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T-Linear resistivity from an isotropic planckian scattering rate
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Grissonnanche, Gaël, Fang, Yawen, Legros, Anaëlle, Verret, Simon, Laliberte, Francis, Collignon, Clément, Zhou, Jianshi, Graf, David, Goddard, Paul, Taillefer, Louis and Ramshaw, B. J. (2021) T-Linear resistivity from an isotropic planckian scattering rate. Nature, 595 . pp. 667-672. doi:10.1038/s41586-021-03697-8
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WRAP-T-Linear-resistivity-isotropic-Planckian-scattering-rate-2021.pdf - Accepted Version - Requires a PDF viewer. Download (7Mb) | Preview |
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Official URL: https://doi.org/10.1038/s41586-021-03697-8
Abstract
A variety of ‘strange metals’ exhibit resistivity that decreases linearly with temperature as the temperature decreases to zero1,2,3, in contrast to conventional metals where resistivity decreases quadratically with temperature. This linear-in-temperature resistivity has been attributed to charge carriers scattering at a rate given by ħ/τ = αkBT, where α is a constant of order unity, ħ is the Planck constant and kB is the Boltzmann constant. This simple relationship between the scattering rate and temperature is observed across a wide variety of materials, suggesting a fundamental upper limit on scattering—the ‘Planckian limit’4,5—but little is known about the underlying origins of this limit. Here we report a measurement of the angle-dependent magnetoresistance of La1.6−xNd0.4SrxCuO4—a hole-doped cuprate that shows linear-in-temperature resistivity down to the lowest measured temperatures6. The angle-dependent magnetoresistance shows a well defined Fermi surface that agrees quantitatively with angle-resolved photoemission spectroscopy measurements7 and reveals a linear-in-temperature scattering rate that saturates at the Planckian limit, namely α = 1.2 ± 0.4. Remarkably, we find that this Planckian scattering rate is isotropic, that is, it is independent of direction, in contrast to expectations from ‘hotspot’ models8,9. Our findings suggest that linear-in-temperature resistivity in strange metals emerges from a momentum-independent inelastic scattering rate that reaches the Planckian limit.
| Item Type: | Journal Article | ||||||||||||||||||||||||||||||||||||
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| Subjects: | Q Science > QC Physics | ||||||||||||||||||||||||||||||||||||
| Divisions: | Faculty of Science > Physics | ||||||||||||||||||||||||||||||||||||
| Library of Congress Subject Headings (LCSH): | Condensed matter, Superconductivity, Particles (Nuclear physics) | ||||||||||||||||||||||||||||||||||||
| Journal or Publication Title: | Nature | ||||||||||||||||||||||||||||||||||||
| Publisher: | Nature Publishing | ||||||||||||||||||||||||||||||||||||
| ISSN: | 0028-0836 | ||||||||||||||||||||||||||||||||||||
| Official Date: | 29 July 2021 | ||||||||||||||||||||||||||||||||||||
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| Volume: | 595 | ||||||||||||||||||||||||||||||||||||
| Page Range: | pp. 667-672 | ||||||||||||||||||||||||||||||||||||
| DOI: | 10.1038/s41586-021-03697-8 | ||||||||||||||||||||||||||||||||||||
| Status: | Peer Reviewed | ||||||||||||||||||||||||||||||||||||
| Publication Status: | Published | ||||||||||||||||||||||||||||||||||||
| Access rights to Published version: | Restricted or Subscription Access | ||||||||||||||||||||||||||||||||||||
| RIOXX Funder/Project Grant: |
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