Quantum Strings in Quantum Spin Ice

被引：40
|
作者：
Wan, Yuan [1 ]
Tchernyshyov, Oleg [1 ]
机构：
[1] Johns Hopkins Univ, Dept Phys & Astron, Baltimore, MD 21218 USA
来源：
PHYSICAL REVIEW LETTERS | 2012年 / 108卷 / 24期
关键词：
MAGNETIC MONOPOLES;
D O I：
10.1103/PhysRevLett.108.247210
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
We study quantum spin ice in an external magnetic field applied along a < 100 > direction. When quantum spin fluctuations are weak, elementary excitations are quantum strings with monopoles at their ends manifested as multiple spin wave branches in the dynamical structure factor. Strong quantum fluctuations make the string tension negative and give rise to the deconfinement of monopoles. We discuss our results in the light of recent neutron scattering experiments in Yb2Ti2O7.
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页数：4
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