Molecular junctions -- whether actual single molecules in nanowire break junctions or artificial molecules realized in coupled quantum dot devices -- offer unique functionality due to their orbital complexity, strong electron interactions, gate control, and many-body effects from hybridization with the external electronic circuit. Inverse design involves finding candidate structures that perform a desired function optimally. Here we develop an inverse design strategy for generalized quantum impurity models describing molecular junctions, and as an example, use it to demonstrate that many-body quantum interference can be leveraged to realize the two-channel Kondo critical point in simple 4- or 5-site molecular moieties. We show that remarkably high Kondo temperatures can be achieved, meaning that entropy and transport signatures should be experimentally accessible.
@article{arxiv.2310.14775,
title = {Many-body quantum interference route to the two-channel Kondo effect: Inverse design for molecular junctions and quantum dot devices},
author = {Sudeshna Sen and Andrew K. Mitchell},
journal= {arXiv preprint arXiv:2310.14775},
year = {2024}
}