Dominant in-plane symmetric elastoresistance in CsFe2As2

P. Wiecki; A. -A. Haghighirad; F. Weber; M. Merz; R. Heid; A. E. Böhmer

doi:10.1103/PhysRevLett.125.187001

Dominant in-plane symmetric elastoresistance in CsFe2As2

Strongly Correlated Electrons 2020-11-04 v1 Superconductivity

Authors: P. Wiecki , A. -A. Haghighirad , F. Weber , M. Merz , R. Heid , A. E. Böhmer

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Abstract

We study the elastoresistance of the highly correlated material CsFe2As2 in all symmetry channels. Neutralizing its thermal expansion by means of a piezoelectric-based strain cell is demonstrated to be essential. The elastoresistance response in the in-plane symmetric channel is found to be large, while the response in the symmetry-breaking channels is weaker and provides no evidence for a divergent nematic susceptibility. Rather, our results can be interpreted naturally within the framework of a coherence-incoherence crossover, where the low-temperature coherent state is sensitively tuned by the in-plane atomic distances.

Cite

@article{arxiv.2005.13838,
  title  = {Dominant in-plane symmetric elastoresistance in CsFe2As2},
  author = {P. Wiecki and A. -A. Haghighirad and F. Weber and M. Merz and R. Heid and A. E. Böhmer},
  journal= {arXiv preprint arXiv:2005.13838},
  year   = {2020}
}

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