DAFS - Universidad de Zaragoza

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$Difracción de Rayos X, neutrones y electrones$

EXAFS (ε // & ε ⊥) Similar results for the 2 samples Mixing of two different As environments Strained InAs & InAsP alloy ? Intermixing As/P at the QWrs/capping interface P diffused QWrs Nice example of DAFS spatial selectivity and of strong EXAFS/DAFS complementarity GIDAFS probes the QWrs As atoms (the contribution of each atom depends on Q) EXAFS probes all As atoms EDAFS (ε ⊥) Different results for the 2 samples Different As-As and As-P II shell dist. CP1276: InAs QWrs + As/P intermixing at interface & capping I3701: InAsP QWrs + As/P intermixing at interface & capping 30/50
GIDAFS oscillations analysis CP1276 k (Å -1 ) I3701 Different growth methods (IMM Madrid/ Ec. Centrale Lyon) GIDAFS lineshape give S D, φ 0 - φ A EDAFS fit (Ifeffit code) 31/50
Page 1 and 2: Universidad de Zaragoza Curso de Ma
Page 3 and 4: TÉCNICAS EXPERIMENTALES µ I diff
Page 5 and 6: EL DAFS El DAFS es la estructura fi
Page 7 and 8: Resonant atomic scattering factor f
Page 9 and 10: y 0 Structure factor: Multi-wavelen
Page 11 and 12: I F diff 0 F 0 Análisis de datos D
Page 13 and 14: Using the path formalism for descri
Page 15 and 16: Spatial selectivity : GaAs xP 1-x/G
Page 17 and 18: TEM InAs/InP QWrs AFM 200nm GaN/AlN
Page 19 and 20: Local structure study of InAs/InP Q
Page 21 and 22: As-O As K-edge EXAFS (BM8-ESRF) Int
Page 23 and 24: Grazing incidence diffraction BM2-D
Page 25 and 26: GI-DAFS (Grazing Incidence DAFS) k(
Page 27 and 28: Diffraction Intensity (a.u.) GIDAFS
Page 29: Abs II EXAFS and EDAFS best fit res
Page 33 and 34: EXAFS (ε // & ε ⊥) Similar resu
Page 35 and 36: Applications : Nanostructures III-V
Page 37 and 38: Applications : Nanostructures III-V
Page 39 and 40: BQ GaN/AlN 10ML : EXAFS vs DAFS k
Page 41 and 42: BQ GaN/AlN : EDAFS simulations h=2.
Page 43 and 44: Orden de carga y reflexiones prohib
Page 45 and 46: Estado electrónico de los sitios o
Page 47 and 48: Anisotropía del factor de dispersi
Page 49 and 50: Zona del umbral (DANES) Modelo refl
Page 51 and 52: Prepico Cálculos “ab initio” d
Page 53: Grazing Incidence Diffraction Anoma

DAFS - Universidad de Zaragoza

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