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	Tem and eels studies of sr2cuo3+delta (nominal delta=0.1-0.4): effect of apical oxygen ordering on t-c of cuprate superconductors
	Yang, H.; Liu, Q. Q.; Li, F. Y.; Jin, C. Q.; Yu, R. C.
刊名	Physica c-superconductivity and its applications
	2007-12-01
卷号	467期号:1-2页码:59-66
关键词	High-t-c superconductor Apical oxygen Tem Modulation structure
ISSN号	0921-4534
DOI	10.1016/j.physc.2007.08.007
通讯作者	Yu, r. c.(rcyu@aphy.iphy.ac.cn)
英文摘要	In this paper, transmission electron microscopy (tem) and electron energy-loss spectroscopy (eels) techniques are utilized to study the as prepared superconducting samples of sr2cuo3+delta with different nominal 6 to reveal the origin of superconductivity. the 60, 68 and 75 k superconductivities observed in these samples are revealed to arise, respectively, from the pmmm (a = 5 root 2a(p), b = root 2a(p) and c = c(p)), cmmm (a = c(p), b = 3 root 2a(p) and c = 4 root 2a(p)) and c2/m (a = 5 root 2a(p), b = c(p), c = root 26 root 2/2a(p) and beta = 101.3 degrees) modulated phases. these superconducting modulated phases are suggested to be formed by the ordering of apical oxygen, and each of them is associated with a distinct type of the ordering. oxygen k absorption edge measured by eels indicates that these modulated phases have a similar hole doping level. our experimental results suggest that the superconductivity differences in the sr2cuo3+delta system are mainly caused by the reordering of apical oxygen. (c) 2007 elsevier b.v. all rights reserved.
WOS关键词	HIGH-PRESSURE SYNTHESIS ; INCOMMENSURATE MODULATED STRUCTURE ; TETRAGONAL SR2CUO3+X ; HEAT-TREATMENT ; COPPER OXIDES ; O SYSTEM ; SR2CUO2+DELTA-CL2-Y ; DISORDER ; NEUTRON ; SERIES
WOS研究方向	Physics
WOS类目	Physics, Applied
语种	英语
出版者	ELSEVIER SCIENCE BV
WOS记录号	WOS:000251886000010
内容类型	期刊论文
URI标识	http://www.corc.org.cn/handle/1471x/2373647
专题	物理研究所
通讯作者	Yu, R. C.
作者单位	Inst Phys, Beijing Natl Lab Condensed Matter Phys, Lab Extreme Condit Phys, Beijing 100080, Peoples R China
推荐引用方式 GB/T 7714	Yang, H.,Liu, Q. Q.,Li, F. Y.,et al. Tem and eels studies of sr2cuo3+delta (nominal delta=0.1-0.4): effect of apical oxygen ordering on t-c of cuprate superconductors[J]. Physica c-superconductivity and its applications,2007,467(1-2):59-66.
APA	Yang, H.,Liu, Q. Q.,Li, F. Y.,Jin, C. Q.,&Yu, R. C..(2007).Tem and eels studies of sr2cuo3+delta (nominal delta=0.1-0.4): effect of apical oxygen ordering on t-c of cuprate superconductors.Physica c-superconductivity and its applications,467(1-2),59-66.
MLA	Yang, H.,et al."Tem and eels studies of sr2cuo3+delta (nominal delta=0.1-0.4): effect of apical oxygen ordering on t-c of cuprate superconductors".Physica c-superconductivity and its applications 467.1-2(2007):59-66.

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