Rods of Neutron Scattering Intensity in Yb2Ti2O7: Compelling Evidence for Significant Anisotropic Exchange in a Magnetic Pyrochlore Oxide

被引：94

作者：

Thompson, Jordan D. ^{[1
]}

McClarty, Paul A. ^{[1
]}

Ronnow, Henrik M. ^{[2
]}

Regnault, Louis P. ^{[3
]}

Sorge, Andreas ^{[4
,5
]}

Gingras, Michel J. P. ^{[1
,5
,6
]}

机构：

[1] Univ Waterloo, Dept Phys & Astron, Waterloo, ON N2L 3G1, Canada

[2] Ecole Polytechn Federale Lausanne EPFL, Lab Quantum Magnetism, CH-1015 Lausanne, Switzerland

[3] CEA, INAC, SPSMS, MDN, F-38054 Grenoble 9, France

[4] MPI Dynam & Self Org, Network Dynam Grp, D-37073 Gottingen, Germany

[5] Univ Canterbury, Dept Phys & Astron, Christchurch, New Zealand

[6] Canadian Inst Adv Res, Toronto, ON M5G L63, Canada

来源：

PHYSICAL REVIEW LETTERS | 2011年 / 106卷 / 18期

基金：

加拿大自然科学与工程研究理事会;

关键词：

ANTIFERROMAGNET; TRANSITION; STATE;

D O I：

10.1103/PhysRevLett.106.187202

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Paramagnetic correlations in the magnetic material Yb2Ti2O7 have been investigated via neutron scattering, revealing a [111] rod of scattering intensity. Assuming interactions between the Yb3+ ions composed of all symmetry-allowed nearest neighbor exchange interactions and long-range dipolar interactions, we construct a model Hamiltonian that allows for an excellent description of the neutron scattering data. Our results provide compelling evidence for significant anisotropic exchange interactions in an insulating magnetic pyrochlore oxide. We also compute the real space correlations leading to the [111] rod of scattering.

引用

页数：4

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