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Anomalous vortex liquid in charge-ordered cuprate superconductors.

Yu-Te Hsu1,2, Maarten Berben3,2, Matija Čulo3,2

  • 1High Field Magnet Laboratory, Radboud University, 6525ED Nijmegen, The Netherlands; yute.hsu@ru.nl.

Proceedings of the National Academy of Sciences of the United States of America
|February 13, 2021
PubMed
Summary
This summary is machine-generated.

Charge order in cuprates creates an anomalous vortex liquid, impacting superconductivity. This fragile state, characterized by nonohmic resistivity, is observed in high magnetic fields.

Keywords:
charge transporthigh-Tc superconductivityvortex matter

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Area of Science:

  • Condensed Matter Physics
  • Materials Science
  • Superconductivity Research

Background:

  • The relationship between charge order and d-wave superconductivity in high-temperature cuprates is not fully understood.
  • Charge order is known to compete with superconductivity, but its effect on charge transport in the mixed state (vortex presence) is unclear.

Purpose of the Study:

  • To investigate the impact of charge order on electrical resistivity in the mixed state of cuprates under intense magnetic fields.
  • To determine the relationship between charge order and the behavior of vortices in high-magnetic-field conditions.

Main Methods:

  • Studied low-temperature electrical resistivity of three different cuprate families.
  • Applied intense magnetic fields, varied hole doping levels, and used different current excitations.
  • Analyzed resistivity behavior to identify features of anomalous vortex liquids.

Main Results:

  • Observed nonohmic resistivity in the doping regime with long-range charge order, indicating an anomalous vortex liquid.
  • The occurrence of nonohmic behavior correlates with the presence of charge order near the vortex solid boundary.
  • Identified this anomalous vortex liquid as a common feature in the high-field state of charge-ordered cuprates.

Conclusions:

  • Long-range charge order is closely linked to the emergence of an anomalous vortex liquid in cuprates.
  • This anomalous vortex liquid signifies fragile superconductivity with a reduced critical current density.
  • The findings suggest this phenomenon is ubiquitous in charge-ordered cuprates under high magnetic fields.