Energy transport by neutral collective excitations at the quantum Hall edge

Details Energy transport by neutral collective excitations at the quantum Hall edge Energy transport by neutral collective excitations at the quantum Hall edge

2011-01-20

arxiv.org/abs/1101.4006v2

Phys. Rev. Lett. 106, 256802 (2011)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

Final version, as appear in PRL

Scientific paper

10.1103/PhysRevLett.106.256802

We use the edge of the quantum Hall sample to study the possibility for counter-propagating neutral collective excitations. A novel sample design allows us to independently investigate charge and energy transport along the edge. We experimentally observe an upstream energy transfer with respect to the electron drift for the filling factors 1 and 1/3. Our analysis indicates that a neutral collective mode at the interaction-reconstructed edge is a proper candidate for the experimentally observed effect.

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