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Experimental Determination of the State-dependent Enhancement of the Electron-positron Momentum Density in Solids by Laverock, J.; Haynes, T. D.; Alam, M. A.; Dugdale, S. B. is a scholarly article available to read on EtoBox.

What is Experimental Determination of the State-dependent Enhancement of the Electron-positron Momentum Density in Solids about?

The state-dependence of the enhancement of the electron-positron momentum density is investigated for some transition and simple metals (Cr, V, Ag and Al). Quantitative comparison with linearized muffin-tin orbital calculations of the corresponding quantity in the first Brillouin zone is shown to yield a measurement of the enhancement of the s, p and d states, independent of any parameterizations in terms of the electron density local to the positron. An empirical correction that can be applied to a first-principles state-dependent model is proposed that reproduces the measured state-dependence very well, yielding a general, predictive model for the enhancement of the momentum distribution of positron annihilation measurements, including those of angular correlation and coincidence Doppler broadening techniques.

Author

Laverock, J.; Haynes, T. D.; Alam, M. A.; Dugdale, S. B.

Published

2010

Language

EN