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Related Experiment Video

Updated: Jun 29, 2026

Experimental Investigation of Secondary Flow Structures Downstream of a Model Type IV Stent Failure in a 180° Curved Artery Test Section

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Published on: July 19, 2016

Phase-coherence effects in vortex transport entropy.

G Bridoux¹, G Nieva, F de la Cruz

¹Centro Atómico Bariloche and Instituto Balseiro, Comisión Nacional de Energía Atómica, Avenida E. Bustillo 9500, R84002AGP S. C. de Bariloche, Argentina. bridoux@cabbat1.cnea.gov.ar

Physical Review Letters

|October 15, 2008

Summary

This summary is machine-generated.

Superconducting materials exhibit unique liquid vortex matter thermodynamics. Structural defects influence vortex behavior differently in YBa2Cu3O7-delta and Bi2Sr2CaCu2O8+delta, impacting transport entropy and vortex mobility.

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Last Updated: Jun 29, 2026

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Published on: July 19, 2016

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Area of Science:

Condensed Matter Physics
Materials Science
Superconductivity

Background:

Investigating the thermodynamic properties of vortex matter in high-temperature superconductors is crucial for understanding their behavior.
Columnar defects are known to influence vortex dynamics and phase transitions in superconductors.

Purpose of the Study:

To elucidate the distinct thermodynamics of liquid vortex matter in Yttrium Barium Copper Oxide (YBa2Cu3O7-delta) and Bismuth Strontium Calcium Copper Oxide (Bi2Sr2CaCu2O8+delta) superconductors.
To determine the role of structural defects on vortex behavior and transport properties in these materials.

Main Methods:

Nernst effect measurements
Electrical resistivity measurements
Comparative analysis of superconducting materials with and without columnar defects

Main Results:

The Nernst signal in a high-temperature region of the H-T phase diagram is independent of structural defects in both YBa2Cu3O7-delta and Bi2Sr2CaCu2O8+delta.
In YBa2Cu3O7-delta, defects at lower temperatures affect vortex mobility, consistent with a system of vortex lines.
In Bi2Sr2CaCu2O8+delta, the Nernst signal maximum at lower temperatures is linked to pancake vortex entropy in the presence of defects, not transport properties.

Conclusions:

The thermodynamics of liquid vortex matter show distinct behaviors in YBa2Cu3O7-delta and Bi2Sr2CaCu2O8+delta.
Structural defects play a material-dependent role in modulating vortex dynamics and thermodynamic properties in these superconductors.
The findings highlight the complex interplay between defects, vortex matter, and emergent phenomena in high-Tc superconductors.