Skip to content
6CCVD Research

Thermal conductivity of chemical vapor deposition diamond enriched with 13C isotope

At a Glance

Section titled “At a Glance”
MetadataDetails
Publication Date2025-03-26
JournalJournal of Applied Physics
AuthorsA. V. Inyushkin, Victor Ralchenko, A. P. Bolshakov, А.А. Khomich, D.A. Chernodoubov
InstitutionsNational Research Nuclear University MEPhI, Prokhorov General Physics Institute
Citations1

Abstract

Section titled “Abstract”

Thermal conductivity Îș(T) of single-crystal CVD diamond enriched with 13C isotope to 98.16% was measured by the method of steady-state longitudinal heat flow in the temperature range from 6 to 410 K. This crystal with low nitrogen impurity content (<50 ppb) showed thermal conductivity 2010±50 W m−1 K−1 at 300 K (with a maximum of 12 100 W m−1 K−1 at 83 K), which is significantly lower than that of diamond with natural isotopic composition: Îș(300K)=2360±50 W m−1 K−1. The measured data were analyzed using first-principles theory and the Callaway model, taking into account phonon scattering in three-phonon processes, scattering at sample boundaries and at isotopes. The first-principles calculations overestimate the thermal conductivity compared to the measured one near and to the right of the Îș(T) peak, indicating the presence of significant additional phonon scattering by lattice defects in the studied chemically pure diamond samples. The results of both theoretical approaches for thermal conductivity at 300 K are in good agreement with our measured data and other published experimental data for isotopically modified diamonds. First-principles calculations yield a thermal conductivity ratio of Îș12(T)/Îș13(T)=1.072 for monoisotopic defect-free 12C and 13C crystals at 300 K. This ratio decreases at high temperatures to a value of 1.041 according to the Leibfried-Schlömann theory and to a value of 0.921 at very low temperatures.

Tech Support

Section titled “Tech Support”

Original Source

Section titled “Original Source”

References

Section titled “References”
  1. 2019 - Embedded cooling for wide bandgap power amplifiers: A review [Crossref]
  2. 2020 - High-resolution thermoreflectance imaging investigation of self-heating in AlGaN/GaN HEMTs on Si, SiC, and diamond substrates [Crossref]
  3. 2016 - Single crystal diamond wafers for high power electronics [Crossref]
  4. 2021 - Diamond as the heat spreader for the thermal dissipation of GaN-based electronic devices [Crossref]
  5. 2017 - Diamond X-ray optics: Transparent, resilient, high-resolution, and wavefront preserving [Crossref]
  6. 2016 - Fabrication of polycrystalline diamond refractive X-ray lens by femtosecond laser processing [Crossref]
  7. 2021 - Diamond X-ray refractive optics [Crossref]
  8. 2019 - Diamond window technology for electron cyclotron heating and current drive: State of the art [Crossref]
  9. 2018 - High power diamond Raman lasers [Crossref]
  10. 2018 - Thermal conductivity of high purity synthetic single crystal diamonds [Crossref]

Reads Similar to This

Dynamics in a 1.2 kW quasi-continuous-wave diamond Raman laser with low-coherence pumping (Conference Presentation) A Capacitance Model for Front- and Back-Gate Threshold Voltage Computation of Ultra-Thin-Body and BOX Double-Insulating Silicon-on-Diamond MOSFET Effect of Cavity Disinfection Protocols on Microtensile Bond Strength of Universal Adhesive to Dentin