Charge ordering in La1.8-xEu0.2SrxCuO4 studied by resonant soft x-ray diffraction

被引：104

作者：

Fink, Joerg ^{[1
,2
]}

Schierle, Enrico ^{[1
]}

Weschke, Eugen ^{[1
]}

Geck, Jochen ^{[2
,3
]}

Hawthorn, David ^{[3
]}

Soltwisch, Viktor ^{[1
]}

Wadati, Hiroki ^{[3
]}

Wu, Hsueh-Hung ^{[4
,5
]}

Duerr, Hermann A. ^{[1
]}

Wizent, Nadja ^{[2
]}

Buechner, Bernd ^{[2
]}

Sawatzky, George A. ^{[3
]}

机构：

[1] Helmholtz Zentrum Berlin Mat & Energie, D-12489 Berlin, Germany

[2] Leibniz Inst Solid State & Mat Res Dresden, D-01171 Dresden, Germany

[3] Univ British Coulombia, Dept Phys & Astron, Vancouver, BC V6T 1Z1, Canada

[4] Univ Cologne, Inst Phys 2, D-50937 Cologne, Germany

[5] Natl Synchrotron Radiat Res Ctr, Hsinchu 30076, Taiwan

来源：

PHYSICAL REVIEW B | 2009年 / 79卷 / 10期

关键词：

charge-ordered states; doping; europium compounds; high-temperature superconductors; hole density; lanthanum compounds; strontium compounds; superconducting transition temperature; X-ray diffraction; X-ray scattering; STRIPE PHASES; DOPED HOLES; LA2-XSRXCUO4; SUPERCONDUCTORS; LA1.48ND0.4SR0.12CUO4; FLUCTUATIONS; TEMPERATURE; CUPRATE; STATES; SPINS;

D O I：

10.1103/PhysRevB.79.100502

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Resonant soft x-ray scattering with photon energies near the O K and the Cu L-3 edges was used to study the charge ordering in the system La1.8-xEu0.2SrxCuO4 as a function of temperature for x=0.125 and 0.15. From the superstructure diffraction intensities, a charge ordering with a doping-dependent wave vector is derived which is in this system well below the transition temperature of the low-temperature tetragonal phase but well above the onset of spin ordering. This indicates that structural changes and magnetic interactions are not in general the driving force for the formation of stripelike phases in two-dimensional-doped cuprates. Analysis of the lineshape of the scattered intensity as a function of photon energy yields evidence for a high hole concentration in the stripes.

引用

页数：4

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