Intrinsic properties of stoichiometric LaFePO

被引：105

作者：

McQueen, T. M. ^{[1
]}

Regulacio, M. ^{[1
]}

Williams, A. J. ^{[1
]}

Huang, Q. ^{[2
]}

Lynn, J. W. ^{[2
]}

Hor, Y. S. ^{[1
]}

West, D. V. ^{[1
]}

Green, M. A. ^{[2
,3
]}

Cava, R. J. ^{[1
]}

机构：

[1] Princeton Univ, Dept Chem, Princeton, NJ 08544 USA

[2] NIST, Ctr Neutron Res, Gaithersburg, MD 20899 USA

[3] Univ Maryland, Dept Mat Sci & Engn, College Pk, MD 20742 USA

来源：

PHYSICAL REVIEW B | 2008年 / 78卷 / 02期

关键词：

D O I：

10.1103/PhysRevB.78.024521

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

DC and ac magnetization, resistivity, specific-heat, and neutron-diffraction data reveal that stoichiometric LaFePO is metallic and non-superconducting above T=0.35 K, with gamma=12.5 mJ/mol K-2. Neutron-diffraction data at room temperature and T=10 K are well described by the stoichiometric, tetragonal ZrCuSiAs structure, and show no signs of structural distortions or long-range magnetic ordering to an estimated detectability limit of 0.07 mu(B)/Fe. We propose a model based on the shape of the iron-pnictide tetrahedron that explains the differences between LaFePO and LaFeAsO, the parent compound of the recently discovered high-Tc oxyarsenides, which, in contrast, shows both structural and spin-density wave transitions.

引用

页数：7

共 43 条

[1]

BRUENING EM, ARXIV08043250

[2]

CARLO JP, ARXIV08052186

[3] Electron energy-loss spectroscopy and ab initio electronic structure of the LaOFeP superconductor [J].

Che, Renchao ;

Xiao, Ruijuan ;

Liang, Chongyun ;

Yang, Huaixin ;

Ma, Chao ;

Shi, Honglong ;

Li, Jianqi .

PHYSICAL REVIEW B, 2008, 77 (18)

[4]

CHEN F, PHYS REV LETT IN PRE

[5]

CHEN F, ARXIV08030128

[6] Superconductivity at 41 K and its competition with spin-density-wave instability in layered CeO1-xFxFeAs [J].

Chen, G. F. ;

Li, Z. ;

Wu, D. ;

Li, G. ;

Hu, W. Z. ;

Dong, J. ;

Zheng, P. ;

Luo, J. L. ;

Wang, N. L. .

PHYSICAL REVIEW LETTERS, 2008, 100 (24)

[7]

Chen GF, 2008, CHINESE PHYS LETT, V25, P2235, DOI 10.1088/0256-307X/25/6/086

[8] A BCS-like gap in the superconductor SmFeAsO0.85F0.15 [J].

Chen, T. Y. ;

Tesanovic, Z. ;

Liu, R. H. ;

Chen, X. H. ;

Chien, C. L. .

NATURE, 2008, 453 (7199) :1224-1227

[9] Superconductivity at 43 K in SmFeAsO1-xFx [J].

Chen, X. H. ;

Wu, T. ;

Wu, G. ;

Liu, R. H. ;

Chen, H. ;

Fang, D. F. .

NATURE, 2008, 453 (7196) :761-762

[10] Superconductivity at 36 K in gadolinium-arsenide oxides GdO1-xFxFeAs [J].

Cheng Peng ;

Fang Lei ;

Yang Huan ;

Zhu XiYu ;

Mu Gang ;

Luo HuiQian ;

Wang ZhaoSheng ;

Wen HaiHu .

SCIENCE IN CHINA SERIES G-PHYSICS MECHANICS & ASTRONOMY, 2008, 51 (06) :719-722

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