期刊
PHYSICAL REVIEW LETTERS
卷 108, 期 25, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.108.255901
关键词
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资金
- U.S. Department of Energy Office of Basic Energy Sciences [DE-FG02-07ER46459]
- Department of Defense NDSEG fellowship
- NSF [DMR0804126]
- Korea Institute for Science and Technology
The thermal conductivity of four Pd/Ir metal multilayers of total thickness 390 nm with 40, 80, 120, and 200 Pd/Ir interfaces are measured at temperatures between 78 and 295 K using time-domain-thermoreflectance. The thermal interface conductance G of the Pd/Ir interface is derived from the differences in thermal conductivity between the multilayers. A comparison of G to previously reported data for the electronic specific resistance of the Pd/Ir interface at 4 K supports the validity of the interfacial form of theWiedemann-Franz law. The Lorenz number deduced from this comparison is within 10% of the Sommerfeld value at all temperatures, well within the experimental uncertainties of approximate to 20%.
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