Ultra-low concentration phase separation in solids: Ag in (Cd, Hg)Te

Europhysics Letters

Volumn 45, Issue 2, 1999, Pages 201-207

  Lubomirsky, I ^a   Gurovich, E ^a   Safran, S A ^a   Cahen, D ^a  

^a WEIZMANN INSTITUTE OF SCIENCE   (Israel)

Author keywords

[No Author keywords available]

Indexed keywords

EID: 0033554907     PISSN: 02955075     EISSN: None     Source Type: Journal    
DOI: 10.1209/epl/i1999-00147-6     Document Type: Article

References (26)

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6. EBIC detects the presence of an internal electric field in a sample. Because a concentration gradient of an electrically active impurity (dopant) creates an internal electric field, an EBIC signal indicates the presence of such a gradient (for example, between p-and n-type regions). If the gradient is abrupt, then the field is localized within a thin layer and shows up as a line (fig. 1b). If the gradient is smeared out (gradual change between p and n regions) the EBIC signal appears as black or white areas (fig. 3b). The contrast on the picture (black or white) will depend on the direction of the internal electric field with respect to the electrode used to collect the EBICurrent (toward or away from the working electrode). In fig. 1b the working electrode is at the right and the grounded one at the left. In figs. 3 the working electrode is at the top and the grounded one at the bottom. The p-n junction region shows up white and the n-p one black.
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