Impurity Energy Level Within The Haldane Gap

Details Impurity Energy Level Within The Haldane Gap Impurity Energy Level Within The Haldane Gap

1995-09-04

arxiv.org/abs/cond-mat/9509010v2

Physics

Condensed Matter

Latex file,9 pages uuencoded compressed postscript including 4 figures

Scientific paper

10.1103/PhysRevB.53.40

An impurity bond $J{'}$ in a periodic 1D antiferromagnetic, spin 1 chain with exchange $J$ is considered. Using the numerical density matrix renormalization group method, we find an impurity energy level in the Haldane gap, corresponding to a bound state near the impurity bond. When $J{'}J$. The impurity level appears only when the deviation $dev=(J{'}-J)/J{'}$ is greater than $B_{c}$, which is near 0.3 in our calculation.

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