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篇目详细内容 |
【篇名】 |
Magneto-thermopower of parent compound LaFeAsO |
【刊名】 |
Frontiers of Physics in China |
【刊名缩写】 |
Front. Phys. China |
【ISSN】 |
1673-3487 |
【EISSN】 |
1673-3606 |
【DOI】 |
10.1007/s11467-009-0015-9 |
【出版社】 |
Higher Education Press and Springer-Verlag |
【出版年】 |
2009 |
【卷期】 |
4
卷4期 |
【页码】 |
455-458
页,共
4
页 |
【作者】 |
Zeng-wei ZHU(朱增伟);
Qian TAO(陶前);
Yu-ke LI(李玉科);
Mi HE(何咪);
Guang-han CAO(曹光旱);
Zhu-an
XU(许祝安);
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【关键词】 |
iron arsenide superconductor; parent compound; thermopower; spin density wave; magnetic field enhanced gapping |
【摘要】 |
We report the effect of magnetic field on the transport properties of polycrystalline parent compound LaFeAsO. The magnetic field has no significant influence on the structural phase transitions or spin density wave (SDW) ordering of small moments on iron, but causes large positive magento-resistance below 100K. Meanwhile, the absolute magnitude of thermopower, which is negative, increases remarkably with increasing magnetic field below 100K. Such a large positive magneto-thermopower was first reported in this iron arsenide. The result suggests that there could exist an enhancement of SDW gapping in holelike Fermi surface. |
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