DAFS - Universidad de Zaragoza
DAFS - Universidad de Zaragoza
DAFS - Universidad de Zaragoza
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EXAFS (ε // & ε ⊥)<br />
Similar results for the 2 samples<br />
Mixing of two different As<br />
environments<br />
Strained InAs & InAsP alloy<br />
?<br />
Intermixing As/P<br />
at the QWrs/capping<br />
interface<br />
P diffused QWrs<br />
Nice example of <strong>DAFS</strong> spatial<br />
selectivity and of strong<br />
EXAFS/<strong>DAFS</strong> complementarity<br />
GI<strong>DAFS</strong> probes the QWrs As atoms (the<br />
contribution of each atom <strong>de</strong>pends on Q)<br />
EXAFS probes all As atoms<br />
E<strong>DAFS</strong> (ε ⊥)<br />
Different results for the 2 samples<br />
Different As-As and As-P II shell dist.<br />
CP1276: InAs QWrs + As/P<br />
intermixing at interface<br />
& capping<br />
I3701: InAsP QWrs + As/P<br />
intermixing at interface<br />
& capping<br />
30/50
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