Alternative Feynman-diagram method for the general-spin Kondo problem

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Abstract

We introduce a new method of replacing spin operators with pseudofermions. For a spin value S there are 2S pseudofermions each of which can have spin up or down. In contrast to the standard Abrikosov method which has 2S+1 inequivalent fermions, i.e., one for each Sz value, the present pairs are all equivalent. It follows that the general spin expression is obtained by multiplying the S=(1/2 result by a ceratin combinational factor. This aids in the construction of rotationally invariant solutions for the general-spin Kondo problem for the case when n2S, where n is the number of conduction-electron scattering channels.

Original languageEnglish (US)
Pages (from-to)2220-2222
Number of pages3
JournalPhysical Review B
Volume37
Issue number4
DOIs
StatePublished - 1988

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Electron scattering
Feynman diagrams
Fermions
conduction electrons
electron scattering
fermions
operators

ASJC Scopus subject areas

  • Condensed Matter Physics

Cite this

Alternative Feynman-diagram method for the general-spin Kondo problem. / Barnes, Stewart.

In: Physical Review B, Vol. 37, No. 4, 1988, p. 2220-2222.

Research output: Contribution to journalArticle

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