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

doi:10.1103/PhysRevLett.133.036001

Anomalous Superfluid Density in a Disordered Charge-Density-Wave Material: Pd-Intercalated ErTe_{3}

Phys Rev Lett. 2024 Jul 19;133(3):036001. doi: 10.1103/PhysRevLett.133.036001.

Authors

Yusuke Iguchi^{1

2

3}, Joshua A Straquadine^{2

3}, Chaitanya Murthy⁴, Steven A Kivelson^{1

2

4}, Anisha G Singh^{2

3}, Ian R Fisher^{1

2

3}, Kathryn A Moler^{1

2

3

4}

Affiliations

¹ Stanford Institute for Materials and Energy Sciences, <a href="https://ror.org/05gzmn429">SLAC National Accelerator Laboratory</a>, 2575 Sand Hill Road, Menlo Park, California 94025, USA.
² Geballe Laboratory for Advanced Materials, <a href="https://ror.org/00f54p054">Stanford University</a>, Stanford, California 94305, USA.
³ Department of Applied Physics, <a href="https://ror.org/00f54p054">Stanford University</a>, Stanford, California 94305, USA.
⁴ Department of Physics, <a href="https://ror.org/00f54p054">Stanford University</a>, Stanford, California 94305, USA.

PMID: 39094125
DOI: 10.1103/PhysRevLett.133.036001

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 on micron scales. We observe a rapid increase of the superfluid density below T_{c}, deviating from the behavior expected in a conventional Bardeen-Cooper-Schrieffer superconductor, and show that the temperature dependence is qualitatively consistent with a combination of quantum and thermal phase fluctuations.