Non-Fermi-liquid behavior and anomalous suppression of Landau damping in layered metals close to ferromagnetism

Samuel Ridgway; Chris Hooley

doi:10.1103/PhysRevLett.114.226404

Non-Fermi-liquid behavior and anomalous suppression of Landau damping in layered metals close to ferromagnetism

Samuel Ridgway, Chris Hooley

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Abstract

We analyze the low-energy physics of nearly ferromagnetic metals in two spatial dimensions using the functional renormalization group technique. We find a new low-energy fixed point, at which the fermionic (electronlike) excitations are non-Fermi-liquid (z_ƒ=13/10) and the magnetic fluctuations exhibit an anomalous Landau damping whose rate vanishes as Γ_q∼|q|^3/5 in the low-|q| limit. We discuss this renormalization of the Landau-damping exponent, which is the major novel prediction of our work, and highlight the possible link between that renormalization and neutron-scattering data on UG_e2 and related compounds. Implications of our analysis for YF_e2Al₁₀ are also discussed.

Original language	English
Article number	226404
Number of pages	5
Journal	Physical Review Letters
Volume	114
Issue number	22
DOIs	https://doi.org/10.1103/PhysRevLett.114.226404
Publication status	Published - 5 Jun 2015

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10.1103/PhysRevLett.114.226404

Hooley_2015_PRL_Non-Fermi
© 2015 American Physical Society. Reproduced in accordance with the publisher's author self-archiving policy. Originally published in Physical Review Letters here: http://journals.aps.org/prl/abstract/10.1103/PhysRevLett.114.226404#fulltext
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title = "Non-Fermi-liquid behavior and anomalous suppression of Landau damping in layered metals close to ferromagnetism",

abstract = "We analyze the low-energy physics of nearly ferromagnetic metals in two spatial dimensions using the functional renormalization group technique. We find a new low-energy fixed point, at which the fermionic (electronlike) excitations are non-Fermi-liquid (zƒ=13/10) and the magnetic fluctuations exhibit an anomalous Landau damping whose rate vanishes as Γq∼|q|3/5 in the low-|q| limit. We discuss this renormalization of the Landau-damping exponent, which is the major novel prediction of our work, and highlight the possible link between that renormalization and neutron-scattering data on UGe2 and related compounds. Implications of our analysis for YFe2Al10 are also discussed.",

author = "Samuel Ridgway and Chris Hooley",

note = "Financial support from the EPSRC (U.K.) under Grants No. EP/G03673X/1 (S. P. R.) and No. EP/I031014/1 (C. A. H.) is acknowledged.",

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T1 - Non-Fermi-liquid behavior and anomalous suppression of Landau damping in layered metals close to ferromagnetism

AU - Ridgway, Samuel

AU - Hooley, Chris

N1 - Financial support from the EPSRC (U.K.) under Grants No. EP/G03673X/1 (S. P. R.) and No. EP/I031014/1 (C. A. H.) is acknowledged.

PY - 2015/6/5

Y1 - 2015/6/5

N2 - We analyze the low-energy physics of nearly ferromagnetic metals in two spatial dimensions using the functional renormalization group technique. We find a new low-energy fixed point, at which the fermionic (electronlike) excitations are non-Fermi-liquid (zƒ=13/10) and the magnetic fluctuations exhibit an anomalous Landau damping whose rate vanishes as Γq∼|q|3/5 in the low-|q| limit. We discuss this renormalization of the Landau-damping exponent, which is the major novel prediction of our work, and highlight the possible link between that renormalization and neutron-scattering data on UGe2 and related compounds. Implications of our analysis for YFe2Al10 are also discussed.

AB - We analyze the low-energy physics of nearly ferromagnetic metals in two spatial dimensions using the functional renormalization group technique. We find a new low-energy fixed point, at which the fermionic (electronlike) excitations are non-Fermi-liquid (zƒ=13/10) and the magnetic fluctuations exhibit an anomalous Landau damping whose rate vanishes as Γq∼|q|3/5 in the low-|q| limit. We discuss this renormalization of the Landau-damping exponent, which is the major novel prediction of our work, and highlight the possible link between that renormalization and neutron-scattering data on UGe2 and related compounds. Implications of our analysis for YFe2Al10 are also discussed.

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DO - 10.1103/PhysRevLett.114.226404

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VL - 114

JO - Physical Review Letters

JF - Physical Review Letters

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Non-Fermi-liquid behavior and anomalous suppression of Landau damping in layered metals close to ferromagnetism

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

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Non-Fermi-liquid behavior and anomalous suppression of Landau damping in layered metals close to ferromagnetism

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

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