Directly imaging spin polarons in a kinetically frustrated Hubbard system

ML Prichard, BM Spar, I Morera, E Demler, ZZ Yan… - Nature, 2024 - nature.com
The emergence of quasiparticles in quantum many-body systems underlies the rich
phenomenology in many strongly interacting materials. In the context of doped Mott …

Observation of Nagaoka polarons in a Fermi–Hubbard quantum simulator

M Lebrat, M Xu, LH Kendrick, A Kale, Y Gang… - Nature, 2024 - nature.com
Quantum interference can deeply alter the nature of many-body phases of matter. In the
case of the Hubbard model, Nagaoka proved that introducing a single itinerant charge can …

Observation of spin polarons in a frustrated moiré Hubbard system

Z Tao, W Zhao, B Shen, T Li, P Knüppel, K Watanabe… - Nature Physics, 2024 - nature.com
The electron's kinetic energy plays a pivotal role in magnetism. While virtual electron
hopping promotes antiferromagnetism in an insulator, real hopping processes usually favour …

High-temperature kinetic magnetism in triangular lattices

I Morera, M Kanász-Nagy, T Smolenski, L Ciorciaro… - Physical Review …, 2023 - APS
We study kinetic magnetism for the Fermi-Hubbard model in triangular lattices. We focus on
the regime of strong interactions, U≫ t, and filling factors around one electron per site. For …

Strong-coupling phases of trions and excitons in electron-hole bilayers at commensurate densities

DD Dai, L Fu - Physical Review Letters, 2024 - APS
We introduce density imbalanced electron-hole bilayers at a commensurate 2: 1 density
ratio as a platform for realizing novel phases of electrons, excitons, and trions. Through the …

Probing magnetism in moiré heterostructures with quantum twisting microscopes

F Pichler, W Kadow, C Kuhlenkamp, M Knap - Physical Review B, 2024 - APS
Spin-ordered states close to metal-insulator transitions are poorly understood theoretically
and challenging to probe in experiments. Here, we propose that the quantum twisting …

Polaron formation in insulators and the key role of hole scattering processes in band insulators, charge density waves, and Mott transitions

I Amelio, G Mazza, N Goldman - Physical Review B, 2024 - APS
A mobile impurity immersed in a noninteracting Fermi sea is dressed by the gapless particle-
hole excitations of the fermionic medium. This conventional Fermi-polaron setting is well …

Chiral Pseudospin Liquids in Moiré Heterostructures

C Kuhlenkamp, W Kadow, A Imamoğlu, M Knap - Physical Review X, 2024 - APS
We propose multilayer moiré structures in strong external magnetic fields as a novel platform
for realizing highly tunable, frustrated Hubbard physics with topological order. Identifying the …

Modulation of Kondo Behavior in a Two-Dimensional Epitaxial Bilayer Bi(111)/Fe3GeTe2 Moiré Heterostructure

Y Xi, Z Shi, M Zhao, N Cheng, K Du, K Li, H Xu, S Xu… - ACS …, 2024 - ACS Publications
Artificial two-dimensional (2D) moiré superlattices provide a platform for generating exotic
quantum matter or phenomena. Here, an epitaxial heterostructure composed of bilayer Bi …

Chiral polaron formation on the edge of topological quantum matter

A Vashisht, I Amelio, L Vanderstraeten… - arXiv preprint arXiv …, 2024 - arxiv.org
Immersing a mobile impurity in a quantum many-body environment can reveal fundamental
properties of the background medium, hence providing a powerful probe of quantum matter …