Measurement of Unique Magnetic and Superconducting Phases in Oxygen-Doped High-Temperature Superconductors La2-xSrxCuO4+y

被引：16

作者：

Udby, L. ^{[1
]}

Larsen, J. ^{[2
]}

Christensen, N. B. ^{[2
]}

Boehm, M. ^{[3
]}

Niedermayer, Ch. ^{[4
]}

Mohottala, H. E. ^{[5
]}

Jensen, T. B. S. ^{[2
]}

Toft-Petersen, R. ^{[2
,6
]}

Chou, F. C. ^{[7
]}

Andersen, N. H. ^{[2
]}

Lefmann, K. ^{[1
]}

Wells, B. O. ^{[8
]}

机构：

[1] Univ Copenhagen, Niels Bohr Inst, Nanosci Ctr, DK-2100 Copenhagen, Denmark

[2] Tech Univ Denmark, Dept Phys, DK-2800 Lyngby, Denmark

[3] Inst Max Von Laue Paul Langevin, F-38042 Grenoble 9, France

[4] Paul Scherrer Inst, Neutron Scattering Lab, CH-5232 Villigen, Switzerland

[5] Univ Hartford, Hartford, CT 06117 USA

[6] Helmholtz Zentrum Berlin Mat & Energie, D-14109 Berlin, Germany

[7] Natl Taiwan Univ, Ctr Condensed Matter Sci, Taipei 10617, Taiwan

[8] Univ Connecticut, Dept Phys, Storrs, CT 06269 USA

来源：

PHYSICAL REVIEW LETTERS | 2013年 / 111卷 / 22期

关键词：

MUON-SPIN RELAXATION; NEUTRON-SCATTERING; PENETRATION DEPTH; LA2CUO4+DELTA; ORDER; ANTIFERROMAGNETISM; LA2-XSR(X)CUO4; TRANSITION; DEPENDENCE; DENSITY;

D O I：

10.1103/PhysRevLett.111.227001

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We present a combined magnetic neutron scattering and muon spin rotation study of the nature of the magnetic and superconducting phases in electronically phase separated La2-xSrxCuO4+y, x = 0.04, 0.065, 0.09. For all samples, we find long- range modulated magnetic order below TN similar or equal to Tc = 39 K. In sharp contrast to oxygen- stoichiometric La-2 -xSrxCuO4, we find that the magnetic propagation vector as well as the ordered magnetic moment is independent of Sr content and consistent with that of the "striped" cuprates. Our study provides direct proof that superoxygenation in La2-xSrxCuO4+y allows the spin stripe ordered phase to emerge and phase separate from superconducting regions with the hallmarks of optimally doped oxygen- stoichiometric La2-xSrxCuO4.

引用

页数：5

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