Intrinsic relation between ground-state fidelity and the characterization of a quantum phase transition

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	Intrinsic relation between ground-state fidelity and the characterization of a quantum phase transition
	Chen, S ; Wang, L ; Hao, YJ ; Wang, YP
刊名	PHYSICAL REVIEW A
	2008
卷号	77 期号:3
ISSN号	1050-2947
中文摘要	The electronic structure of the highly ordered alloy Cr3Co with the DO3 structure has been studied by FLAPW calculations. It is found that the ferrimagnetic state is stable and that the equilibrium lattice constant of Cr3Co equals 5.77 angstrom. A large peak in majority spin density of states (DOS) and an energy gap in minority spin DOS are observed at the Fermi level, which results in a high spin polarization of 90% in the ordered alloy Cr3Co. The total magnetic moment of Cr3Co is 3.12 mu(B), which is close to the ideal value of 3 mu(B) derived from the Slater-Pauling curve. An antiparallel alignment between the moments on the Cr (A, C) sites and the Cr (B) sites is observed. Finally, the effect of lattice distortion on the electronic structure and on magnetic properties of Cr3Co compound is studied. A spin polarization higher than 80% can be obtained between 5.55 and 5.90 angstrom. With increasing lattice constant, the magnetic moments on the (A, C) sites increase and the moments on the (B, D) sites decrease. They compensate each other and make the total magnetic moment change only slightly. (c) 2007 Elsevier B.V. All rights reserved.
收录类别	SCI
公开日期	2013-09-18
内容类型	期刊论文
源URL	[http://ir.iphy.ac.cn/handle/311004/40218]
专题	物理研究所_物理所公开发表论文_物理所公开发表论文_期刊论文
推荐引用方式 GB/T 7714	Chen, S,Wang, L,Hao, YJ,et al. Intrinsic relation between ground-state fidelity and the characterization of a quantum phase transition[J]. PHYSICAL REVIEW A,2008,77(3).
APA	Chen, S,Wang, L,Hao, YJ,&Wang, YP.(2008).Intrinsic relation between ground-state fidelity and the characterization of a quantum phase transition.PHYSICAL REVIEW A,77(3).
MLA	Chen, S,et al."Intrinsic relation between ground-state fidelity and the characterization of a quantum phase transition".PHYSICAL REVIEW A 77.3(2008).