By M. Cardona, G. Güntherodt
This can be the 6th quantity of a well-established and well known sequence during which professional practitioners speak about topical facets of sunshine scattering in solids. This quantity discusses fresh result of Raman spectroscopy of excessive Tc superconductors, natural polymers, infrequent earth compounds, semimagnetic superconductors, and silver halides, in addition to advancements within the quickly starting to be box of time-resolved Raman spectroscopy. Emphasis is put on acquiring information regarding common excitations, the fundamental homes of fabrics, and using Raman spectroscopy as an analytical device. This quantity might be considered as an encyclopedia of condensed topic physics from the point of view of the Raman spectroscopist. it will likely be priceless to complicated scholars and to all researchers who practice Raman spectroscopy of their paintings.
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Extra info for Light Scattering in Solids IV: Electronic Scattering, Spin Effects, SERS and Morphic Effects
5. 71)J. The numbers indicate the order of the transitons involve the states of the free electrons (the appropriate optical gaps mentioned above). These features have been emphasized by B u r s t e i n et al. 52,95] in their consideration of resonant light scattering by 2-dim electron systems. 9,66]. ). 96]. 77a) (1/2, - 1/2)" (S),L. 77b) The intermediate states are in heavy, light and (spin-orbit) split-off valence bands. 79a) (3/2, - 1/2). 79b) G. Abstreiter et al. 80a) (1/2, - 1/2): (1/1//5) ( x - i Y)?
69). We find ,/,, ez eff ~"~-~ / ~ (~L' A. 68), for each component of electron spin. lZ> l is the interband matrix element of momentum. 96]. El and E2 are associated with the heavy and light effective mass valence bands, degenerate at the F-point. We can thus write EI -~Ez ~- Eo. 86) where A0 is the spin-orbit splitting of the top valence band states. We note that in the limit E0 >>he)L, this expression tbr A becomes identical to the inverse effective mass tensor of the Kane model, as expected.
68), we are labeling the states by their wavevector k and ignoring their spin quantum numbers. This is possible in the framework of the discussion of the previous section, dealing with spin-independent processes. 67], the scattering of light due to I~)~l/~) electronic excitations, where ~ and fl include spin, by means of the effective Hamiltonian e2 H'fr =~ NA (COL)A(COs). 70) where the coefficients 7~ take into account the H"p and H'ep type processes (Sect. 2). 71) whe:re Ifl'~ are intermediate states.