Evidence for hydrodynamic electron flow in PdCoO2

Philip J.W. Moll; Pallavi Kushwaha; Nabhamila Nandi; Burkhard Schmidt; Andrew Mackenzie

doi:10.1126/science.aac8385

Evidence for hydrodynamic electron flow in PdCoO₂

Philip J.W. Moll, Pallavi Kushwaha, Nabhamila Nandi, Burkhard Schmidt, Andrew Mackenzie

Research output: Contribution to journal › Article › peer-review

Abstract

Electron transport is conventionally determined by the momentum-relaxing scattering of electrons by the host solid and its excitations. Hydrodynamic fluid flow through channels, in contrast, is determined partly by the viscosity of the fluid, which is governed by momentum-conserving internal collisions. A long-standing question in the physics of solids has been whether the viscosity of the electron fluid plays an observable role in determining the resistance. We report experimental evidence that the resistance of restricted channels of the ultrapure two-dimensional metal palladium coboltate (PdCoO₂) has a large viscous contribution. Comparison with theory allows an estimate of the electronic viscosity in the range between 6×10^–3 kg(ms)^–1 and 3×10^–4 kg(ms)^–1, versus 1×10^–3 kg(ms)^–1 for water at room temperature.

Original language	English
Pages (from-to)	1061-1064
Number of pages	5
Journal	Science
Volume	351
Issue number	6277
Early online date	11 Feb 2016
DOIs	https://doi.org/10.1126/science.aac8385
Publication status	Published - 4 Mar 2016

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10.1126/science.aac8385

Mackenzie_2016_Science_Evidence_AAM
Copyright 2016 the Authors. This work is made available online in accordance with the publisher’s policies. This is the author created, accepted version manuscript following peer review and may differ slightly from the final published version. The final published version of this work is available at https://doi.org/10.1126/science.aac8385
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Cite this

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title = "Evidence for hydrodynamic electron flow in PdCoO2",

abstract = "Electron transport is conventionally determined by the momentum-relaxing scattering of electrons by the host solid and its excitations. Hydrodynamic fluid flow through channels, in contrast, is determined partly by the viscosity of the fluid, which is governed by momentum-conserving internal collisions. A long-standing question in the physics of solids has been whether the viscosity of the electron fluid plays an observable role in determining the resistance. We report experimental evidence that the resistance of restricted channels of the ultrapure two-dimensional metal palladium coboltate (PdCoO2) has a large viscous contribution. Comparison with theory allows an estimate of the electronic viscosity in the range between 6×10–3 kg(ms)–1 and 3×10–4 kg(ms)–1, versus 1×10–3 kg(ms)–1 for water at room temperature.",

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T1 - Evidence for hydrodynamic electron flow in PdCoO2

AU - Moll, Philip J.W.

AU - Kushwaha, Pallavi

AU - Nandi, Nabhamila

AU - Schmidt, Burkhard

AU - Mackenzie, Andrew

PY - 2016/3/4

Y1 - 2016/3/4

N2 - Electron transport is conventionally determined by the momentum-relaxing scattering of electrons by the host solid and its excitations. Hydrodynamic fluid flow through channels, in contrast, is determined partly by the viscosity of the fluid, which is governed by momentum-conserving internal collisions. A long-standing question in the physics of solids has been whether the viscosity of the electron fluid plays an observable role in determining the resistance. We report experimental evidence that the resistance of restricted channels of the ultrapure two-dimensional metal palladium coboltate (PdCoO2) has a large viscous contribution. Comparison with theory allows an estimate of the electronic viscosity in the range between 6×10–3 kg(ms)–1 and 3×10–4 kg(ms)–1, versus 1×10–3 kg(ms)–1 for water at room temperature.

AB - Electron transport is conventionally determined by the momentum-relaxing scattering of electrons by the host solid and its excitations. Hydrodynamic fluid flow through channels, in contrast, is determined partly by the viscosity of the fluid, which is governed by momentum-conserving internal collisions. A long-standing question in the physics of solids has been whether the viscosity of the electron fluid plays an observable role in determining the resistance. We report experimental evidence that the resistance of restricted channels of the ultrapure two-dimensional metal palladium coboltate (PdCoO2) has a large viscous contribution. Comparison with theory allows an estimate of the electronic viscosity in the range between 6×10–3 kg(ms)–1 and 3×10–4 kg(ms)–1, versus 1×10–3 kg(ms)–1 for water at room temperature.

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U2 - 10.1126/science.aac8385

DO - 10.1126/science.aac8385

M3 - Article

SN - 0036-8075

VL - 351

SP - 1061

EP - 1064

JO - Science

JF - Science

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ER -

Evidence for hydrodynamic electron flow in PdCoO₂

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Topological Protection and NonEquilibriu: Topological Protection and NonEquilibrium States in Strongly Correlated Electron Systems

Andrew Mackenzie

Data underpinning - Evidence for hydrodynamic electron flow in PdCoO2

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Evidence for hydrodynamic electron flow in PdCoO2

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Topological Protection and NonEquilibriu: Topological Protection and NonEquilibrium States in Strongly Correlated Electron Systems

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Data underpinning - Evidence for hydrodynamic electron flow in PdCoO2

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Evidence for hydrodynamic electron flow in PdCoO₂