Aharonov-Bohm type oscillations in the system of two tunnel point-contacts in the presence of single scatterer: determination of the depth of the buried impurity

The conductance of a system containing two tunnel point-contacts and a single subsurface scatterer in the presence of a magnetic field is investigated theoretically. A general formula for the dependence of the conductance on the distance between contacts, the defect position, and the magnetic field...

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Published inJournal of physics. Conference series Vol. 400; no. 4; pp. 42031 - 4
Main Authors Khotkevych, N V, Kolesnichenko, Yu A, van Ruitenbeek, J M
Format Journal Article
LanguageEnglish
Published Bristol IOP Publishing 01.01.2012
Subjects
Conductance
Defects
Impurities
Magnetic fields
Magnetism
Oscillations
Physics
Tunnels
Tunnels (transportation)
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Summary:The conductance of a system containing two tunnel point-contacts and a single subsurface scatterer in the presence of a magnetic field is investigated theoretically. A general formula for the dependence of the conductance on the distance between contacts, the defect position, and the magnetic field is obtained. It is shown that in the presence of a magnetic field the conductance undergoes Aharonov-Bohm type oscillations. We find a simple relation between the period of the oscillations and the depth of the subsurface impurity. On the basis of this fact a new and easy method of determination the depth of the buried impurity is proposed.
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ISSN:1742-6588
1742-6596
DOI:10.1088/1742-6596/400/4/042031