Anomalous Flux Line Lattice in CeCoIn_5(Condensed matter: electronic structure and electrical, magnetic, and optical properties)
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概要
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Flux line lattice (FLL) of a quasi-two-dimensional heavy fermion superconductor CeCoIn_5 in perpendicular field was investigated by small-angle neutron scattering technique. A square FLL was observed in magnetic fields up to 3T and at 4T a splitting of diffraction spots was observed, indicating reorganization of the FLL toward a triangular (rhombic) FLL. The FLL form factor is nearly field-independent up to 4T. This is in sharp contrast to conventional superconductors, in which the form factor rapidly decays with increasing magnetic field. This behavior of the form factor, which indicates the anomalous field distribution around the vortex cores, can be attributed to strong Pauli paramagnetic effects and to field-tuned quantum critical point effects.
- 2008-02-15
著者
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Shishido Hiroaki
Department Of Physics Tokyo Metropolitan University
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Kawano-furukawa Hazuki
Graduate School Of Humanities And Sciences Ochanomizu University
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Kawano(furukawa) Hazuki
Graduate School Of Humanities And Sciences Ochanomizu University
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Kawano Hazuki
Neutron Scattering Laboratory Institute For Solid State Physics University Of Tokyo
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Wiedenmann Albrecht
Hahn-meitner-insitut Berlin
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OHIRA(KAWAMURA) Seiko
Academic and Information Board, Ochanomizu University
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LAKE Bella
Hahn-Meitner-Insitut Berlin
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KIEFER Klaus
Hahn-Meitner-Insitut Berlin
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SHIBAUCHI Takasada
Department of Physics, Kyoto University
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MATSUDA Yuji
Department of Physics, Kyoto University
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Matsuda Yuji
Department Of Biology Graduate School Of Sciences Kyushu University
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Matsuda Yuji
Department Of Physics Kyoto University:institute For Solid State Physics University Of Tokyo
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Shishido Hiroaki
Department Of Physics Kyoto University
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Shishido Hiroaki
Department Of Orthopaedic Surgery Fukushima Medical University School Of Medicine
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OHIRA-KAWAMURA Seiko
Academic and Information Board, Ochanomizu University
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Ohira-kawamura Seiko
Academic And Information Board Ochanomizu University
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Ohira(kawamura) Seiko
Academic And Information Board Ochanomizu University
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Shibauchi Takasada
Department Of Applied Physics University Of Tokyo
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Shibauchi Takasada
Department Of Physics Kyoto University
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Matsuda Yuji
Department Of Applied Molecular Bioscience Graduate School Of Bioagricultural Sciences Nagoya University
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