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By Hugues Dreysse

A truly complete e-book, allowing the reader to appreciate the fundamental formalisms utilized in digital constitution decision and especially the "Muffin Tin Orbitals" equipment. the most recent advancements are awarded, delivering a really special description of the "Full power" schemes. This ebook will offer a true cutting-edge, when you consider that just about all of the contributions on formalism haven't been, and won't be, released in different places. This ebook turns into a customary reference quantity. furthermore, functions in very energetic fields of modern study on magnetism are provided. a large spectrum of such questions is roofed by way of this booklet. for example, the paper on interlayer trade coupling should still develop into a "classic", for the reason that there was great experimental job for 10 years and this is often thought of to be the "final" theoretical resolution to this question. This paintings hasn't ever been provided in this kind of whole shape.

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Electronic Structure and Physical Properties of Solids: The Uses of the LMTO Method

A truly finished e-book, permitting the reader to appreciate the fundamental formalisms utilized in digital constitution choice and especially the "Muffin Tin Orbitals" equipment. the newest advancements are offered, delivering a really exact description of the "Full capability" schemes. This ebook will supply a true state-of-the-art, in view that just about all of the contributions on formalism haven't been, and won't be, released in different places.

Extra resources for Electronic Structure and Physical Properties of Solids: The Uses of the LMTO Method

Example text

Note that j – and not n – denotes the radial quantum number. N ]−1 = −   ≈− G (εi − εn ) , (78) N n=0 n=0 (εj − εn ) j as proved in Eq. (159) of the Appendix. We have thus seen that the triplevaluedness is of the same order as the error present in χ(N ) (r) due to the neglect of the energy-dependence of χ(N ) (ε, r) . The radial function j a (ε, r) in (75) vanishes for r ≤ a, where it has a kink of value 1/a2 , and it solves the radial wave equation for r ≥ a. As shown in [51], its expansion in powers of r − a ≥ 0 is: rj a (ε, r) = r−a 1 l (l + 1) − εa2 + a 3!

3 and 4 look more like a partial wave, ϕY, with a tail attached at its own screening sphere – and with kinks at all screening spheres. Hence the name ’kinked partial wave’ given in Ref. [19]. In this original derivation, kinked partial waves with a = s ≤ t were considered first, and only later, the limiting case a → 0 gave rise to a painful exercise. The kinked partial waves have in common with Slater’s original Augmented Plane Waves (APWs) [59], that they are partial waves, ϕ (ε, r) Y, of the proper energy inside nonoverlapping spheres, which are joined continuously – but with kinks – to waveequation solutions in the interstitial.

And the local contributions, ρϕ R (rR ) − ρR (rR ) , which vanish smoothly at their respective MT-sphere, are given by: YL (ˆ r) YL∗ (ˆ r) ρϕ R (r) = εF ϕRl (ε, r) ΓRL,RL (ε) ϕRl (ε, r) dε LL ◦ YL (ˆ r) YL∗ (ˆ r) ρϕ R (r) = εF ϕ◦Rl (ε, r) ΓRL,RL (ε) ϕ◦Rl (ε, r) dε . (66) LL The common density-of-states matrix in these equations is: occ cRL,i δ (ε − εi ) c∗R L ,i = ΓRL,R L (ε) = i 1 ImGRL,R L (ε + iδ) . π (67) The approximations inherent in (64) are that all cross-terms between products of ψ-, ϕ-, and ϕ◦ -functions, and between ϕ- or ϕ◦ -functions on different sites are neglected.

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