Shot noise in a phenomenological model of a marginal Fermi liquid
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arXiv
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| Format: | Preprint |
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2024
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| _version_ | 1866918036924006400 |
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| author | Wu, Yi-Ming Yu, Josephine J. Raghu, S. |
| author_facet | Wu, Yi-Ming Yu, Josephine J. Raghu, S. |
| contents | The strange metal is a mysterious non-Fermi liquid which shows linear-in-$T$ resistivity behavior at finite temperatures, and, as found in recent experiment, vanishingly small shot noise in the linear-in-$T$ regime. Here, we investigate the shot noise of a strange metal based on a phenomenological model of marginal Fermi liquid (MFL), where fermions couple to some collective boson mode, leading to $T$-linear scattering rate at finite $T$. It is found that in the diffusive regime where the MFL scattering length is small compared to the system size, the shot noise vanishes, and the thermal noise becomes a temperature- and voltage-independent constant. Introducing additional impurity scattering increases the shot noise, and is probably consistent with the current experiment. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2409_16398 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Shot noise in a phenomenological model of a marginal Fermi liquid Wu, Yi-Ming Yu, Josephine J. Raghu, S. Strongly Correlated Electrons Mesoscale and Nanoscale Physics The strange metal is a mysterious non-Fermi liquid which shows linear-in-$T$ resistivity behavior at finite temperatures, and, as found in recent experiment, vanishingly small shot noise in the linear-in-$T$ regime. Here, we investigate the shot noise of a strange metal based on a phenomenological model of marginal Fermi liquid (MFL), where fermions couple to some collective boson mode, leading to $T$-linear scattering rate at finite $T$. It is found that in the diffusive regime where the MFL scattering length is small compared to the system size, the shot noise vanishes, and the thermal noise becomes a temperature- and voltage-independent constant. Introducing additional impurity scattering increases the shot noise, and is probably consistent with the current experiment. |
| title | Shot noise in a phenomenological model of a marginal Fermi liquid |
| topic | Strongly Correlated Electrons Mesoscale and Nanoscale Physics |
| url | https://arxiv.org/abs/2409.16398 |