Cascade of Quantum Phase Transitions in Tunnel-Coupled Edge States

I. Yang, W. Kang, K. W. Baldwin, L. N. Pfeiffer, K. W. West

Research output: Contribution to journalArticlepeer-review


We report on the cascade of quantum phase transitions exhibited by tunnel-coupled edge states across a quantum Hall line junction. We identify a series of quantum critical points between successive strong and weak tunneling regimes in the zero-bias conductance. Scaling analysis shows that the conductance near the critical magnetic fields [Formula presented] is a function of a single scaling argument [Formula presented], where the exponent [Formula presented]. This puzzling resemblance to a quantum Hall-insulator transition points to the importance of interedge correlation between the coupled edge states.

Original languageEnglish (US)
Pages (from-to)4
Number of pages1
JournalPhysical review letters
Issue number5
StatePublished - 2004
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • General Physics and Astronomy


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