Charge redistribution in Au-Ag alloys from a local perspective
- 15 April 1992
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review B
- Vol. 45 (16), 8924-8928
- https://doi.org/10.1103/physrevb.45.8924
Abstract
From x-ray-absorption near-edge-structure (XANES) measurements, we have obtained direct evidence for 5d charge depletion at the Au site for both concentrated and dilute Au-Ag alloys. This observation, together with x-ray photoemission of Au 4f and Ag 3d core levels, shows that Au gains non-d conduction charge and loses d charge while Ag gains d charge and loses non-d conduction charge; the net charge flow is negligibly small in accordance with the principle of electroneutrality. The sensitivity of XANES in probing small changes in the Au 5d charge redistribution (∼0.02d count) and relativistic effects in alloying is noted.Keywords
This publication has 22 references indexed in Scilit:
- Observations on the d-band width of AuAg and AuCu alloysSolid State Communications, 1991
- Partial densities of states of alloys:AuPhysical Review B, 1987
- Electric field gradients in Au-Te alloys and charge transfer in some intermetallic compounds of nontransition metals with goldPhysical Review B, 1979
- Pseudoalloy behavior at interfaces; AgAuApplied Physics Letters, 1979
- Electronic behavior in alloys: Gold-non-transition-metal intermetallicsPhysical Review B, 1979
- Charge Flow andCompensation in Gold AlloysPhysical Review B, 1971
- Correlation of the Mössbauer Isomer Shift and the Residual Electrical Resistivity forAlloysPhysical Review B, 1965
- Electron Transfer in Dilute Gold AlloysThe Journal of Chemical Physics, 1963
- Knight Shift in Silver Base Solid SolutionsPhysical Review B, 1962
- Nuclear Magnetic Resonance in Copper Alloys. Electron Distribution Around Solute AtomsPhysical Review B, 1960