抄録
We have investigated the Hall effect in the geometrically frustrated Kondo lattice Pr2Ir2O7. In its spin-liquid-like paramagnetic regime, the Hall resistivity ρxy is found to increase logarithmically on cooling. Moreover, in this low temperature region, the field dependence of the Hall conductivity σxy shows a large enhancement up to 30Ω-1cm-1 as well as a nonmonotonic change with the magnetization. Our results are far different from the anomalous Hall effect due to the spin-orbit coupling observed in ordinary magnetic conductors. We discuss the possible spin-chirality effect in the Ir 5d conduction band due to the noncoplanar texture of Pr 111 Ising-like moments.
本文言語 | 英語 |
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論文番号 | 057203 |
ジャーナル | Physical Review Letters |
巻 | 98 |
号 | 5 |
DOI | |
出版ステータス | 出版済み - 2007 |
ASJC Scopus 主題領域
- 物理学および天文学一般