Second Sound in Graphite: Thermal Transport Measurements at Room Temperature

2.2 MB of experimental data on second sound propagation in isotopically purified graphite at ambient conditions. The dataset, authored by Zhikun Xie and last updated in May 2026, contains measurements from transient thermal grating spectroscopy, showing a distinct damped oscillatory signal. This work demonstrates an enhancement of effective thermal conductivity by nearly 10% over the conventional diffusive limit.

Use Cases

• Modeling hydrodynamic phonon transport based on the reported damped oscillatory signals.
• Benchmarking thermal conductivity calculations against the experimental enhancement of nearly 10%.
• Analyzing the effect of isotopic purification on phonon-isotope scattering and heat transport regimes.
• Studying the transition between diffusive, ballistic, and wave-like heat transport in crystals.

Strengths

• Data is from a direct observation of second sound at room temperature, a rare phenomenon.
• Dataset size is 2.2 MB, making it manageable for quick analysis.
• Published under a permissive CC-BY-4.0 license, allowing for broad reuse.

Limitations

• Row count and specific column definitions are unknown, requiring manual inspection after download.
• Description metadata is limited; actual data quality requires manual inspection after download.

Provenance

Source

figshare

Collection Method

Data likely gathered via transient thermal grating spectroscopy, as described.

Freshness

Last updated 2026-05-29 07:03:30; freshness should be verified