Collective quantum state at the atomic limit
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arXiv
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| Autores principales: | , , , , , , , , , , |
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| Formato: | Preprint |
| Publicado: |
2026
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| Materias: | |
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| _version_ | 1866913097327837184 |
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| author | Zhang, Fan Li, Yanxing Dong, Chengye Dongre, Ninad Kailas Ha, Viet-Anh Lin, Yu-Chuan Luo, Yiyuan Kim, Hyunsue Robinson, Joshua A. Giustino, Feliciano Zhang, Fan Shih, Chih-Kang |
| author_facet | Zhang, Fan Li, Yanxing Dong, Chengye Dongre, Ninad Kailas Ha, Viet-Anh Lin, Yu-Chuan Luo, Yiyuan Kim, Hyunsue Robinson, Joshua A. Giustino, Feliciano Zhang, Fan Shih, Chih-Kang |
| contents | Collective quantum states are often associated with extended systems, where spatially extensive degrees of freedom enable emergent many-body behavior; whether such strongly correlated states survive at atomic dimensions remains a fundamental question. Tomonaga-Luttinger liquids provide a paradigmatic example of one-dimensional collective quantum matter characterized by spin-charge separation. Using low-temperature scanning tunneling microscopy and spectroscopy, we directly visualize quantized collective modes in atomically confined mirror twin boundary segments of monolayer WSe2. Distinct standing-wave branches associated with fractionalized spin and charge excitations persist in segments as short as one nanometer, establishing the atomic-scale confinement limit of Luttinger-liquid behavior. These ultrashort segments form a new class of many-body quantum dots whose discrete spectra arise from confined collective bosonic modes rather than single-particle electron states. When assembled into ordered chains, inter-dot coupling reshapes electron-like fundamental states while collective spin/charge excitations remain largely intact, revealing distinct coupling responses of emergent many-body modes. Our results demonstrate that collective quantum matter can persist and exhibit fundamentally distinct coupling behavior at atomic length scales, establishing a novel platform for engineering strongly correlated quantum phases from atomically confined building blocks. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2605_05587 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | Collective quantum state at the atomic limit Zhang, Fan Li, Yanxing Dong, Chengye Dongre, Ninad Kailas Ha, Viet-Anh Lin, Yu-Chuan Luo, Yiyuan Kim, Hyunsue Robinson, Joshua A. Giustino, Feliciano Zhang, Fan Shih, Chih-Kang Mesoscale and Nanoscale Physics Materials Science Strongly Correlated Electrons Collective quantum states are often associated with extended systems, where spatially extensive degrees of freedom enable emergent many-body behavior; whether such strongly correlated states survive at atomic dimensions remains a fundamental question. Tomonaga-Luttinger liquids provide a paradigmatic example of one-dimensional collective quantum matter characterized by spin-charge separation. Using low-temperature scanning tunneling microscopy and spectroscopy, we directly visualize quantized collective modes in atomically confined mirror twin boundary segments of monolayer WSe2. Distinct standing-wave branches associated with fractionalized spin and charge excitations persist in segments as short as one nanometer, establishing the atomic-scale confinement limit of Luttinger-liquid behavior. These ultrashort segments form a new class of many-body quantum dots whose discrete spectra arise from confined collective bosonic modes rather than single-particle electron states. When assembled into ordered chains, inter-dot coupling reshapes electron-like fundamental states while collective spin/charge excitations remain largely intact, revealing distinct coupling responses of emergent many-body modes. Our results demonstrate that collective quantum matter can persist and exhibit fundamentally distinct coupling behavior at atomic length scales, establishing a novel platform for engineering strongly correlated quantum phases from atomically confined building blocks. |
| title | Collective quantum state at the atomic limit |
| topic | Mesoscale and Nanoscale Physics Materials Science Strongly Correlated Electrons |
| url | https://arxiv.org/abs/2605.05587 |