Ultrafast dynamics in the Lifshitz-type 5${d}$ pyrochlore antiferromagnet Cd$_{2}$Os$_{2}$O$_{7}$

Inho Kwak; Min-Cheol Lee; Byung Cheol Park; Choong H. Kim; Bumjoo Lee; C. W. Seo; J. Yamaura; Z. Hiroi; Tae Won Noh; K. W. Kim

doi:10.1103/PhysRevB.100.144309

Ultrafast dynamics in the Lifshitz-type 5${d}$ pyrochlore antiferromagnet Cd$_{2}$Os$_{2}$O$_{7}$

Strongly Correlated Electrons 2019-12-02 v1

Authors: Inho Kwak , Min-Cheol Lee , Byung Cheol Park , Choong H. Kim , Bumjoo Lee , C. W. Seo , J. Yamaura , Z. Hiroi , Tae Won Noh , K. W. Kim

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Abstract

We investigate the ultrafast dynamics of Cd $_2$ Os $_2$ O $_7$ , a prototype material showing a Lifshitz-type transition as a function of temperature. In the paramagnetic metallic state, the photo-reflectivity shows a sub-picosecond relaxation, followed by a featureless small offset. In the antiferromagnetic state slightly below $T_N$ , however, the photo-reflectivity resurges over hundreds of picoseconds, which goes beyond the usual realm of the effective-temperature model. Our observations are consistent with the Lifshitz phase transition of Cd $_2$ Os $_2$ O $_7$ driven by the evolution of the local magnetic moment.

Keywords

ultrafast dynamics lifshitz transition pyrochlore antiferromagnet cd2os2o7 photo-reflectivity

Cite

@article{arxiv.1911.12921,
  title  = {Ultrafast dynamics in the Lifshitz-type 5${d}$ pyrochlore antiferromagnet Cd$_{2}$Os$_{2}$O$_{7}$},
  author = {Inho Kwak and Min-Cheol Lee and Byung Cheol Park and Choong H. Kim and Bumjoo Lee and C. W. Seo and J. Yamaura and Z. Hiroi and Tae Won Noh and K. W. Kim},
  journal= {arXiv preprint arXiv:1911.12921},
  year   = {2019}
}

Ultrafast dynamics in the Lifshitz-type 5${d}$ pyrochlore antiferromagnet Cd$_{2}$Os$_{2}$O$_{7}$

Abstract

Keywords

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