Transition from Coulomb Diamonds to Checkerboard-like Spectroscopies in a Mesoscopic Quantum Hall Interferometer.

Melinte, Sorin
(2013) American Physical Society (APS) March Meeting — Location: Baltimore (USA) (18.March.2013)

Files

TransitionfromCoulombDiamondstoCheckerboard-likeSpectroscopiesinaMesoscopicQuantumHallInterferometer.pdf
  • Restricted Access
  • Adobe PDF
  • 79.53 KB
Request a copy

Details

Authors
Abstract
We report low temperature ( 100 mK) magnetotransport, scanning gate microscopy and scanning gate spectroscopy measurements in an In0:7Ga0:3As=In0:52Al0:48As quantum point contact (QPC). The magnetoresistance of the QPC shows oscillations in the vicinity of in- teger quantum Hall states. We attribute these magnetoresistance oscillations to the formation of an electron interferometer around a small, disorder-induced quantum Hall island located within the constriction. The magnetic eld B tunes the edge states conguration in the QPC, leading to dierent signatures in the transport measurements. Interestingly, near the Landau level lling factor = 3, the spectroscopy measurements performed on the quantum Hall interferometer, as a function of B or scanning gate tip voltage, exhibit a smooth transition from Coulomb diamonds to a checkerboard pattern.
Affiliations

Citations

  • APA
  • Chicago
  • FWB

Melinte, S. (2013). Transition from Coulomb Diamonds to Checkerboard-like Spectroscopies in a Mesoscopic Quantum Hall Interferometer. Bulletin of the American Physical Society, 1. https://hdl.handle.net/2078.5/231589