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2008

Doped Kagome System as Exotic Superconductor

Ko, Wing-Ho, Lee, Patrick A., Wen, Xiao-Gang

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A Chern--Simons theory for the doped spin-1/2 kagom\'e system is constructed, from which it is shown that the system is an exotic superconductor that breaks time-reversal symmetry.

It is also shown that the system carries minimal vortices of flux $hc/4e$ (as opposed to the usual $hc/2e$ in conventional superconductors) and contains fractional quasiparticles (including fermionic quasiparticles with \emph{semionic} mutual statistics and spin-1/2 quasiparticles with \emph{bosonic} self-statistics) in addition to the usual spin-1/2 fermionic Bougoliubov quasiparticle.
Two Chern--Simons theories--one with an auxiliary gauge field kept and one with the auxiliary field and a redundant matter field directly eliminated--are presented and shown to be consistent with each other.

Doped Kagome System as Exotic Superconductor · Around

Built on

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D.-H. Lee, Phys. Rev. B 60
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M. B. Hastings, Phys. Rev. B 63
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Then

P. Mendels, F. Bert, M. A. de Vries, A. Olariu, A. Harrison, F. Duc, J. C. Trombe, J. S. Lord, A. Amato, and C. Baines, Phys. Rev. Lett. 98
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Later among the works it cites.
Y. Ran, M. Hermele, P. A. Lee, and X.-G. Wen, Phys. Rev. Lett. 98
2007
Later among the works it cites.
M. Hermele, Y. Ran, P. A. Lee, and X.-G. Wen, Phys. Rev. B 77
2008
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M. A. de Vries, K. V. Kamenev, W. A. Kockelmann, J. Sanchez-Benitez, and A. Harrison, Phys. Rev. Lett. 100
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Y. Ran, W.-H. Ko, P. A. Lee, and X.-G. Wen, Phys. Rev. Lett. 102
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