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Near-field radiative heat transfer between high-temperature superconductors.
S G Castillo-López1, G Pirruccio1, C Villarreal1
1Instituto de Física, Universidad Nacional Autónoma de México, Apartado Postal 20-364, Mexico, 01000, Mexico.
Scientific Reports
|October 1, 2020
Summary
Near-field radiative heat transfer (NFRHT) is significantly suppressed when using high-temperature superconductors like YBCO. This finding offers new pathways for thermal management in superconducting devices.
Area of Science:
- Condensed Matter Physics
- Thermodynamics
- Materials Science
Background:
- Near-field radiative heat transfer (NFRHT) is crucial for thermal management in nanoscale devices.
- High-temperature superconductors offer unique electromagnetic properties that can potentially modify heat transfer.
Purpose of the Study:
- To theoretically investigate NFRHT between Yttrium Barium Copper Oxide (YBCO) slabs.
- To analyze the impact of the superconducting state on NFRHT under various conditions.
Main Methods:
- Utilizing Rytov's theory of fluctuating electrodynamics to calculate radiative heat transfer.
- Employing a two-fluid model to describe the dielectric function of YBCO.
Main Results:
- Demonstrated significant suppression of NFRHT when one or both YBCO slabs are in the superconducting state.
- Attributed the suppression to charge carrier density balance and reduced electron scattering.
- Identified large damping of mid-infrared carriers as a key factor screening surface plasmon excitation.
Conclusions:
- Superconducting YBCO effectively suppresses NFRHT, offering potential for thermal control.
- The observed phenomena are linked to fundamental changes in electron dynamics within the superconductor.
- This study highlights the role of superconducting properties in tailoring radiative heat transfer.
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