Lattice Distortion and Magnetic Quantum Phase Transition in CeFeAs1-xPxO

被引：59
作者：
de la Cruz, Clarina [1 ,2 ]
Hu, W. Z. [3 ]
Li, Shiliang [1 ,3 ]
Huang, Q. [4 ]
Lynn, J. W. [4 ]
Green, M. A. [4 ]
Chen, G. F. [3 ,5 ]
Wang, N. L. [3 ]
Mook, H. A. [2 ]
Si, Qimiao [6 ]
Dai, Pengcheng [1 ,2 ,3 ]
机构：
[1] Univ Tennessee, Dept Phys & Astron, Knoxville, TN 37996 USA
[2] Oak Ridge Natl Lab, Neutron Scattering Sci Div, Oak Ridge, TN 37831 USA
[3] Chinese Acad Sci, Inst Phys, Beijing 100190, Peoples R China
[4] Natl Inst Stand & Technol, NIST Ctr Neutron Res, Gaithersburg, MD 20899 USA
[5] Renmin Univ China, Dept Phys, Beijing 100872, Peoples R China
[6] Rice Univ, Dept Phys & Astron, Houston, TX 77005 USA
来源：
PHYSICAL REVIEW LETTERS | 2010年 / 104卷 / 01期
关键词：
PAIRING SYMMETRY; SUPERCONDUCTIVITY; CRITICALITY; DIAGRAM; STATE;
D O I：
10.1103/PhysRevLett.104.017204
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
We use neutron diffraction to study the structural and magnetic phase diagram of CeFeAs1-xPxO. We find that replacing the larger arsenic with smaller phosphorus in CeFeAs1-xPxO simultaneously suppresses the AFM order and orthorhombic distortion near x = 0.4, thus suggesting the presence of a magnetic quantum critical point. Our detailed structural analysis reveals that the pnictogen height is an important controlling parameter for their electronic and magnetic properties, and may play an important role in electron pairing and superconductivity of these materials.
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页数：4
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