Manipulating and imaging the shape of an electronic wave function by magnetotunneling spectroscopy
Makarovsky, Oleg N.
Zambrano, Martha L.
Arce, Julio C.
Dickinson, L. A.
Maude, Duncan Kennedy
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We measure the current due to electrons tunneling through the ground state of hydrogenic Si donors placed in a GaAs quantum well in the presence of a magnetic field tilted at an angle to the plane of the well. The component of → B parallel to the direction of current compresses the donor wave function. By measuring the current as a function of the perpendicular component of → B , we probe how the magnetocompression affects the spatial form of the wave function and observe directly the transition from Coulombic to magnetic confinement at high fields.