DAFS - Universidad de Zaragoza

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$Difracción de Rayos X, neutrones y electrones$

EDAFS vs EXAFS EXAFS measurements at the ε ⊥ As K-edge (ESRF- BM30) ε // & ε ⊥ Multifit by Ifeffit code Differences between the two samples show up in EDAFS but not in EXAFS I3701 CP1276 Probing different As environments EDAFS measurements at the As K-edge (ESRF- BM2) CP1276 I3701 ε ⊥ 28/50
Abs II EXAFS and EDAFS best fit results II Sample→ paths (Å)↓ (As abs-As II) // (As abs-As II) ⊥ (As abs-P II) // (As abs-P II) ⊥ (As abs-In III) // (As abs-In III) ⊥ %P // %P ⊥ Abs. II As,P In InAs Bulk 4.284 4.284 - - 5.023 5.023 - - InAs/InP (pseud.) 4.15 4.29 - - 4.87 5.13 - - Pure strained InAs II shell Strain or distances InAsP alloy ? P content CP1276 (EXAFS ε ⊥ & ε //) 4.16±0.06 4.23±0.04 4.19±0.07 4.17±0.03 4.88±0.03 4.93±0.06 0.3±0.1 0.5±0.1 CP1276 (DAFS ε ⊥ ) - 4.30±0.04 - 4.20±0.06 - - - 0.4±0.2 I3701 (EXAFS ε ⊥ & ε //) 4.15±0.06 4.25±0.04 4.15±0.07 4.18±0.03 4.87±0.03 4.94±0.06 0.4±0.1 0.6±0.1 I3701 (DAFS ε ⊥ ) - 4.22±0.04 - 4.19±0.06 - - - 0.4±0.3 29/50
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: Diffraction Intensity (a.u.) GIDAFS
Page 31 and 32: GIDAFS oscillations analysis CP1276
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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