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题名: Pressure- and temperature-induced structural phase transitions of CaFe2As2 and BaFe2As2 studied in the Hund
作者: Ji, W ;  Yan, XW ;  Lu, ZY
刊名: PHYSICAL REVIEW B
出版日期: 2011
卷号: 83, 期号:13, 页码:132504
关键词: SUPERCONDUCTIVITY
学科分类: Physics
通讯作者: Ji, W (reprint author), Renmin Univ China, Dept Phys, Beijing 100872, Peoples R China.
部门归属: [Ji, Wei; Yan, Xun-Wang; Lu, Zhong-Yi] Renmin Univ China, Dept Phys, Beijing 100872, Peoples R China; [Yan, Xun-Wang] Chinese Acad Sci, Inst Theoret Phys, Beijing 100190, Peoples R China
英文摘要: With the proposed Hund's rule correlation picture, i.e., the fluctuating Fe local moments with the As-bridged antiferromagnetic superexchange interactions, the exceptional collapsed tetragonal phase and related phase transitions observed in CaFe2As2 are well understood. Within the same framework, a pressure-temperature phase diagram is predicted for BaFe2As2 as well, in which a paramagnetic tetragonal structure and a collinear antiferromagnetic orthorhombic structure to nonmagnetic tetragonal structure transitions take place around 4-8 GPa and 10-15 GPa, respectively, and a nonmagnetic tetragonal to a nonmagnetic collapsed tetragonal structure transition takes place over 26 GPa. Our study helps to better understand the complex correlation among crystal structure, magnetism, and electronic structure in pnictides, a precondition to understanding the superconductivity in pnictides.
资助者: NSFC; FRFCU of MOE at RUC [10XNF085]; MOST [2011CBA00112]
收录类别: SCI
原文出处: 查看原文
语种: 英语
内容类型: 期刊论文
URI标识: http://ir.itp.ac.cn/handle/311006/14369
Appears in Collections:理论物理所2011年知识产出_期刊论文

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Recommended Citation:
Ji, W,Yan, XW,Lu, ZY. Pressure- and temperature-induced structural phase transitions of CaFe2As2 and BaFe2As2 studied in the Hund[J]. PHYSICAL REVIEW B,2011,83(13):132504.
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