Temperature-dependence of low-energy spin excitation in electron-doped high-Tc superconductor Pr1 - x LaCex CuO4

M. Nakagawa; M. Fujita; K. Yamada

doi:10.1016/j.jpcs.2008.06.047

Temperature-dependence of low-energy spin excitation in electron-doped high-T_c superconductor Pr_{1 - x} LaCe_x CuO₄

M. Nakagawa, M. Fujita, K. Yamada

Materials Property Division

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

Abstract

We studied the temperature-dependences of low-energy spin fluctuations in electron-doped high-T_c cuprates, Pr_{1 - x} LaCe_x CuO₄ (PLCCO) for both superconducting (SC) and long range antiferromagnetic (AF) ordered phases. We clarified the different thermal evolution of local spin susceptibility χ^″ (ω) between the AF and SC samples. For the former sample (x = 0.07), χ^″ (ω) is nearly temperature-independent in the AF ordered state. On the other hand, for the latter samples (x = 0.11 and 0.15), the spectral weight in lower-energy region decreases and the peak-energy in χ^″ (ω) shifts toward high-energy region upon heating. Such different thermal evolution of spin fluctuations between the AF and SC phases is discussed from a viewpoint of degradation of spin correlations by electron-doping which reduces in-plane averaged magnetic interaction.

Original language	English
Pages (from-to)	3156-3159
Number of pages	4
Journal	Journal of Physics and Chemistry of Solids
Volume	69
Issue number	12
DOIs	https://doi.org/10.1016/j.jpcs.2008.06.047
Publication status	Published - 2008 Dec

ASJC Scopus subject areas

Chemistry(all)
Materials Science(all)
Condensed Matter Physics

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title = "Temperature-dependence of low-energy spin excitation in electron-doped high-Tc superconductor Pr1 - x LaCex CuO4",

abstract = "We studied the temperature-dependences of low-energy spin fluctuations in electron-doped high-Tc cuprates, Pr1 - x LaCex CuO4 (PLCCO) for both superconducting (SC) and long range antiferromagnetic (AF) ordered phases. We clarified the different thermal evolution of local spin susceptibility χ″ (ω) between the AF and SC samples. For the former sample (x = 0.07), χ″ (ω) is nearly temperature-independent in the AF ordered state. On the other hand, for the latter samples (x = 0.11 and 0.15), the spectral weight in lower-energy region decreases and the peak-energy in χ″ (ω) shifts toward high-energy region upon heating. Such different thermal evolution of spin fluctuations between the AF and SC phases is discussed from a viewpoint of degradation of spin correlations by electron-doping which reduces in-plane averaged magnetic interaction.",

author = "M. Nakagawa and M. Fujita and K. Yamada",

year = "2008",

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doi = "10.1016/j.jpcs.2008.06.047",

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T1 - Temperature-dependence of low-energy spin excitation in electron-doped high-Tc superconductor Pr1 - x LaCex CuO4

AU - Nakagawa, M.

AU - Fujita, M.

AU - Yamada, K.

PY - 2008/12

Y1 - 2008/12

N2 - We studied the temperature-dependences of low-energy spin fluctuations in electron-doped high-Tc cuprates, Pr1 - x LaCex CuO4 (PLCCO) for both superconducting (SC) and long range antiferromagnetic (AF) ordered phases. We clarified the different thermal evolution of local spin susceptibility χ″ (ω) between the AF and SC samples. For the former sample (x = 0.07), χ″ (ω) is nearly temperature-independent in the AF ordered state. On the other hand, for the latter samples (x = 0.11 and 0.15), the spectral weight in lower-energy region decreases and the peak-energy in χ″ (ω) shifts toward high-energy region upon heating. Such different thermal evolution of spin fluctuations between the AF and SC phases is discussed from a viewpoint of degradation of spin correlations by electron-doping which reduces in-plane averaged magnetic interaction.

AB - We studied the temperature-dependences of low-energy spin fluctuations in electron-doped high-Tc cuprates, Pr1 - x LaCex CuO4 (PLCCO) for both superconducting (SC) and long range antiferromagnetic (AF) ordered phases. We clarified the different thermal evolution of local spin susceptibility χ″ (ω) between the AF and SC samples. For the former sample (x = 0.07), χ″ (ω) is nearly temperature-independent in the AF ordered state. On the other hand, for the latter samples (x = 0.11 and 0.15), the spectral weight in lower-energy region decreases and the peak-energy in χ″ (ω) shifts toward high-energy region upon heating. Such different thermal evolution of spin fluctuations between the AF and SC phases is discussed from a viewpoint of degradation of spin correlations by electron-doping which reduces in-plane averaged magnetic interaction.

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Temperature-dependence of low-energy spin excitation in electron-doped high-T_c superconductor Pr_{1 - x} LaCe_x CuO₄

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