Spin Dynamics in Quasi-One-Dimensional Conductor β-Na_<0.33>V_2O_5 : ^<51>V Nuclear Spin-Lattice Relaxation Measurements(Condensed matter: electronic structure and electrical, magnetic, and optical properties)
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概要
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The ^<51>V nuclear spin-lattice relaxation rate 1/T_1 has been measured in various magnetic fields H to study the spin dynamics in the metallic phase of the quasi-one-dimensional conductor β-Na_<0.33>V_2O_5, which undergoes the metal-insulator transition at T_<MI>〜135K. We observe an H dependence of 1/T_1T owing to the spin diffusion that is expected to appear in one-dimensional magnetic systems. The H dependence allows us to separate 1/T_1T into the q〜0 and q〜2k_F contributions. The q〜0 and q〜2k_F contributions at the V2 site are suppressed by the Na order-disorder transition at T_<Na>〜242K, whereas the dominant q〜2k_F contributions at the V3 site are not suppressed at T_<Na>. We discuss the spin dynamics based on the Luttinger liquid theory.
- 社団法人日本物理学会の論文
- 2008-10-15
著者
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UEDA Yutaka
Institute for Solid State Physics, University of Tokyo
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Ueda Yutaka
Institute For Solid State Physics University Of Tokyo
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ITOH Masayuki
Department of Physics,Faculty of Science,Chiba University
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Yamauchi Touru
Institute For Solid State Physics University Of Tokyo
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Itoh Masayuki
Department Of Mental Retardation And Birth Defect Research National Center Of Neurology And Psychiat
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Itoh Masayuki
Department Of Physics Graduate School Of Science Nagoya University
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YAMAUCHI Ichihiro
Department of Physics, Graduate School of Science, Nagoya University
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Itoh Masayuki
Department Of Applied Chemistry Kanagawa Institute Of Technology
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Ueda Yutaka
Institute For Solid State Physic The University Of Tokyo
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Yamauchi Touru
Institute For Solid State Physics The University Of Tokyo
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Yamauchi Ichihiro
Department Of Physics Graduate School Of Science Nagoya University
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