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arXiv · 2312.15155

Anomalous superfluid density in a disordered charge density wave material: Pd-intercalated ErTe$_3$

Yusuke Iguchi·Joshua A. Straquadine·Chaitanya Murthy·Steven A. Kivelson·Anisha G. Singh·Ian R. Fisher·Kathryn A. Moler
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Abstract

We image local superfluid density in single crystals of Pd-intercalated ErTe$_3$ below the superconducting critical temperature, $T_c$, well below the onset temperature, $T_{CDW}$, of (disordered) charge-density-wave order. We find no detectable inhomogeneities. We observe a rapid increase of the superfluid density below $T_c$, deviating from the behavior expected in conventional Bardeen-Cooper-Schrieffer, and show that the temperature dependence is qualitatively consistent with a combination of quantum and thermal phase fluctuations.

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Yusuke Iguchi, Joshua A. Straquadine, Chaitanya Murthy, Steven A. Kivelson, Anisha G. Singh, Ian R. Fisher, Kathryn A. Moler. 2023-12-23. Anomalous superfluid density in a disordered charge density wave material: Pd-intercalated ErTe$_3$. https://doi.org/10.1103/physrevlett.133.036001

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