Many-body quantum interference route to the two-channel Kondo effect: Inverse design for molecular junctions and quantum dot devices
Fuente:
arXiv
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| Autores principales: | , |
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| Formato: | Preprint |
| Publicado: |
2023
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| _version_ | 1866914912537673728 |
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| author | Sen, Sudeshna Mitchell, Andrew K. |
| author_facet | Sen, Sudeshna Mitchell, Andrew K. |
| contents | 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. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2310_14775 |
| institution | arXiv |
| publishDate | 2023 |
| record_format | arxiv |
| spellingShingle | Many-body quantum interference route to the two-channel Kondo effect: Inverse design for molecular junctions and quantum dot devices Sen, Sudeshna Mitchell, Andrew K. Mesoscale and Nanoscale Physics Strongly Correlated Electrons Quantum Physics 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. |
| title | Many-body quantum interference route to the two-channel Kondo effect: Inverse design for molecular junctions and quantum dot devices |
| topic | Mesoscale and Nanoscale Physics Strongly Correlated Electrons Quantum Physics |
| url | https://arxiv.org/abs/2310.14775 |