Static and dynamic interaction between pi and d electrons in organic superconductor beta ''-(BEDT-TTF)(4)[(H3O)Fe(C2O4)(3)] center dot C6H5Br studied by C-13 NMR spectroscopy

Ihara, Y.; Futami, Y.; Kawamoto, A.; Matsui, K.; Goto, T.; Sasaki, T.; Benmansour, S.; Gomez-Garcia, C. J.

Static and dynamic interaction between pi and d electrons in organic superconductor beta ''-(BEDT-TTF)(4)[(H3O)Fe(C2O4)(3)] center dot C6H5Br studied by C-13 NMR spectroscopy

Ihara, Y.; Futami, Y.; Kawamoto, A. et al.

Physical Review B, 2016, 94(6), 064504

Permalink : https://hdl.handle.net/2115/63065

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アクセス権	open access
URI	https://hdl.handle.net/2115/63065
タイトル	Static and dynamic interaction between pi and d electrons in organic superconductor beta ''-(BEDT-TTF)(4)[(H3O)Fe(C2O4)(3)] center dot C6H5Br studied by C-13 NMR spectroscopy
著者	Ihara, Y. ; Futami, Y. ; Kawamoto, A. ; Matsui, K. ; Goto, T. ; Sasaki, T. ; Benmansour, S. ; Gomez-Garcia, C. J.
著者名 Ihara, Y.
著者名 Futami, Y.
著者名 Kawamoto, A.
著者名 Matsui, K.
著者名 Goto, T.
著者名 Sasaki, T.
著者名 Benmansour, S.
著者名 Gomez-Garcia, C. J.
言語	英語
発行日	2016-08-05
出版者	American Physical Society (APS)
収録物名	Physical Review B
巻(号)	94(6)
ページ	064504
抄録	We present the results of C-13 NMR experiments in an organic superconductor with localized Fe spins beta ''-(BEDT-TTF)(4)[(H3O)Fe(C2O4)(3)] center dot C6H5Br. We reveal the antiferromagnetic coupling between Fe d spins and pi spins, which creates an exchange field antiparallel to the external field direction at the pi electrons. In addition to the static effects of Fe spins, we show from the nuclear spin-lattice relaxation rate measurement that the magnetic fluctuations generated by Fe spins are suppressed at low temperatures and high magnetic fields. These conditions are suitable to stabilize the field-induced superconductivity by the field compensation mechanism. After the suppression of Fe-spin dynamics by a magnetic field of 19 T, we observed the underlying pi-electron contribution. We discuss a possible anomaly in the pi-electron system.
資源タイプ	学術雑誌論文
出版タイプ	Version of Record
権利情報	©2016 American Physical Society
PISSN	2469-9950
関連情報 (isIdenticalTo)	出版社版DOI https://doi.org/10.1103/PhysRevB.94.064504