Local Noncentrosymmetric Structure of Bi2Sr2CaCu2O8+y by X-ray Magnetic Circular Dichroism at Cu K-Edge XANES

doi:10.1007/s10948-017-4418-5

	Local Noncentrosymmetric Structure of Bi2Sr2CaCu2O8+y by X-ray Magnetic Circular Dichroism at Cu K-Edge XANES
	Marcelli, A; Wilhelm, F; Bianconi, A; Menushenkov, AP; Ivanov, VG; Ivanov, AA; Xu W(徐伟); Rogalev, A; Puri, A; Joseph, B
刊名	JOURNAL OF SUPERCONDUCTIVITY AND NOVEL MAGNETISM
	2018
卷号	31 期号:3 页码:663-670
关键词	Bi2Sr2CaCu2O8+y (Bi2212) X-ray absorption near edge structure (XANES) X-ray magnetic circular dichroism (XMCD) Cu K-edge Noncentrosymmetric superconductivity
ISSN号	1557-1939
DOI	10.1007/s10948-017-4418-5
文献子类	Article; Proceedings Paper
英文摘要	The two-dimensional Bi2Sr2CaCu2O8+y (Bi2212), the most studied prototype cuprate superconductor, is a lamellar system made of a stack of two-dimensional corrugated CuO2 bilayers separated by Bi2O2 + y Sr-2 O-2 layers. While the large majority of theories, proposed to interpret unconventional high T (c) superconductivity in Bi2Sr2CaCu2O8+y , assume a centrosymmetric tetragonal CuO2 lattice for the [CuO2]Ca[CuO2] bilayer, here, we report new compelling results providing evidence for local noncentrosymmetric symmetry at the Cu atom. We have measured polarized Cu K-edge XANES (X-ray absorption near-edge structure) and the K-edge X-ray magnetic circular dichroism (XMCD) of a Bi2212 single-crystal near-optimum doping. The Cu K-edge XMCD signal was measured at ID12 beamline of ESRF with the k-vector of X-ray beam parallel to c-axis, i.e., with the electric field of X-ray beam E//ab, using a 17-T magnetic field parallel to the c-axis of a Bi2212 single crystal. Numerical simulations of the XMCD signal of Bi2212 by multiple scattering theory have shown agreement with the experimental XMCD signal only for the local structure with noncentrosymmetric Bb2b space group of Bi2Sr2CaCu2O8+y .
电子版国际标准刊号	1557-1947
会议地点	ITALY
WOS关键词	HIGH-T-C ; CHARGE-DENSITY-WAVE ; INCOMMENSURATE MODULATION ; NEUTRON-DIFFRACTION ; PEROVSKITE SUPERCONDUCTORS ; O SUPERCONDUCTOR ; STRIPE STRUCTURE ; SINGLE-CRYSTAL ; CRITICAL-POINT ; ABSORPTION
WOS研究方向	Physics
语种	英语
WOS记录号	WOS:000424701400010
内容类型	期刊论文
源URL	[http://ir.ihep.ac.cn/handle/311005/285670]
专题	高能物理研究所_多学科研究中心
作者单位	中国科学院高能物理研究所
推荐引用方式 GB/T 7714	Marcelli, A,Wilhelm, F,Bianconi, A,et al. Local Noncentrosymmetric Structure of Bi2Sr2CaCu2O8+y by X-ray Magnetic Circular Dichroism at Cu K-Edge XANES[J]. JOURNAL OF SUPERCONDUCTIVITY AND NOVEL MAGNETISM,2018,31(3):663-670.
APA	Marcelli, A.,Wilhelm, F.,Bianconi, A.,Menushenkov, AP.,Ivanov, VG.,...&Xu, W.(2018).Local Noncentrosymmetric Structure of Bi2Sr2CaCu2O8+y by X-ray Magnetic Circular Dichroism at Cu K-Edge XANES.JOURNAL OF SUPERCONDUCTIVITY AND NOVEL MAGNETISM,31(3),663-670.
MLA	Marcelli, A,et al."Local Noncentrosymmetric Structure of Bi2Sr2CaCu2O8+y by X-ray Magnetic Circular Dichroism at Cu K-Edge XANES".JOURNAL OF SUPERCONDUCTIVITY AND NOVEL MAGNETISM 31.3(2018):663-670.