Imaging Spatial Ordering of the Oxygen Chains in YBa2Cu3O6+y at the Insulator-to-Metal Transition

被引：11

作者：

Campi, G. ^{[1
]}

Ricci, A. ^{[2
]}

Poccia, N. ^{[3
,4
]}

Bianconi, A. ^{[1
,5
]}

机构：

[1] CNR, Inst Crystallog, I-00015 Rome, Italy

[2] Deutsch Elektronen Synchrotron DESY, D-22607 Hamburg, Germany

[3] Univ Twente, MESA, NL-7500 AE Enschede, Netherlands

[4] Univ Twente, Inst Nanotechnol, NL-7500 AE Enschede, Netherlands

[5] RICMASS Rome Int Ctr Mat Sci Superstripes, I-00185 Rome, Italy

来源：

JOURNAL OF SUPERCONDUCTIVITY AND NOVEL MAGNETISM | 2014年 / 27卷 / 04期

关键词：

X-Ray micro-diffraction; Granular matter; High temperature superconductors; PHASE-SEPARATION; SUPERCONDUCTIVITY; YBA2CU3O7-DELTA; SUPERSTRIPES; LA2CUO4+Y; PHONONS; LATTICE; MGB2;

D O I：

10.1007/s10948-013-2434-7

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

It is known that the mobile oxygen ions, y, in the basal plane of YBa2Cu3O6+y (0.33 < y < 0.67) form oxygen chains needed to create the metallic phase in the CuO2 layers. Here we visualize the spatial organization of oxygen chains in a crystal of YBa2Cu3O6+y very close to the insulator-to-superconductor transition with y=0.33 (T (c) =7 K). The distribution of oxygen defects chains has been obtained by performing scanning micro X-ray diffraction measurements. This experiment provides mixed real and reciprocal space information. We found a granular spatial pattern due to the oxygen chains being segregated in nanoscale puddles with ortho-II crystallographic structure embedded in an insulating matrix of disordered oxygen ions.

引用

页码：987 / 990

页数：4

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