Inhomogeneous ordering in weakly coupled Heisenberg S=1/2 chains with random bonds

被引：4

作者：

Thede, M. ^{[1
,2
]}

Haku, T. ^{[3
]}

Masuda, T.

Baines, C. ^{[2
]}

Pomjakushina, E. ^{[4
]}

Dhalenne, G. ^{[5
]}

Revcolevschi, A. ^{[5
]}

Morenzoni, E. ^{[2
]}

Zheludev, A. ^{[1
]}

机构：

[1] ETH, Solid State Phys Lab, CH-8093 Zurich, Switzerland

[2] Paul Scherrer Inst, Lab Muon Spin Spect, CH-5232 Villigen, Switzerland

[3] Univ Tokyo, Inst Solid State Phys, Neutron Scattering Lab, Tokai, Ibaraki 3191106, Japan

[4] Paul Scherrer Inst, Lab Dev & Methods, CH-5232 Villigen, Switzerland

[5] Univ Paris 11, F-91405 Orsay, France

来源：

PHYSICAL REVIEW B | 2014年 / 90卷 / 14期

基金：

日本学术振兴会;

关键词：

ANTI-FERROMAGNETIC CHAIN; QUANTUM SPIN CHAINS; ANTIFERROMAGNETIC CHAIN;

D O I：

10.1103/PhysRevB.90.144407

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Long-range magnetic ordering in the quasi-one-dimensional random-bond antiferromagnet BaCu2(Si1-xGex)(2)O-7 is studied in muon spin rotation experiments as a function of disorder strength. Compared to the disorder-free parent materials, the saturation-ordered moment is found to be considerably reduced. Moreover, even in weakly disordered species, the magnetically ordered state is shown to be highly inhomogeneous. The results are interpreted in terms of weakly coupled random spin chains, governed by the "infinite randomness" fixed point.

引用

页数：8

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