Measurement of interfacial thermal resistance in high-energy-density matter

Cameron H. Allen (), Matthew Oliver, Dirk O. Gericke, Nils Brouwer, Laurent Divol, Gregory E. Kemp, Otto L. Landen, Landon Morrison, Yuan Ping, Markus O. Schölmerich, Nathaniel Shaffer, Christopher Spindloe, Philip A. Sterne, Wolfgang R. Theobald, Tilo Döppner and Thomas G. White ()
Additional contact information
Cameron H. Allen: University of Nevada
Matthew Oliver: University of Nevada
Dirk O. Gericke: University of Warwick
Nils Brouwer: Holzkoppel 4
Laurent Divol: Lawrence Livermore National Laboratory
Gregory E. Kemp: Lawrence Livermore National Laboratory
Otto L. Landen: Lawrence Livermore National Laboratory
Landon Morrison: University of Nevada
Yuan Ping: Lawrence Livermore National Laboratory
Markus O. Schölmerich: Lawrence Livermore National Laboratory
Nathaniel Shaffer: University of Rochester
Christopher Spindloe: STFC Rutherford-Appleton Laboratory
Philip A. Sterne: Lawrence Livermore National Laboratory
Wolfgang R. Theobald: University of Rochester
Tilo Döppner: Lawrence Livermore National Laboratory
Thomas G. White: University of Nevada

Nature Communications, 2025, vol. 16, issue 1, 1-8

Abstract: Abstract Heat transport across interfaces is a ubiquitous phenomenon with many unresolved aspects. In particular, it is unknown if an interfacial thermal resistance (ITR) occurs in matter with high-energy-density where free electrons dominate the heat conduction. Here, we report on the first experimental evidence that a significant heat barrier is present between two different regions of high-energy-density matter: a strongly heated tungsten wire and a surrounding plastic layer that stays relatively cold. We use diffraction-enhanced imaging to track the time evolution of density discontinuities and reconstruct the temperature evolution in the quasi-stationary stage. The clear signatures of a temperature jump demonstrate the importance of the ITR for strongly heated systems with far-reaching implications for interpreting experiments and applications like inertial confinement fusion.

Date: 2025
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DOI: 10.1038/s41467-025-56051-1

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