Magnetization and Spin Excitations of Non-Abelian Quantum Hall States

Details Magnetization and Spin Excitations of Non-Abelian Quantum Hall States Magnetization and Spin Excitations of Non-Abelian Quantum Hall States

2008-05-27

arxiv.org/abs/0805.4034v3

Phys. Rev. Lett. 101, 216808 (2008)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

Minor revisions. Final version as appeared in print

Scientific paper

10.1103/PhysRevLett.101.216808

Significant insights into non-Abelian quantum Hall states were obtained from studying special multi-particle interaction Hamiltonians, whose unique ground states are the Moore-Read and Read-Rezayi states for the case of spinless electrons. We generalize this approach to include the electronic spin-1/2 degree of freedom. We demonstrate that in the absence of Zeeman splitting the ground states of such Hamiltonians have large degeneracies and very rich spin structures. The spin structure of the ground states and low-energy excitations can be understood based on an emergent SU(3) symmetry for the case corresponding to the Moore-Read state. These states with different spin quantum numbers represent non-Abelian quantum Hall states with different magnetizations, whose quasi-hole properties are likely to be similar to those of their spin polarized counterparts.

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