Evolution of Fermi Surface Properties in CexLa1−xB6 and PrxLa1−xB6
Evolution of Fermi Surface Properties in CexLa1−xB6 and PrxLa1−xB6
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CexLa1−xB6 和 PrxLa1−xB6 中费米表面性质的演变
DOI：
10.1143/jpsj.75.114704
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发表时间：
2006
影响因子：
1.7
通讯作者：
S. Kunii
中科院分区：
文献类型：
--
作者：
M. Endo;S. Nakamura;T. Isshiki;N. Kimura;T. Nojima;H. Aoki;H. Harima;S. Kunii
本文报道了La B 6，Ce xLa 1- x B 6（x = 0.1，0.25，0.5，0.75，1.0）和Pr xLa 1-x B 6（x = 0.25，0.5，0.75，1.0）的费米面性质的de Haas-van Alphen（dHvA）效应测量，特别注意费米面性质的自旋依赖性。Ce x La 1- x B 6的费米面形状和尺寸随Ce浓度变化很大，而Pr x La 1- x B 6的费米面形状和尺寸在x = 0.75时变化很小，Pr B 6的费米面分裂为上下自旋费米面. Ce x La 1- x B 6的有效质量随Ce浓度的增加而显著增加，并与Ce离子的数目几乎成正比，而Pr x La 1- x B 6的有效质量随Pr浓度的增加而略有增加. Ce x La 1- x B 6的有效质量对电场有很强的依赖性，并随电场的减小而增大，而Pr x La 1- x B 6的有效质量随电场的减小而增大。一个自旋方向的传导电子对dHvA信号的贡献.
We report the de Haas–van Alphen (dHvA) effect measurements of the Fermi surface properties in LaB 6 , Ce x La 1- x B 6 ( x = 0.1, 0.25, 0.5, 0.75, 1.0) and Pr x La 1- x B 6 ( x = 0.25, 0.5, 0.75, 1.0) with particular attention to the spin dependence of the Fermi surface properties. The Fermi surface shape and dimension of Ce x La 1- x B 6 change considerably with Ce concentration, while those of Pr x La 1- x B 6 change very slightly up to x = 0.75, and in PrB 6 the Fermi surface splits into the up and down spin Fermi surfaces. The effective mass of Ce x La 1- x B 6 increases considerably with Ce concentration and is nearly proportional to the number of Ce ions, whereas that of Pr x La 1- x B 6 increases slightly with Pr concentration. In Ce x La 1- x B 6 the effective mass depends very strongly on field and increases divergently with decreasing field, while that of Pr x La 1- x B 6 increases slightly with decreasing field. The contribution to the dHvA signal from the conduction electrons of one spin dire...