Frustration driven lattice distortion; an NMR investigation of Y2Mo2O7

Details Frustration driven lattice distortion; an NMR investigation of Y2Mo2O7 Frustration driven lattice distortion; an NMR investigation of Y2Mo2O7

2001-09-13

arxiv.org/abs/cond-mat/0109238v1

Physics

Condensed Matter

Strongly Correlated Electrons

To be published in Phys. Rev. Lett

Scientific paper

10.1103/PhysRevLett.87.177201

We have investigated the 89Y NMR spectrum and spin lattice relaxation, T1, in the magnetically frustrated pyrochlore Y2Mo2O7. We find that upon cooling the spectrum shifts, and broadens asymmetrically. A detailed examination of the low T spectrum reveals that it is constructed from multiple peaks, each shifted by a different amount. We argue that this spectrum is due to discrete lattice distortions, and speculate that these distortions relieve the frustration and reduce the system's energy.

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