Integer quantum Hall effect in double-layer systems.

@article{Srensen1996IntegerQH,
  title={Integer quantum Hall effect in double-layer systems.},
  author={S{\o}rensen and Macdonald},
  journal={Physical review. B, Condensed matter},
  year={1996},
  volume={54 15},
  pages={
          10675-10687
        }
}
We consider the localization of independent electron orbitals in double-layer two-dimensional electron systems in the strong magnetic-field limit. Our study is based on numerical Thouless number calculations for realistic microscopic models, and on transfer-matrix calculations for phenomenological network models. The microscopic calculations indicate a crossover regime for weak interlayer tunneling in which the correlation-length exponent appears to increase. Comparison of network model… 
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