Suppression of shot noise at a Kondo destruction quantum critical point
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arXiv
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| Main Authors: | , , , , , , |
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| Format: | Preprint |
| Published: |
2025
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| _version_ | 1866911032352440320 |
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| author | Wang, Yiming Sur, Shouvik Xie, Fang Hu, Haoyu Paschen, Silke Natelson, Douglas Si, Qimiao |
| author_facet | Wang, Yiming Sur, Shouvik Xie, Fang Hu, Haoyu Paschen, Silke Natelson, Douglas Si, Qimiao |
| contents | Strange metal behavior has been observed in an expanding list of quantum materials, with heavy fermion metals serving as a prototype setting. Among the intriguing questions is the nature of charge carriers; there is an increasing recognition that the quasiparticles are lost, as captured by Kondo destruction quantum criticality. Among the recent experimental advances is the measurement of shot noise in a heavy-fermion strange metal. We are thus motivated to study current fluctuations by advancing a minimal Bose-Fermi Kondo lattice model, which admits a well-defined large-$N$ limit. Showing that the model in equilibrium captures the essential physics of Kondo destruction, we proceed to derive quantum kinetic equations and compute shot noise to the leading nontrivial order in $1/N$. Our results reveal a strong suppression of the shot noise at the Kondo destruction quantum critical point, thereby providing the understanding of the striking experiment. Broader implications of our results are discussed. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2507_00960 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Suppression of shot noise at a Kondo destruction quantum critical point Wang, Yiming Sur, Shouvik Xie, Fang Hu, Haoyu Paschen, Silke Natelson, Douglas Si, Qimiao Strongly Correlated Electrons Disordered Systems and Neural Networks Mesoscale and Nanoscale Physics Strange metal behavior has been observed in an expanding list of quantum materials, with heavy fermion metals serving as a prototype setting. Among the intriguing questions is the nature of charge carriers; there is an increasing recognition that the quasiparticles are lost, as captured by Kondo destruction quantum criticality. Among the recent experimental advances is the measurement of shot noise in a heavy-fermion strange metal. We are thus motivated to study current fluctuations by advancing a minimal Bose-Fermi Kondo lattice model, which admits a well-defined large-$N$ limit. Showing that the model in equilibrium captures the essential physics of Kondo destruction, we proceed to derive quantum kinetic equations and compute shot noise to the leading nontrivial order in $1/N$. Our results reveal a strong suppression of the shot noise at the Kondo destruction quantum critical point, thereby providing the understanding of the striking experiment. Broader implications of our results are discussed. |
| title | Suppression of shot noise at a Kondo destruction quantum critical point |
| topic | Strongly Correlated Electrons Disordered Systems and Neural Networks Mesoscale and Nanoscale Physics |
| url | https://arxiv.org/abs/2507.00960 |