M. P. Jura, M. A. Topinka, M. Grobis, L. N. Pfeiffer, K. W. West, D. Goldhaber-Gordon
Published 2010-09-19Version 1
We show an electron interferometer between a quantum point contact (QPC) and a scanning gate microscope (SGM) tip in a two-dimensional electron gas. The QPC and SGM tip act as reflective barriers of a lossy cavity; the conductance through the system thus varies as a function of the distance between the QPC and SGM tip. We characterize how temperature, electron wavelength, cavity length, and reflectivity of the QPC barrier affect the interferometer. We report checkerboard interference patterns near the QPC and, when injecting electrons above or below the Fermi energy, effects of dephasing.
Comments: Text and supplementary information. Text: 4 pages, 4 figures. Supplementary information: 5 pages, 2 figures
Journal: Physical Review B 80, 041303(R) (2009)
Thermal Enhancement of Interference Effects in Quantum Point Contacts
What is measured in the scanning gate microscopy of a quantum point contact?
Origin of the 0.25-anomaly in the nonlinear conductance of a quantum point contact
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