate that electrons in quantum dots defined by electrostatic gates in
semiconductor nanotubes freeze orderly in space realizing a “Wigner molecule.” Our exact …

Fermionic versus bosonic behavior of confined Wigner molecules

E Cuestas, PA Bouvrie, AP Majtey - Physical Review A, 2020 - APS
We assess whether a confined Wigner molecule constituted by 2 N fermions behaves as N
bosons or 2 N fermions. Following the work by Law [Phys. Rev. A 71, 034306 (2005) …