NMR studies on the internal structure of high-Tc superconductors and other anorganic compounds

K. Kumagai; K. Kakuyanagi; M. Saitoh; Y. Matsuda; M. Hasegawa; S. Takashima; M. Nohara; H. Takagi

doi:10.1007/s10751-005-9086-3

NMR studies on the internal structure of high-T_c superconductors and other anorganic compounds

K. Kumagai, K. Kakuyanagi, M. Saitoh, Y. Matsuda, M. Hasegawa, S. Takashima, M. Nohara, H. Takagi

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

Abstract

Spatially-resolved NMR is used to probe internal structures in highly correlated superconductors of optimally-doped Tl₂Ba ₂CuO_6+δ (T_c=85 K) and a heavy fermion superconductor CeCoIn₅ (T_c = 2.3 K). The characteristic change of the properties of ²⁰⁵Tl-NMR in the vortex state provides a clear evidence of the antiferromagnetic order in the vortex cores below 20 K in Tl₂Ba₂CuO_6+δ. We also obtain anomalous ¹¹⁵In-NMR spectra of CeCoIn₅, which provides a microscopic evidence for the occurrence of a spatially-modulated superconducting order parameter expected in a Fulde-Ferrel-Larkin-Ovchinnkov (FFLO) state.

Original language	English
Pages (from-to)	87-93
Number of pages	7
Journal	Hyperfine Interactions
Volume	159
Issue number	1-4
DOIs	https://doi.org/10.1007/s10751-005-9086-3
Publication status	Published - Dec 2004
Externally published	Yes

Keywords

Antiferromagnetic order
FFLO state
NMR
Superconductivity
Vortex core

ASJC Scopus subject areas

Atomic and Molecular Physics, and Optics
Nuclear and High Energy Physics
Condensed Matter Physics
Physical and Theoretical Chemistry

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title = "NMR studies on the internal structure of high-Tc superconductors and other anorganic compounds",

abstract = "Spatially-resolved NMR is used to probe internal structures in highly correlated superconductors of optimally-doped Tl2Ba 2CuO6+δ (Tc=85 K) and a heavy fermion superconductor CeCoIn5 (Tc = 2.3 K). The characteristic change of the properties of 205Tl-NMR in the vortex state provides a clear evidence of the antiferromagnetic order in the vortex cores below 20 K in Tl2Ba2CuO6+δ. We also obtain anomalous 115In-NMR spectra of CeCoIn5, which provides a microscopic evidence for the occurrence of a spatially-modulated superconducting order parameter expected in a Fulde-Ferrel-Larkin-Ovchinnkov (FFLO) state.",

keywords = "Antiferromagnetic order, FFLO state, NMR, Superconductivity, Vortex core",

author = "K. Kumagai and K. Kakuyanagi and M. Saitoh and Y. Matsuda and M. Hasegawa and S. Takashima and M. Nohara and H. Takagi",

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AU - Kumagai, K.

AU - Kakuyanagi, K.

AU - Saitoh, M.

AU - Matsuda, Y.

AU - Hasegawa, M.

AU - Takashima, S.

AU - Nohara, M.

AU - Takagi, H.

PY - 2004/12

Y1 - 2004/12

N2 - Spatially-resolved NMR is used to probe internal structures in highly correlated superconductors of optimally-doped Tl2Ba 2CuO6+δ (Tc=85 K) and a heavy fermion superconductor CeCoIn5 (Tc = 2.3 K). The characteristic change of the properties of 205Tl-NMR in the vortex state provides a clear evidence of the antiferromagnetic order in the vortex cores below 20 K in Tl2Ba2CuO6+δ. We also obtain anomalous 115In-NMR spectra of CeCoIn5, which provides a microscopic evidence for the occurrence of a spatially-modulated superconducting order parameter expected in a Fulde-Ferrel-Larkin-Ovchinnkov (FFLO) state.

AB - Spatially-resolved NMR is used to probe internal structures in highly correlated superconductors of optimally-doped Tl2Ba 2CuO6+δ (Tc=85 K) and a heavy fermion superconductor CeCoIn5 (Tc = 2.3 K). The characteristic change of the properties of 205Tl-NMR in the vortex state provides a clear evidence of the antiferromagnetic order in the vortex cores below 20 K in Tl2Ba2CuO6+δ. We also obtain anomalous 115In-NMR spectra of CeCoIn5, which provides a microscopic evidence for the occurrence of a spatially-modulated superconducting order parameter expected in a Fulde-Ferrel-Larkin-Ovchinnkov (FFLO) state.

KW - Antiferromagnetic order

KW - FFLO state

KW - NMR

KW - Superconductivity

KW - Vortex core

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