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arXiv · 2005.13838

Dominant in-plane symmetric elastoresistance in CsFe2As2

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.

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P. Wiecki, A. -A. Haghighirad, F. Weber, M. Merz, R. Heid, A. E. Böhmer. 2020-05-28. Dominant in-plane symmetric elastoresistance in CsFe2As2. https://doi.org/10.1103/physrevlett.125.187001

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