Robust superconductivity intertwined with charge density wave and disorder in Pd-intercalated ErTe${}_3$

Abstract

Pd-intercalated ErTe${}_3$ is studied as a model system to explore the effect of "intertwined" superconducting and charge density wave (CDW) orders. Despite the common wisdom that superconductivity emerges only when CDW is suppressed, we present data from STM and AC susceptibility measurements that show no direct competition between CDW order and superconductivity. Both coexist over most of the intercalation range, with uniform superconductivity over length scales that exceed the superconducting coherence length. This is despite persisting short-range CDW order and increased scattering from the Pd intercalation. While superconductivity is insensitive to local defects in either of the bi-directional CDWs, vestiges of the Fermi-level distortions are observed in the properties of the superconducting state.

arXiv comment10 pages, 6 figures

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Cited by in corpus (8)

• Superconductivity and charge-density wave formation in lithium intercalated 2H-LixTaS2
• Bragg glass signatures in Pd${}_x$ErTe${}_3$ with X-ray diffraction Temperature Clustering (X-TEC)
• Anomalous thermal transport and violation of Wiedemann-Franz law in the critical regime of a charge density wave transition
• Melting of unidirectional charge density waves across twin domain boundaries in GdTe${}_3$
• Emergent properties and the multiscale characterization challenge in condensed matter, from crystals to complex materials: a Review
• Emergent ${\mathbb{Z}}_2$ symmetry near a CDW multicritical point
• Anomalous superfluid density in a disordered charge density wave material: Pd-intercalated ErTe${}_3$
• Impact of disorder in the charge-density-wave state of Pd-intercalated ErTe${}_3$ revealed by the electrodynamic response