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arXiv · 0910.4466

Visualizing Quantum Well State Perturbations of Metallic Thin Films near Stacking Fault Defects

Alexander A. Khajetoorians·Gregory A. Fiete·Chih-Kang Shih
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Abstract

We demonstrate that quantum well states (QWS) of thin Pb films are highly perturbed within the proximity of intrinsic film defects. Scanning Tunneling Spectroscopy (STM/STS) measurements indicate that the energy of these states have a strong distance dependence within 4 nm of the defect with the strongest energetic fluctuations equaling up to 100 meV. These localized perturbations show large spatially-dependent asymmetries in the LDOS around the defect site for each corresponding quantum well state. These energetic fluctuations can be described by a simple model which accounts for fluctuations in the confinement potential induced by topographic changes.

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Alexander A. Khajetoorians, Gregory A. Fiete, Chih-Kang Shih. 2010-01-02. Visualizing Quantum Well State Perturbations of Metallic Thin Films near Stacking Fault Defects. https://doi.org/10.1103/physrevb.81.041413

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