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Effect of band dispersion for renormalized gap on periodic Anderson model in infinite dimensions by Y Shimizu; O Sakai; A.C Hewson is a Physics and Astronomy article available to read on EtoBox.

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We investigate the e!ect of f-electron band dispersion on the renormalized gap in a periodic Anderson model in in"nite dimensions by employing the dynamical mean "eld theory and the numerical renormalization group method. When the non-interacting DOS of f-electron has a complete-gap, pseudo-gap and gap-less structure, respectively, in the elec-tron}hole symmetric case, an interacting DOS at low energies has the same structure which is renormalized by the electron correlation. The degree of renormalization is almost constant for the case having the complete gap, however, the renormalization in the pseudo-gap regime becomes stronger with increasing the dispersion of f-electron. For a weak electron}hole asymmetric case, n &0.9, a peak structure in PES region is nearly the same as that for symmetric case, but a peak in BIS region becomes broad.

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Author

Y Shimizu; O Sakai; A.C Hewson

Publisher

Elsevier Science; Elsevier ; Elsevier BV (ISSN 0921-4526)

Published

2000

Language

EN

Field

Physics and Astronomy (Physical Sciences)