Properties and Detection of Spin Nematic Order in Strongly Correlated Electron Systems

Details Properties and Detection of Spin Nematic Order in Strongly Correlated Electron Systems Properties and Detection of Spin Nematic Order in Strongly Correlated Electron Systems

2004-11-05

arxiv.org/abs/cond-mat/0411159v2

New J. Phys. 7, 59 (2005)

Physics

Condensed Matter

Strongly Correlated Electrons

13 pages, 11 figures. (v2) References added

Scientific paper

10.1088/1367-2630/7/1/059

A spin nematic is a state which breaks spin SU(2) symmetry while preserving translational and time reversal symmetries. Spin nematic order can arise naturally from charge fluctuations of a spin stripe state. Focusing on the possible existence of such a state in strongly correlated electron systems, we build a nematic wave function starting from a t-J type model. The nematic is a spin-two operator, and therefore does not couple directly to neutrons. However, we show that neutron scattering and Knight shift experiments can detect the spin anisotropy of electrons moving in a nematic background. We find the mean field phase diagram for the nematic taking into account spin-orbit effects.

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