Splitting of roton minimum in the ν=5/2 Moore-Read state

Details Splitting of roton minimum in the ν=5/2 Moore-Read state Splitting of roton minimum in the ν=5/2 Moore-Read state

2011-06-16

arxiv.org/abs/1106.3311v1

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

4+ pages, 1 figure

Scientific paper

We calculate the dynamical structure factor of the \nu=5/2 non-abelian quantum Hall state in the dipole approximation, valid for large momenta. Due to the fact that both quasi-particles (qps) and quasi-holes (qhs) have an internal Majorana degree of freedom, a qp-qh pair has a fermionic degree of freedom which can be either empty or occupied, and leads to a splitting of the roton mode. Observation of this splitting by means of finite wavelength optical spectroscopy could provide evidence for Majorana modes in the \nu=5/2 quantum Hall state.

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