Unified origin for superconductivity and 3D magnetism in Nax CoO2

K. Kuroki; S. Okubo; T. Nojima; H. Usui; R. Arita; S. Onari; Y. Tanaka

doi:10.1016/j.physb.2007.10.352

Unified origin for superconductivity and 3D magnetism in Na_x CoO₂

K. Kuroki, S. Okubo, T. Nojima, H. Usui, R. Arita, S. Onari, Y. Tanaka

Graduate School of Natural Science and Technology

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

Abstract

We argue that the spin fluctuations that give rise to superconductivity in Na_x CoO₂ · y H₂ O and the 3D magnetism in the non-hydrated Na_x CoO₂ share the same origin. Due to the local minimum of the a_{1 g} band at the Γ point, inner and outer portions of the Fermi surface arise, where the nesting between the two results in these interesting phenomena.

Original language	English
Pages (from-to)	1151-1153
Number of pages	3
Journal	Physica B: Condensed Matter
Volume	403
Issue number	5-9
DOIs	https://doi.org/10.1016/j.physb.2007.10.352
Publication status	Published - Apr 1 2008

Keywords

Fermi surface
Magnetism
Na CoO
Superconductivity

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics
Electrical and Electronic Engineering

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abstract = "We argue that the spin fluctuations that give rise to superconductivity in Nax CoO2 · y H2 O and the 3D magnetism in the non-hydrated Nax CoO2 share the same origin. Due to the local minimum of the a1 g band at the Γ point, inner and outer portions of the Fermi surface arise, where the nesting between the two results in these interesting phenomena.",

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AU - Kuroki, K.

AU - Okubo, S.

AU - Nojima, T.

AU - Usui, H.

AU - Arita, R.

AU - Onari, S.

AU - Tanaka, Y.

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AB - We argue that the spin fluctuations that give rise to superconductivity in Nax CoO2 · y H2 O and the 3D magnetism in the non-hydrated Nax CoO2 share the same origin. Due to the local minimum of the a1 g band at the Γ point, inner and outer portions of the Fermi surface arise, where the nesting between the two results in these interesting phenomena.

KW - Fermi surface

KW - Magnetism

KW - Na CoO

KW - Superconductivity

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