Experimental visualization of scattering at defects in electronic transport through a single atomic junction
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For electronic transport at the nanoscale, coherent scattering at defects plays an important role. Therefore, the capability of visualizing the influence of defects on the conductivity of single atomic junctions may benefit the development of future nano-electronics. Here, we report imaging the coherent scattering from a defect with well-controlled geometry by quantum point contact microscopy recently developed by us. An ∼10% modulation in transport conductance of a single atomic junction is observed, with a phase shift of nearly π compared to the tunneling conductance. With the well-defined scattering geometry, we performed a theoretical calculation of the conductance and found the result consistent with the experiment.
Zhang , Y , Wahl , P & Kern , K 2013 , ' Experimental visualization of scattering at defects in electronic transport through a single atomic junction ' Physical Review. B, Condensed matter and materials physics , vol 87 , no. 20 , 205417 . DOI: 10.1103/PhysRevB.87.205417
Physical Review. B, Condensed matter and materials physics
© 2013. American Physical Society.
Funding: Chinese Scholarship Council