Phys. Rev. B 54, 11936–11939 (1996)Behavior of magnetic impurities in gapless Fermi systemsReceived 24 July 1996; published in the issue dated 1 November 1996 In a number of systems, including certain semiconductors and unconventional superconductors, the effective density of states varies like |E-EF|r near the Fermi energy. The behavior of dilute magnetic impurities in such systems is studied using a nonperturbative renormalization-group approach. Close to particle-hole symmetry, the Kondo effect is suppressed for the cases of greatest relevance (r=1 and 2). Away from this symmetry, any quenching of the impurity moment is accompanied by a low-temperature decrease in the impurity resistivity, rather than the increase found in metals. © 1996 The American Physical Society. © 1996 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevB.54.11936
DOI:
10.1103/PhysRevB.54.11936
PACS:
75.20.Hr, 72.15.Qm, 74.70.Tx
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