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Nonmagnetic Impurity in the Spin-gap State

Authors Nagaosa, Naoto
Ng, Tai Kai View this author's profile
Issue Date 1995
Source Physical Review B , v. 51, (21), June 1995, p. 15588-15591
Summary The effects of nonmagnetic strong scatterers (unitary limit) on magnetic and transport properties are studied for resonating-valence-bond states in both the slave-boson and slave-fermion mean-field theories with the gap for the triplet excitations. In the d-wave pairing state of the slave-boson mean-field theory in two dimensions, there is no true gap for spinons, but the Anderson localization occurs, which leads to the local moment when the repulsive interaction is taken into account. In the slave-fermion mean-field theory, local moments are found bound to nonmagnetic impurities as a result of (staggered) gauge interaction. However, in both theories, localization of spinon does not appear in the resistivity, which shows the classical value for the holon.
ISSN 2469-9950
Rights © 1995 American Physical Society
Language English
Format Article
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