Behavior of the energy gap near a commensurate-incommensurate transition in double-layer quantum Hall systems at nu =1.

@article{Read1995BehaviorOT,
  title={Behavior of the energy gap near a commensurate-incommensurate transition in double-layer quantum Hall systems at nu =1.},
  author={Read},
  journal={Physical review. B, Condensed matter},
  year={1995},
  volume={52 3},
  pages={
          1926-1931
        }
}
  • Read
  • Published 5 January 1995
  • Physics
  • Physical review. B, Condensed matter
The charged excitations in the system of the title are vortex-antivortex pairs in the spin-texture described in the theory by Yang et al which, in the commensurate phase, are bound together by a ``string''. It is shown that their excitation energy drops as the string lengthens as the parallel magnetic field approaches the critical value, then goes up again in the incommensurate phase. This produces a sharp downward cusp at the critical point. An alternative description based on the role of… 
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