Noncoplanar spin canting in lightly-doped ferromagnetic Kondo lattice model on a triangular lattice
Noncoplanar spin canting in lightly-doped ferromagnetic Kondo lattice model on a triangular lattice
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三角晶格上轻掺杂铁磁 Kondo 晶格模型中的非共面自旋倾斜
DOI:
10.1088/1742-6596/320/1/012059
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发表时间:
2011
期刊:
影响因子:
--
通讯作者:
Y. Akagi and Y. Motome
中科院分区:
文献类型:
--
作者:
M. Yoshida;M. Takigawa;A. Yamamoto;and H. Takagi;Y. Akagi and Y. Motome
Effect of the coupling to mobile carriers on the 120 antiferromagnetic state is investigated in a ferromagnetic Kondo lattice model on a frustrated triangular lattice. Using a variational calculation for various spin orderings up to a four-site unit cell, we identify the ground-state phase diagram with focusing on the lightly-doped region. We find that an electron doping from the band bottom immediately destabilizes a 120 coplanar antiferromagnetic order and induces a noncoplanar three-sublattice ordering accompanied by an intervening phase separation. This noncoplanar phase has an umbrella-type spin configuration with a net magnetic moment and a finite spin scalar chirality. This spin-canting state emerges in competition between the antiferromagnetic superexchange interaction and the ferromagnetic double-exchange interaction under geometrical frustration. In contrast, a hole doping from the band top retains the 120-ordered state up to a finite doping concentration and does not lead to a noncolpanar ordering.
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DOI:
10.1007/b114807
发表时间:
2002
期刊:
--
影响因子:
--
作者:
T. Kaplan;S. Mahanti
通讯作者:
S. Mahanti
影响因子:
8.6
作者:
G. Chern
通讯作者:
G. Chern
影响因子:
8.6
作者:
Machida, Y.;Nakatsuji, S.;Onoda, S.
通讯作者:
Onoda, S.
DOI:
10.1103/physrevb.68.014420
发表时间:
2003
期刊:
影响因子:
--
作者:
Daisaku Ikoma;H. Tsuchiura;J. Inoue
通讯作者:
J. Inoue
影响因子:
3.7
作者:
Takatsu, Hiroshi;Yoshizawa, Hideki;Maeno, Yoshiteru
通讯作者:
Maeno, Yoshiteru