Ce-substitution effects on the spin excitation spectra in Pr1.4-xLa0.6CexCuO4+δ

Ce-substitution effects on the spin excitation spectra in Pr1.4-xLa0.6CexCuO4+δ
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Ce 取代对 Pr1.4-xLa0.6CexCuO4+δ 中自旋激发光谱的影响

DOI:
10.1088/1742-6596/807/5/052009
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发表时间:
2017
期刊:
Journal of Physics: Conference Series
影响因子:
--
通讯作者:
Fujita M
Fujita M
中科院分区:
--
文献类型:
--
作者:
Asano S;Tsutsumi K;Sato K;Fujita M

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在x= 0,0.08和0.18的情况下,对电子掺杂Pr 1.4-x La 0.6 Ce x cuo4 + δ的生长单晶进行了非弹性中子散射测量。我们成功地在所有样品中观察到高达300meV的自旋激发光谱。在母体和电子掺杂样品中,在40 meV以下低能区磁区中心(0.5,0.5)处观察到磁信号。在100 meV以上的高能区,母样品的恒能谱中出现了反映自旋波激发的双峰结构,而ce掺杂样品的恒能谱中出现了以(0.5,0.5)为中心的单峰。这些结果表明,掺杂后自旋激发光谱的色散变得更加陡峭。此外,我们还发现ce取代能显著降低磁性强度。
We performed inelastic neutron scattering measurements on as-grown single crystals of electron-doped Pr 1.4-x La 0.6 Ce x CuO 4+ δ with x= 0, 0.08 and 0.18. We succeeded in observing the spin excitation spectra up to 300meV in the all samples. In both parent and electron-doped samples, a magnetic signal was observed at the magnetic zone center (0.5, 0.5) in the low-energy region below 40 meV. In the high-energy region above 100 meV, a double-peak structure reflecting the spin-wave excitation was detected in the constant-energy spectrum for the parent sample, while a single broad peak centered at (0.5, 0.5) was observed for the Ce-doped samples. These results suggest that the dispersion of spin excitation spectra become steeper upon doping. Furthermore, we newly found a drastic reduction of the magnetic intensity with Ce-substitution.
首次演示利用多次入射能量进行非弹性中子散射测量的新方法
DOI: --
发表时间: 2009
期刊: J.Phys.Soc.Jpn. 78
影响因子: --
作者:
尾山公一;ほか;曽我部正博;横尾哲也
通讯作者: 横尾哲也
DOI: 10.1143/jpsj.75.093704
发表时间: 2006-09-01
影响因子: 1.7
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通讯作者: Yamada, Kazuyoshi
T_c=21K 的电子掺杂超导 Pr_0.88LaCe_0.12CuO_<4-δ> 中的高能自旋激发
DOI: --
发表时间: 2006
期刊: Phys.Rev.Lett. 96
影响因子: --
作者:
S.D.Wilson;Shiliang Li;H.Woo;P.Dai;H.A.Mook;C.D.Frost;Seiki Komiya;Yoichi Ando
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