Phys. Rev. Lett. 98, 026802 (2007) [4 pages]Microscopic Basis for the Mechanism of Carrier Dynamics in an Operating p-n Junction Examined by Using Light-Modulated Scanning Tunneling Spectroscopy
See accompanying Physics Focus The doping characteristics and carrier transport in a GaAs p-n junction were visualized with a ∼10 nm spatial resolution, using light-modulated scanning tunneling spectroscopy. The dynamics of minority carriers under operating conditions, such as recombination, diffusion, and electric field induced drift, which had previously been analyzed on the basis of empirical electric properties, were successfully examined on the nanoscale. These results provide a solid basis for elucidating the mechanism of the carrier transport properties predicted by using the macroscopic analysis. © 2007 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.98.026802
DOI:
10.1103/PhysRevLett.98.026802
PACS:
87.64.Dz, 73.40.Kp, 73.43.Fj
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