Inducing a many-body topological state of matter through Coulomb-engineered local interactions
arXiv:2008.07990 · doi:10.1103/PhysRevResearch.3.013265
Abstract
The engineering of artificial systems hosting topological excitations is at the heart of current condensed matter research. Most of these efforts focus on single-particle properties neglecting possible engineering routes via the modifications of the fundamental many-body interactions. Interestingly, recent experimental breakthroughs have shown that Coulomb interactions can be efficiently controlled by substrate screening engineering. Inspired by this success } we propose a simple platform in which topologically non-trivial many-body excitations emerge solely from dielectrically-engineered Coulomb interactions in an otherwise topologically trivial single-particle band structure. Furthermore, by performing a realistic microscopic modeling of screening engineering, we demonstrate how our proposal can be realized in one-dimensional systems such as quantum-dot chains. Our results put forward Coulomb engineering as a powerful tool to create topological excitations, with potential applications in a variety of solid-state platforms.
arXiv comment9 pages, 6 figures
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