Thumbnail
Access Restriction
Open

Author Yu, C. C.
Source United States Department of Energy Office of Scientific and Technical Information
Content type Text
Language English
Subject Keyword PHYSICS ♦ INTERMETALLIC COMPOUNDS ♦ KONDO EFFECT ♦ RENORMALIZATION ♦ GROUP THEORY ♦ RARE EARTH COMPOUNDS ♦ ELECTRONIC STRUCTURE ♦ ENERGY GAP ♦ IMPURITIES ♦ EXCHANGE INTERACTIONS ♦ RUDERMAN-KITTEL COUPLING ♦ MAGNETIC SUSCEPTIBILITY ♦ DENSITY MATRIX ♦ ONE-DIMENSIONAL CALCULATIONS
Abstract We have studied a Kondo hole in a one-dimensional Kondo insulator at half-filling using a density matrix formulation of the numerical renormalization group. The Kondo hole introduces midgap states. The spin density introduced by the hole is localized in the vicinity of the hole. It resides primarily in the {ital f} spins for small exchange coupling {ital J} and in the conduction spins for large {ital J}. We present results on the spin gap, charge gap, and neutral gap. The presence of the Kondo hole reduces the charge gap but not the spin gap relative to a Kondo insulator without defects. For small {ital J}, the spin gap is smaller than the charge gap, while for large {ital J}, the spin gap is larger than the charge gap. RKKY interactions are reduced by the Kondo hole as can be seen in the staggered susceptibility. {copyright} {ital 1996 The American Physical Society.}
ISSN 01631829
Educational Use Research
Learning Resource Type Article
Publisher Date 1996-12-01
Publisher Place United States
Journal Physical Review, B: Condensed Matter
Volume Number 54
Issue Number 22


Open content in new tab

   Open content in new tab