DOI: 10.1063/1.2359354. Thermal conductivity of phase-change material Ge2Sb2Te5

Thermal conductivity of phase-change material Ge2Sb2Te5

10.1063/1.2359354

Crossref journal-article

AIP Publishing

Applied Physics Letters (317)

Abstract

The thermal conductivity of thin films of the phase-change material Ge2Sb2Te5 is measured in the temperature range of 27°C&lt;T&lt;400°C using time-domain thermoreflectance. From the low thermal conductivity of amorphous phase, the conductivity increases irreversibly with increasing temperature and undergoes large changes with phase transformations. Thermal transport in the amorphous and early cubic phases can be described by a random walk of vibrational energy, i.e., the minimum thermal conductivity. In the hexagonal phase, the electronic contribution to the thermal conductivity is larger than the lattice contribution. Crystallization by laser processing produces a cubic phase with a lower thermal conductivity than cubic phases produced by thermal annealing; the authors attribute this difference in conductivity to a larger degree of atomic-scale disorder in films that are crystallized on short time scales.

Bibliography

Lyeo, H.-K., Cahill, D. G., Lee, B.-S., Abelson, J. R., Kwon, M.-H., Kim, K.-B., Bishop, S. G., & Cheong, B. (2006). Thermal conductivity of phase-change material Ge2Sb2Te5. Applied Physics Letters, 89(15).

Authors 8

Ho-Ki Lyeo (first)
David G. Cahill (additional)
Bong-Sub Lee (additional)
John R. Abelson (additional)
Min-Ho Kwon (additional)
Ki-Bum Kim (additional)
Stephen G. Bishop (additional)
Byung-ki Cheong (additional)

References 15 Referenced 267

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Dates

Type	When
Created	18 years, 10 months ago (Oct. 12, 2006, 1:29 a.m.)
Deposited	2 years, 2 months ago (June 25, 2023, 12:39 a.m.)
Indexed	3 weeks, 6 days ago (July 30, 2025, 6:48 a.m.)
Issued	18 years, 10 months ago (Oct. 9, 2006)
Published	18 years, 10 months ago (Oct. 9, 2006)
Published Online	18 years, 10 months ago (Oct. 10, 2006)
Published Print	18 years, 10 months ago (Oct. 9, 2006)

Funders 0

None

BibTeX

@article{Lyeo_2006, title={Thermal conductivity of phase-change material Ge2Sb2Te5}, volume={89}, ISSN={1077-3118}, url={http://dx.doi.org/10.1063/1.2359354}, DOI={10.1063/1.2359354}, number={15}, journal={Applied Physics Letters}, publisher={AIP Publishing}, author={Lyeo, Ho-Ki and Cahill, David G. and Lee, Bong-Sub and Abelson, John R. and Kwon, Min-Ho and Kim, Ki-Bum and Bishop, Stephen G. and Cheong, Byung-ki}, year={2006}, month=oct }

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