Opposite pressure effects in the orbitally-induced Peierls phase transition systems CuIr2S4 and MgTi2O4

doi:10.1039/c7dt00527j

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	Opposite pressure effects in the orbitally-induced Peierls phase transition systems CuIr2S4 and MgTi2O4
	Ma, Long 1; Han, Hui 1,2; Liu, Wei 1,2; Yang, Kaishuai 3; Zhu, Yuanyuan 4; Zhang, Changjin1 ; Pi, Li1,5 ; Liu, Dayong3 ; Zhang, Lei1 ; Zhang, Yuheng1,5
	2017-05-28
发表期刊	DALTON TRANSACTIONS
摘要	The iso-spinel structural systems CuIr2S4 and MgTi2O4 exhibit phase transitions of a similar nature at similar to 230 K and similar to 260 K respectively, which are explained as an orbitally-induced Peierls phase transition. However, in this work, we uncover that the applied pressure has opposite pressure effects on the phase transitions in CuIr2S4 and MgTi2O4. As the pressure increases, the phase transition temperature (T-MI) for CuIr2S4 increases while that for MgTi2O4 decreases. In addition, the phase transition intensity becomes weaker for CuIr2S4 but gets stronger for MgTi2O4 under pressure. Our results indicate that the applied pressure suppresses the metallic phase in CuIr2S4, while enhances that in MgTi2O4. Combining the experimental observations with first-principles electronic structure calculations, we suggest that the opposite pressure effects in CuIr2S4 and MgTi2O4 originate from the different orbital ordering configurations (d(xy), d(yz)/d(xz)) caused by different lattice distortions in these two systems. Our findings indicate directly that the interplay between the orbital and lattice degrees of freedom plays an important role in the orbitally-induced Peierls phase transition.
文章类型	Article
WOS标题词	Science & Technology ; Physical Sciences
DOI	10.1039/c7dt00527j
关键词[WOS]	METAL-INSULATOR-TRANSITION ; THIOSPINEL CUIR2S4 ; SPINEL ; RESONANCE
收录类别	SCI
语种	英语
项目资助者	National Natural Science Foundation of China(11574322 ; National Natural Science Foundation of China(11574322 ; National Natural Science Foundation of China(11574322 ; National Natural Science Foundation of China(11574322 ; National Natural Science Foundation of China(11574322 ; National Natural Science Foundation of China(11574322 ; National Natural Science Foundation of China(11574322 ; National Natural Science Foundation of China(11574322 ; State Key Project of Fundamental Research of China(2011CBA00111) ; State Key Project of Fundamental Research of China(2011CBA00111) ; State Key Project of Fundamental Research of China(2011CBA00111) ; State Key Project of Fundamental Research of China(2011CBA00111) ; State Key Project of Fundamental Research of China(2011CBA00111) ; State Key Project of Fundamental Research of China(2011CBA00111) ; State Key Project of Fundamental Research of China(2011CBA00111) ; State Key Project of Fundamental Research of China(2011CBA00111) ; Foundation for Users with Potential of Hefei Science Center (CAS)(2015HSC-UP001) ; Foundation for Users with Potential of Hefei Science Center (CAS)(2015HSC-UP001) ; Foundation for Users with Potential of Hefei Science Center (CAS)(2015HSC-UP001) ; Foundation for Users with Potential of Hefei Science Center (CAS)(2015HSC-UP001) ; Foundation for Users with Potential of Hefei Science Center (CAS)(2015HSC-UP001) ; Foundation for Users with Potential of Hefei Science Center (CAS)(2015HSC-UP001) ; Foundation for Users with Potential of Hefei Science Center (CAS)(2015HSC-UP001) ; Foundation for Users with Potential of Hefei Science Center (CAS)(2015HSC-UP001) ; U1332140 ; U1332140 ; U1332140 ; U1332140 ; U1332140 ; U1332140 ; U1332140 ; U1332140 ; 11574315 ; 11574315 ; 11574315 ; 11574315 ; 11574315 ; 11574315 ; 11574315 ; 11574315 ; 11504377 ; 11504377 ; 11504377 ; 11504377 ; 11504377 ; 11504377 ; 11504377 ; 11504377 ; 11574288) ; 11574288) ; 11574288) ; 11574288) ; 11574288) ; 11574288) ; 11574288) ; 11574288)
WOS研究方向	Chemistry
WOS类目	Chemistry, Inorganic & Nuclear
WOS记录号	WOS:000401936700025
引用统计	被引频次：4[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.hfcas.ac.cn:8080/handle/334002/31946
专题	中科院强磁场科学中心
作者单位	1.Chinese Acad Sci, High Field Magnet Lab, Anhui Key Lab Condensed Matter Phys Extreme Condi, Hefei 230031, Peoples R China 2.Univ Sci & Technol China, Hefei 230026, Peoples R China 3.Chinese Acad Sci, Inst Solid State Phys, Key Lab Mat Phys, Hefei 230031, Peoples R China 4.Shanxi Univ Sci & Technol, Sch Arts & Sci, Xian 710021, Peoples R China 5.Univ Sci & Technol China, Hefei Natl Lab Phys Sci Microscale, Hefei 230026, Peoples R China
第一作者单位	中科院强磁场科学中心
推荐引用方式 GB/T 7714	Ma, Long,Han, Hui,Liu, Wei,et al. Opposite pressure effects in the orbitally-induced Peierls phase transition systems CuIr2S4 and MgTi2O4[J]. DALTON TRANSACTIONS,2017,46(20):6708-6714.
APA	Ma, Long.,Han, Hui.,Liu, Wei.,Yang, Kaishuai.,Zhu, Yuanyuan.,...&Zhang, Yuheng.(2017).Opposite pressure effects in the orbitally-induced Peierls phase transition systems CuIr2S4 and MgTi2O4.DALTON TRANSACTIONS,46(20),6708-6714.
MLA	Ma, Long,et al."Opposite pressure effects in the orbitally-induced Peierls phase transition systems CuIr2S4 and MgTi2O4".DALTON TRANSACTIONS 46.20(2017):6708-6714.

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