Microscopic evidence of direct coupling between magnetic and superconducting order parameters in BaFe 2(As 1-xP x) 2

Tetsuya Iye; Yusuke Nakai; Shunsaku Kitagawa; Kenji Ishida; Shigeru Kasahara; Takasada Shibauchi; Yuji Matsuda; Takahito Terashima

doi:10.1143/JPSJ.81.033701

Microscopic evidence of direct coupling between magnetic and superconducting order parameters in BaFe ₂(As _1-xP _x) ₂

Tetsuya Iye, Yusuke Nakai, Shunsaku Kitagawa, Kenji Ishida, Shigeru Kasahara, Takasada Shibauchi, Yuji Matsuda, Takahito Terashima

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

21 Citations (Scopus)

Abstract

The coexistence of magnetism and superconductivity in the isovalent-P-substituted BaFe ₂(As _1-xP _x) ₂ has been investigated microscopically by ³¹P-NMR measurements. We found that superconducting (SC) transition occurs in a magnetic region with static ordered moments and that the moments are reduced below the SC transition temperature T _c in the samples near the phase boundary of magnetism and superconductivity. Our results indicate that magnetism and superconductivity coexist spatially but compete with each other on the same Fermi surfaces. The coexistence state is qualitatively different from that observed in other unconventional superconductors and gives a strict constraint on the theoretical model for superconductivity in BaFe ₂(As _1-xP _x) ₂.

Original language	English
Article number	033701
Journal	journal of the physical society of japan
Volume	81
Issue number	3
DOIs	https://doi.org/10.1143/JPSJ.81.033701
Publication status	Published - Mar 2012
Externally published	Yes

Keywords

Coexistence between magnetism and superconductivity
Iron-pnictide superconductors
NMR

ASJC Scopus subject areas

Physics and Astronomy(all)

Access to Document

10.1143/JPSJ.81.033701

Cite this

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title = "Microscopic evidence of direct coupling between magnetic and superconducting order parameters in BaFe 2(As 1-xP x) 2 ",

abstract = "The coexistence of magnetism and superconductivity in the isovalent-P-substituted BaFe 2(As 1-xP x) 2 has been investigated microscopically by 31P-NMR measurements. We found that superconducting (SC) transition occurs in a magnetic region with static ordered moments and that the moments are reduced below the SC transition temperature T c in the samples near the phase boundary of magnetism and superconductivity. Our results indicate that magnetism and superconductivity coexist spatially but compete with each other on the same Fermi surfaces. The coexistence state is qualitatively different from that observed in other unconventional superconductors and gives a strict constraint on the theoretical model for superconductivity in BaFe 2(As 1-xP x) 2.",

keywords = "Coexistence between magnetism and superconductivity, Iron-pnictide superconductors, NMR",

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T1 - Microscopic evidence of direct coupling between magnetic and superconducting order parameters in BaFe 2(As 1-xP x) 2

AU - Iye, Tetsuya

AU - Nakai, Yusuke

AU - Kitagawa, Shunsaku

AU - Ishida, Kenji

AU - Kasahara, Shigeru

AU - Shibauchi, Takasada

AU - Matsuda, Yuji

AU - Terashima, Takahito

PY - 2012/3

Y1 - 2012/3

N2 - The coexistence of magnetism and superconductivity in the isovalent-P-substituted BaFe 2(As 1-xP x) 2 has been investigated microscopically by 31P-NMR measurements. We found that superconducting (SC) transition occurs in a magnetic region with static ordered moments and that the moments are reduced below the SC transition temperature T c in the samples near the phase boundary of magnetism and superconductivity. Our results indicate that magnetism and superconductivity coexist spatially but compete with each other on the same Fermi surfaces. The coexistence state is qualitatively different from that observed in other unconventional superconductors and gives a strict constraint on the theoretical model for superconductivity in BaFe 2(As 1-xP x) 2.

AB - The coexistence of magnetism and superconductivity in the isovalent-P-substituted BaFe 2(As 1-xP x) 2 has been investigated microscopically by 31P-NMR measurements. We found that superconducting (SC) transition occurs in a magnetic region with static ordered moments and that the moments are reduced below the SC transition temperature T c in the samples near the phase boundary of magnetism and superconductivity. Our results indicate that magnetism and superconductivity coexist spatially but compete with each other on the same Fermi surfaces. The coexistence state is qualitatively different from that observed in other unconventional superconductors and gives a strict constraint on the theoretical model for superconductivity in BaFe 2(As 1-xP x) 2.

KW - Coexistence between magnetism and superconductivity

KW - Iron-pnictide superconductors

KW - NMR

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