Phys. Rev. Lett. 99, 236806 (2007) [4 pages]Particle-Hole Symmetry and the Pfaffian StateReceived 4 July 2007; published 6 December 2007 We show that the particle-hole conjugate of the Pfaffian state—or “anti-Pfaffian” state—is in a different universality class from the Pfaffian state, with different topological order. The two states can be distinguished easily by their edge physics: their edges differ in both their thermal Hall conductance and their tunneling exponents. At the same time, the two states are exactly degenerate in energy for a ν=5/2 quantum Hall system in the idealized limit of zero Landau level mixing. Thus, both are good candidates for the observed σxy=5/2(e2/h) quantum Hall plateau. © 2007 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.99.236806
DOI:
10.1103/PhysRevLett.99.236806
PACS:
73.43.Cd
|
|
About | Terms and Conditions | Subscriptions | Search | Help
Use of the American Physical Society websites and journals implies that the user has read and agrees to our Terms and Conditions and any applicable Subscription Agreement. Physical Review®, Physical Review Letters®, Reviews of Modern Physics®, and Physical Review Special Topics® are trademarks of the American Physical Society.