期刊
PHYSICAL REVIEW LETTERS
卷 107, 期 14, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.107.146601
关键词
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资金
- National Science Foundation [DMR-1006230, DMR-1006533]
- U.S. Department of Energy [DE-FG02-07ER15842]
- Honda Motor Company
- Intel Company
- Intel PhD Fellowship
- Direct For Mathematical & Physical Scien
- Division Of Materials Research [1006533] Funding Source: National Science Foundation
We have performed temperature-dependent electrical transport measurements on known structure single wall carbon nanotubes at low bias. The experiments show a superlinear increase in nanotube resistivity with temperature, which is in contradiction with the linear dependence expected from nanotube acoustic-phonon scattering. The measured electron mean free path is also much lower than expected, especially at medium to high temperatures (> 100 K). A theoretical model that includes scattering due to surface polar phonon modes of the substrates reproduces the experiments very well. The role of surface phonons is further confirmed by resistivity measurements of nanotubes on aluminum nitride.
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