Anisotropic Critical Magnetic Fluctuations in the Ferromagnetic Superconductor UCoGe

C. Stock; D. A. Sokolov; P. Bourges; P. H. Tobash; K. Gofryk; F. Ronning; E. D. Bauer; K. C. Rule; A. D. Huxley

doi:10.1103/PhysRevLett.107.187202

Anisotropic Critical Magnetic Fluctuations in the Ferromagnetic Superconductor UCoGe

C. Stock^*, D. A. Sokolov, P. Bourges, P. H. Tobash, K. Gofryk, F. Ronning, E. D. Bauer, K. C. Rule, A. D. Huxley

^*Corresponding author for this work

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

38 Citations (Scopus)

Abstract

We report neutron scattering measurements of critical magnetic excitations in the weakly ferromagnetic superconductor UCoGe. The strong non-Landau damping of the excitations we observe, although unusual, has been found in another related ferromagnet, UGe2 at zero pressure. However, we also find that there is a significant anisotropy of the magnetic correlation length in UCoGe that contrasts with an almost isotropic length for UGe2. The values of the magnetic correlation length and damping are found to be compatible with superconductivity on small Fermi-surface pockets. The anisotropy may be important to explain why UCoGe is a superconductor at zero pressure while UGe2 is not.

Original language	English
Article number	187202
Number of pages	5
Journal	Physical Review Letters
Volume	107
Issue number	18
DOIs	https://doi.org/10.1103/PhysRevLett.107.187202
Publication status	Published - 27 Oct 2011

Keywords

URHGE
COEXISTENCE
STATE
UGE2

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10.1103/PhysRevLett.107.187202

Topological Protection and NonEquilibriu: Topological Protection and NonEquilibrium States in Strongly Correlated Electron Systems
Wahl, P. (PI), Baumberger, F. (CoI), Davis, J. C. (CoI), Green, A. (CoI), Hooley, C. (CoI), Keeling, J. M. J. (CoI) & Mackenzie, A. (CoI)
EPSRC
1/09/11 → 31/08/17
Project: Standard

Cite this

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title = "Anisotropic Critical Magnetic Fluctuations in the Ferromagnetic Superconductor UCoGe",

abstract = "We report neutron scattering measurements of critical magnetic excitations in the weakly ferromagnetic superconductor UCoGe. The strong non-Landau damping of the excitations we observe, although unusual, has been found in another related ferromagnet, UGe2 at zero pressure. However, we also find that there is a significant anisotropy of the magnetic correlation length in UCoGe that contrasts with an almost isotropic length for UGe2. The values of the magnetic correlation length and damping are found to be compatible with superconductivity on small Fermi-surface pockets. The anisotropy may be important to explain why UCoGe is a superconductor at zero pressure while UGe2 is not.",

keywords = "URHGE, COEXISTENCE, STATE, UGE2",

author = "C. Stock and Sokolov, {D. A.} and P. Bourges and Tobash, {P. H.} and K. Gofryk and F. Ronning and Bauer, {E. D.} and Rule, {K. C.} and Huxley, {A. D.}",

year = "2011",

month = oct,

day = "27",

doi = "10.1103/PhysRevLett.107.187202",

language = "English",

volume = "107",

journal = "Physical Review Letters",

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T1 - Anisotropic Critical Magnetic Fluctuations in the Ferromagnetic Superconductor UCoGe

AU - Stock, C.

AU - Sokolov, D. A.

AU - Bourges, P.

AU - Tobash, P. H.

AU - Gofryk, K.

AU - Ronning, F.

AU - Bauer, E. D.

AU - Rule, K. C.

AU - Huxley, A. D.

PY - 2011/10/27

Y1 - 2011/10/27

N2 - We report neutron scattering measurements of critical magnetic excitations in the weakly ferromagnetic superconductor UCoGe. The strong non-Landau damping of the excitations we observe, although unusual, has been found in another related ferromagnet, UGe2 at zero pressure. However, we also find that there is a significant anisotropy of the magnetic correlation length in UCoGe that contrasts with an almost isotropic length for UGe2. The values of the magnetic correlation length and damping are found to be compatible with superconductivity on small Fermi-surface pockets. The anisotropy may be important to explain why UCoGe is a superconductor at zero pressure while UGe2 is not.

AB - We report neutron scattering measurements of critical magnetic excitations in the weakly ferromagnetic superconductor UCoGe. The strong non-Landau damping of the excitations we observe, although unusual, has been found in another related ferromagnet, UGe2 at zero pressure. However, we also find that there is a significant anisotropy of the magnetic correlation length in UCoGe that contrasts with an almost isotropic length for UGe2. The values of the magnetic correlation length and damping are found to be compatible with superconductivity on small Fermi-surface pockets. The anisotropy may be important to explain why UCoGe is a superconductor at zero pressure while UGe2 is not.

KW - URHGE

KW - COEXISTENCE

KW - STATE

KW - UGE2

U2 - 10.1103/PhysRevLett.107.187202

DO - 10.1103/PhysRevLett.107.187202

M3 - Article

SN - 0031-9007

VL - 107

JO - Physical Review Letters

JF - Physical Review Letters

IS - 18

M1 - 187202

ER -

Anisotropic Critical Magnetic Fluctuations in the Ferromagnetic Superconductor UCoGe

Abstract

Keywords

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

Cite this