Microscopic Evidence of Direct Coupling between Magnetic and Superconducting Order Parameters in BaFe2(As1-xPx)2
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概要
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The coexistence of magnetism and superconductivity in the isovalent-P-substituted BaFe2(As1-xPx)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_{\text{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 BaFe2(As1-xPx)2.
- 2012-03-15
著者
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Shibauchi Takasada
Department Of Applied Physics University Of Tokyo
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Matsuda Yuji
Department Of Applied Molecular Bioscience Graduate School Of Bioagricultural Sciences Nagoya University
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Iye Tetsuya
Transformative Research Project on Iron Pnictides (TRIP), Japan Science and Technology Agency (JST), Chiyoda, Tokyo 102-0075, Japan
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NAKAI Yusuke
Transformative Research Project on Iron Pnictides (TRIP), Japan Science and Technology Agency (JST), Chiyoda, Tokyo 102-0075, Japan
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KITAGAWA Shunsaku
Transformative Research Project on Iron Pnictides (TRIP), Japan Science and Technology Agency (JST), Chiyoda, Tokyo 102-0075, Japan
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Ishida Kenji
Transformative Research Project on Iron Pnictides (TRIP), Japan Science and Technology Agency (JST), Chiyoda, Tokyo 102-0075, Japan
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Kasahara Shigeru
Research Center for Low Temperature and Materials Sciences, Kyoto University, Kyoto 606-8502, Japan
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Terashima Takahito
Research Center for Low Temperature and Materials Sciences, Kyoto University, Kyoto 606-8502, Japan
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Matsuda Yuji
Department of Physics, Graduate School of Science, Kyoto University, Kyoto 606-8502, Japan
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Terashima Takahito
Research Center for Low Temperature and Materials Science, Kyoto University, Kyoto 606-8502, Japan
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