Differential conductance oscillations in asymmetric quantum point contacts


Journal Article

© 2015 American Physical Society. Small differential conductance oscillations as a function of source-drain bias are observed and systematically studied in an asymmetric quantum point contact. These oscillations become significantly suppressed in a small in-plane magnetic field (∼0.7 T) or at higher temperatures (∼800 mK). Qualitatively, their temperature evolution can be simulated numerically based on smearing of the Fermi distribution, whereas features near zero bias cannot. Single-particle scenarios are unsatisfactory in accounting for the oscillations, suggesting that they are likely caused by electron- and spin-correlation effects.

Full Text

Duke Authors

Cited Authors

  • Zhang, H; Wu, PM; Chang, AM

Published Date

  • May 29, 2015

Published In

Volume / Issue

  • 91 / 19

Electronic International Standard Serial Number (EISSN)

  • 1550-235X

International Standard Serial Number (ISSN)

  • 1098-0121

Digital Object Identifier (DOI)

  • 10.1103/PhysRevB.91.195150

Citation Source

  • Scopus