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Coherent potential approximation

About: Coherent potential approximation is a research topic. Over the lifetime, 1930 publications have been published within this topic receiving 36805 citations.


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Book ChapterDOI
01 Jan 1987
TL;DR: In this paper, the authors reviewed the progress made in the momentum density calculations in disordered alloys and interpreted the positron annihilation and Compton scattering experiments, particularly in making contact with experiment.
Abstract: During the past decade focus of the band theory seems to have shifted from Pure metals to disordered alloys. This has been possible by the application of ATA (average t-matrlx approximation) and CPA (coherent potential approximation) to the Potentials of muffln-tln form [I-4]. In this article i will review the recent Progress made in the momentum density calculations in disordered alloys [6-8], Particularly in making contact with experiment. This quantity is relevant in interpreting the positron annihilation and Compton scattering experiments.
Journal ArticleDOI
TL;DR: In this paper, the results of DOS calculations for the s-d valence band of disordered paramagnetic Cu 0.50 Ni0.50 alloy by the recursion method are presented for total and partial densities of states.
Abstract: The results of DOS calculations for the s-d valence band of disordered paramagnetic Cu0.50 Ni0.50 alloy by the recursion method are presentef for total and partial densities of states. Use of the CPA for the continued fraction termination has allowed to reveal the fine structure of the DOS in the band, which is due to non mean field features of the recursion method, also to reduce required computer time. Results for different sets of LCAO parameters, comparison of the DOS calculations with the experiment and other calculations results are presented.
Book ChapterDOI
01 Jan 1981
TL;DR: In this paper, the angular distribution of photo-emitted electrons from the (100), (110) and (111) surfaces of a number of CuxNi1-x random alloys, using ArI, NeI and HeI incident radiation, was compared with calculations based on the coherent potential approximation for nonoverlapping muffin-tin potentials.
Abstract: We report here studies of the angular distribution of photo-emitted electrons from the (100), (110) and (111) surfaces of a number of CuxNi1-x random alloys, using ArI, NeI and HeI incident radiation, and compare the results with calculations based on the coherent potential approximation for non-overlapping muffin-tin potentials (KKR-CPA). Good overall agreement confirms the existence of k-dependent energy bands in random alloys and demonstrates that U V angle-resolved photoelectron spectroscopy (ARPS) is a useful tool for studying the detailed behaviour.
Journal ArticleDOI
TL;DR: In this article, the transport properties of Pd-rich PdFe alloys are investigated as a function of the atomic and magnetic orders on the L21 (Cu3Au) lattice.
Abstract: The transport properties of Pd-rich PdFe alloys are investigated as a function of the atomic and magnetic orders on the L21 (Cu3Au) lattice. The residual resistivity, anisotropic magnetoresistance (AMR), and anomalous Hall effect are calculated from first-principles as a function of the atomic order. The calculations are based on the relativistic generalization of the transport Kubo–Greenwood approach as formulated in the framework of the first principles TB-LMTO method and Coherent Potential Approximation (CPA). The effect of the thermal magnetic disorder on the resistivity and AMR has been also studied using the disordered local moment approach based on the CPA. Our results are in an overall good agreement with available experimental data.
Journal ArticleDOI
TL;DR: In this paper, the authors used the coherent potential approximation (CPA) to determine the Green's functions using the usual method of treating dilute systems at T = 0 and considering the crystal as an array of uncorrelated bonds.
Abstract: A method used in the isotropic Heisenberg ferromagnet and antiferromagnet with S=1/2 at finite temperature is extended to the anisotropic antiferromagnetic case The Green's functions are determined using the coherent potential approximation (CPA) following the usual method of treating dilute systems at T=0 and considering the crystal as an array of uncorrelated bonds The transition temperature TN is found to lie between the RPA and the MF results The response functions at finite T, obtained by a 'alloy analogy', are compared with experimental data for CoF2 The agreement is reasonable at T

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Performance
Metrics
No. of papers in the topic in previous years
YearPapers
20234
202222
202127
202030
201930
201840