Anisotropy of the superconducting state in Sr2RuO4

C. Rastovski; C. D. Dewhurst; W. J. Gannon; D. C. Peets; H. Takatsu; Y. Maeno; M. Ichioka; K. Machida; M. R. Eskildsen

doi:10.1103/PhysRevLett.111.087003

Anisotropy of the superconducting state in Sr₂RuO₄

C. Rastovski, C. D. Dewhurst, W. J. Gannon, D. C. Peets, H. Takatsu, Y. Maeno, M. Ichioka, K. Machida, M. R. Eskildsen

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

32 Scopus citations

Abstract

Despite intense studies the exact nature of the order parameter in superconducting Sr₂RuO₄ remains unresolved. We have used small-angle neutron scattering to study the vortex lattice in Sr ₂RuO₄ with the field applied close to the basal plane, taking advantage of the transverse magnetization. We measured the intrinsic superconducting anisotropy between the c axis and the Ru-O basal plane (∼60), which greatly exceeds the upper critical field anisotropy (∼20). Our result imposes significant constraints on possible models of triplet pairing in Sr₂RuO₄ and raises questions concerning the direction of the zero spin projection axis.

Original language	English
Article number	087003
Journal	Physical Review Letters
Volume	111
Issue number	8
DOIs	https://doi.org/10.1103/PhysRevLett.111.087003
State	Published - Aug 22 2013

Funding

Funders	Funder number
Japan Society for the Promotion of Science	21340103

ASJC Scopus subject areas

General Physics and Astronomy

Access to Document

10.1103/PhysRevLett.111.087003

Cite this

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title = "Anisotropy of the superconducting state in Sr2RuO4",

abstract = "Despite intense studies the exact nature of the order parameter in superconducting Sr2RuO4 remains unresolved. We have used small-angle neutron scattering to study the vortex lattice in Sr 2RuO4 with the field applied close to the basal plane, taking advantage of the transverse magnetization. We measured the intrinsic superconducting anisotropy between the c axis and the Ru-O basal plane (∼60), which greatly exceeds the upper critical field anisotropy (∼20). Our result imposes significant constraints on possible models of triplet pairing in Sr2RuO4 and raises questions concerning the direction of the zero spin projection axis.",

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AU - Rastovski, C.

AU - Dewhurst, C. D.

AU - Gannon, W. J.

AU - Peets, D. C.

AU - Takatsu, H.

AU - Maeno, Y.

AU - Ichioka, M.

AU - Machida, K.

AU - Eskildsen, M. R.

PY - 2013/8/22

Y1 - 2013/8/22

N2 - Despite intense studies the exact nature of the order parameter in superconducting Sr2RuO4 remains unresolved. We have used small-angle neutron scattering to study the vortex lattice in Sr 2RuO4 with the field applied close to the basal plane, taking advantage of the transverse magnetization. We measured the intrinsic superconducting anisotropy between the c axis and the Ru-O basal plane (∼60), which greatly exceeds the upper critical field anisotropy (∼20). Our result imposes significant constraints on possible models of triplet pairing in Sr2RuO4 and raises questions concerning the direction of the zero spin projection axis.

AB - Despite intense studies the exact nature of the order parameter in superconducting Sr2RuO4 remains unresolved. We have used small-angle neutron scattering to study the vortex lattice in Sr 2RuO4 with the field applied close to the basal plane, taking advantage of the transverse magnetization. We measured the intrinsic superconducting anisotropy between the c axis and the Ru-O basal plane (∼60), which greatly exceeds the upper critical field anisotropy (∼20). Our result imposes significant constraints on possible models of triplet pairing in Sr2RuO4 and raises questions concerning the direction of the zero spin projection axis.

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