Zero-Bias Anomalies in Narrow Tunnel Junctions in the Quantum Hall Regime
| Autor: | Jiang, P., Chien, C. -C., Yang, I., Kang, W., Baldwin, K. W., Pfeiffer, L. N., West, K. W. |
|---|---|
| Rok vydání: | 2010 |
| Předmět: | |
| Zdroj: | Phys. Rev. Lett. 105, 246801 (2010) |
| Druh dokumentu: | Working Paper |
| DOI: | 10.1103/PhysRevLett.105.246801 |
| Popis: | We report on the study of cleaved-edge-overgrown line junctions with a serendipitously created narrow opening in an otherwise thin, precise line barrier. Two sets of zero-bias anomalies are observed with an enhanced conductance for filling factors $\nu > 1$ and a strongly suppressed conductance for $\nu < 1$. A transition between the two behaviors is found near $\nu \approx 1$. The zero-bias anomaly (ZBA) line shapes find explanation in Luttinger liquid models of tunneling between quantum Hall edge states. The ZBA for $\nu < 1$ occurs from strong backscattering induced by suppression of quasiparticle tunneling between the edge channels for the $n = 0$ Landau levels. The ZBA for $\nu > 1$ arises from weak tunneling of quasiparticles between the $n = 1$ edge channels. Comment: version with edits for clarity |
| Databáze: | arXiv |
| Externí odkaz: |
|