Abstract
In layered samples which exhibit a bulk quantum Hall effect (QHE), a two-dimensional (2D) surface “sheath” of gapless excitations is expected. These excitations comprise a novel 2D chiral quantum liquid which should dominate the low temperature transport along the field ( axis). For the integer QHE, we show that localization effects are completely absent in the “sheath,” giving a metallic -axis conductivity. For fractional filling , the sheath is a 2D non-Fermi-liquid, with incoherent -axis transport and . Experimental implications for the Bechgaard salts are discussed.
- Received 17 October 1995
DOI:https://doi.org/10.1103/PhysRevLett.76.2782
©1996 American Physical Society