Conformally invariant charge fluctuations in a strange metal
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2024
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| author | Guo, Xuefei Chen, Jin Hoveyda-Marashi, Farzaneh Bettler, Simon L. Chaudhuri, Dipanjan Kengle, Caitlin S. Schneeloch, John A. Zhang, Ruidan Gu, Genda Chiang, Tai-Chang Tsvelik, Alexei M. Faulkner, Thomas Phillips, Philip W. Abbamonte, Peter |
| author_facet | Guo, Xuefei Chen, Jin Hoveyda-Marashi, Farzaneh Bettler, Simon L. Chaudhuri, Dipanjan Kengle, Caitlin S. Schneeloch, John A. Zhang, Ruidan Gu, Genda Chiang, Tai-Chang Tsvelik, Alexei M. Faulkner, Thomas Phillips, Philip W. Abbamonte, Peter |
| contents | The strange metal is a peculiar phase of matter in which the electron scattering rate, $τ^{-1} \sim k_B T/\hbar$, which determines the electrical resistance, is universal across a wide family of materials and determined only by fundamental constants. In 1989, theorists hypothesized that this universality would manifest as scale-invariant behavior in the dynamic charge susceptibility, $χ''(q,ω)$. Here, we present momentum-resolved inelastic electron scattering measurements of the strange metal Bi$_2$Sr$_2$CaCu$_2$O$_{8+x}$ showing that the susceptibility has the scale-invariant form $χ''(q,ω) = T^{-ν} f(ω/T)$, with exponent $ν= 0.93$. We find the response is consistent with conformal invariance, meaning the dynamics may be thought of as occurring on a circle of radius $1/T$ in imaginary time, characterized by conformal dimension $Δ= 0.05$. Our study indicates that the strange metal is a universal phenomenon whose properties are not determined by microscopic properties of a particular material. |
| format | Preprint |
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arxiv_https___arxiv_org_abs_2411_11164 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Conformally invariant charge fluctuations in a strange metal Guo, Xuefei Chen, Jin Hoveyda-Marashi, Farzaneh Bettler, Simon L. Chaudhuri, Dipanjan Kengle, Caitlin S. Schneeloch, John A. Zhang, Ruidan Gu, Genda Chiang, Tai-Chang Tsvelik, Alexei M. Faulkner, Thomas Phillips, Philip W. Abbamonte, Peter Strongly Correlated Electrons High Energy Physics - Phenomenology The strange metal is a peculiar phase of matter in which the electron scattering rate, $τ^{-1} \sim k_B T/\hbar$, which determines the electrical resistance, is universal across a wide family of materials and determined only by fundamental constants. In 1989, theorists hypothesized that this universality would manifest as scale-invariant behavior in the dynamic charge susceptibility, $χ''(q,ω)$. Here, we present momentum-resolved inelastic electron scattering measurements of the strange metal Bi$_2$Sr$_2$CaCu$_2$O$_{8+x}$ showing that the susceptibility has the scale-invariant form $χ''(q,ω) = T^{-ν} f(ω/T)$, with exponent $ν= 0.93$. We find the response is consistent with conformal invariance, meaning the dynamics may be thought of as occurring on a circle of radius $1/T$ in imaginary time, characterized by conformal dimension $Δ= 0.05$. Our study indicates that the strange metal is a universal phenomenon whose properties are not determined by microscopic properties of a particular material. |
| title | Conformally invariant charge fluctuations in a strange metal |
| topic | Strongly Correlated Electrons High Energy Physics - Phenomenology |
| url | https://arxiv.org/abs/2411.11164 |