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cond-mat1997
Soliton Confinement and the Excitation Spectrum of Spin-Peierls Antiferromagnets
Ian Affleck
The excitation spectrum of spin-Peierls antiferromagnets is discussed taking into acount phonon dynamics but treating inter-chain elastic couplings in mean field theory. This gives…
cond-mat1995
Is there an exponentially large Kondo screening cloud ?
Erik Sorensen, Ian Affleck
We make a precise scaling conjecture, based on renormalization group ideas, regarding the screening cloud around an impurity spin in the Kondo effect and test it numerically using…