Observation of the Dirac fluid and the breakdown of the Wiedemann-Franz law in graphene
Ohki, T. A.
Fong, K. C.Note: Order does not necessarily reflect citation order of authors.
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CitationCrossno, J., J. K. Shi, K. Wang, X. Liu, A. Harzheim, A. Lucas, S. Sachdev, et al. 2016. “Observation of the Dirac Fluid and the Breakdown of the Wiedemann-Franz Law in Graphene.” Science 351 (6277) (February 11): 1058–1061. doi:10.1126/science.aad0343.
AbstractInteractions 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, due to decoupling of charge and heat currents within hydrodynamics. Employing high sensitivity Johnson noise thermometry, we report the breakdown of the Wiedemann-Franz law in graphene, with a thermal conductivity an order of magnitude larger than the value predicted by Fermi liquid theory. This result is a signature of the Dirac fluid, and constitutes direct evidence of collective motion in a quantum electronic fluid.
Citable link to this pagehttp://nrs.harvard.edu/urn-3:HUL.InstRepos:27303654
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