Strain-induced superfluid transition for atoms on graphene
Abstract
Bosonic atoms deposited on atomically thin substrates represent a playground for exotic quantum many-body physics due to the highly-tunable, atomic-scale nature of the interaction potentials. The ability to engineer strong interparticle interactions can lead to the emergence of complex collective atomic states of matter, not possible in the context of dilute atomic gases confined in optical lattices. While it is known that the first layer of adsorbed helium on graphene is permanently locked into a solid phase, we show by a combination of quantum Monte Carlo and mean-field techniques, that simple isotropic graphene lattice expansion effectively unlocks a large variety of two-dimensional ordered commensurate, incommensurate, cluster atomic solid, and superfluid states for adsorbed atoms. It is especially significant that an atomically thin superfluid phase of matter emerges under experimentally feasible strain values, with potentially supersolid phases in close proximity on the phase diagram.
Cite
@article{arxiv.2211.07672,
title = {Strain-induced superfluid transition for atoms on graphene},
author = {Sang Wook Kim and Mohamed Elsayed and Nathan S. Nichols and Taras Lakoba and Juan Vanegas and Carlos Wexler and Valeri N. Kotov and Adrian Del Maestro},
journal= {arXiv preprint arXiv:2211.07672},
year = {2024}
}
Comments
Main text: 12 pages and 5 figures. Supplementary Information: 3 pages and 3 figures. For associated data and code repository see: https://github.com/DelMaestroGroup/papers-code-Superfluid4HeStrainGraphene