期刊
SCIENCE
卷 351, 期 6277, 页码 1058-1061出版社
AMER ASSOC ADVANCEMENT SCIENCE
DOI: 10.1126/science.aad0343
关键词
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资金
- U.S. Department of Energy [DE-SC0012260]
- Internal Research and Development
- Function Accelerated nanoMaterial Engineering (FAME) Center
- Semiconductor Research Corporation MARCO and Defense Advanced Research Projects Agency
- Army Research Office (ARO) Multidisciplinary University Research Initiative (MURI) [W911NF-14-1-0247]
- ARO [W911NF-14-1-0638]
- Agency for Science, Technology and Research (A*STAR)
- Gordon and Betty Moore Foundation's EPiQS Initiative [GBMF4543]
- Nano Material Technology Development Program through the National Research Foundation of Korea [2012M3A7B4049966]
- NSF [DMR-1360789, ECS-0335765]
- Templeton Foundation
- MURI from ARO [W911NF-14-1-0003]
- Government of Canada through Industry Canada
- Province of Ontario through the Ministry of Research and Innovation
- Elemental Strategy Initiative
- Japan Society for the Promotion of Science [262480621, 25106006]
- Raytheon BBN Technologies
- U.S. Department of Energy (DOE) [DE-SC0012260] Funding Source: U.S. Department of Energy (DOE)
- Division Of Materials Research
- Direct For Mathematical & Physical Scien [1360789] Funding Source: National Science Foundation
- National Research Foundation of Korea [2012M3A7B4049966] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
Interactions between particles in quantum many-body systems can lead to collective behavior described by hydrodynamics. One such system is the electron-hole plasma in graphene near the charge-neutrality point, which can form a strongly coupled Dirac fluid. This charge-neutral plasma of quasi-relativistic fermions is expected to exhibit a substantial enhancement of the thermal conductivity, thanks to decoupling of charge and heat currents within hydrodynamics. Employing high-sensitivity Johnson noise thermometry, we report an order of magnitude increase in the thermal conductivity and the breakdown of the Wiedemann-Franz law in the thermally populated charge-neutral plasma in graphene. This result is a signature of the Dirac fluid and constitutes direct evidence of collective motion in a quantum electronic fluid.
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