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|Title:||X-ray-edge singularities with nonconstant density of states: A renormalization-group approach||Authors:||Chen, K.
|Issue Date:||1995||Citation:||Chen, K., Jayaprakash, C. (1995). X-ray-edge singularities with nonconstant density of states: A renormalization-group approach. Physical Review B 52 (20) : 14436-14440. ScholarBank@NUS Repository. https://doi.org/10.1103/PhysRevB.52.14436||Abstract:||We present the results of a calculation of the x-ray absorption and photoemission spectra of metals based on the Wilson renormalization group (RG) (Wilson and co-workers) using free-electron, Lorentzian, and semicircular density of states. The deviation from the asymptotic singular behavior is studied. This illustrative calculation introduces an algorithm for obtaining a tridiagonalized (hopping) Hamiltonian from the logarithmically discretized conduction band. We provide a detailed description of the algorithm which renders the study of problems of impurities in metals with nonconstant conduction electron density of states using the RG method feasible. © 1995 The American Physical Society.||Source Title:||Physical Review B||URI:||http://scholarbank.nus.edu.sg/handle/10635/98611||ISSN:||01631829||DOI:||10.1103/PhysRevB.52.14436|
|Appears in Collections:||Staff Publications|
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