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Figure 6
(a) When the chopper is blocking the X-ray beam (`off'), only the conventional tunneling current is present. When the X-ray beam passes through the chopper (`on'), an additional X-ray excited current is generated. (b) Time sequence of the SX-STM current signal (top) and the associated chopper reference (bottom) recorded with the tip detector tunneling over the sample.

Journal logoJOURNAL OF
SYNCHROTRON
RADIATION
ISSN: 1600-5775
Volume 27| Part 5| September 2020| Pages 1382-1387
https://doi.org/10.1107/S1600577520007869
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