Charge-density wave resonance

Charge density wave, 54 Charge spreading, 127 Charge-resonant states, 13, 18 Charge-asymmetric dissociation, 9 Coherent control, 7... 

Many origins have been proposed for the T line, ranging from subtle structural distortions to electronic distortions like a charge density wave. Among the structural distortions, Walstedt et al. originally proposed that T could be surrounded by misoriented C60 or be a neighbor of an octahedral site where the alkali atom would be displaced (the Debye-Waller factor for O sites presents some anomalies). SEDOR double-resonance experiments put some very strict con-... 

When the atom comes closer to the metal surface, the electron wave functions of the atom start to feel the charge density of the metal. The result is that the levels 1 and 2 broaden into so-called resonance levels, which have a Lorentzian shape. Strictly speaking, the broadened levels are no longer atomic states, but states of the combined system of atom plus metal, although they retain much of their atomic character. Figure A.9 illustrates the formation of broadened adsorbate... 

Figure 19. A plot of the charge density obtained from a linear combination of all the resonant amplitudes in e-Mg scattering withx(r) = Xi(r)+Xn(r)+Xni(r), where the individual amplitudes are considered to describe different parts of the same resonant wave packet. The nodal pattern for 8 = 0.0 favors its identification as the lowest Sp-iype unoccupied orbital of Mg. The role of optimal theta (8, = 0.12 radians) in shifting the electron density near the nucleus is clearly seen.

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