Impurity state in Haldane gap for S=1 Heisenberg antiferromagnetic chain with bond doping

Details Impurity state in Haldane gap for S=1 Heisenberg antiferromagnetic chain with bond doping Impurity state in Haldane gap for S=1 Heisenberg antiferromagnetic chain with bond doping

1995-08-29

arxiv.org/abs/cond-mat/9508132v1

Physics

Condensed Matter

4 pages of uuencoded gzip'd postscript

Scientific paper

10.1103/PhysRevB.53.R492

Using a new impurity density matrix renormalization group scheme, we establish a reliable picture of how the low lying energy levels of a $S=1$ Heisenberg antiferromagnetic chain change {\it quantitatively} upon bond doping. A new impurity state gradually occurs in the Haldane gap as $J' < J$, while it appears only if $J'/J>\gamma_c$ with $1/\gamma_c=0.708$ as $J'>J$. The system is non-perturbative as $1\leq J'/J\leq\gamma_c$. This explains the appearance of a new state in the Haldane gap in a recent experiment on Y$_{2-x}$Ca$_x$BaNiO$_5$ [J.F. DiTusa, et al., Phys. Rev. Lett. 73 1857(1994)].

Affiliated with

Also associated with

No associations

Rating

Impurity state in Haldane gap for S=1 Heisenberg antiferromagnetic chain with bond doping does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Impurity state in Haldane gap for S=1 Heisenberg antiferromagnetic chain with bond doping, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Impurity state in Haldane gap for S=1 Heisenberg antiferromagnetic chain with bond doping will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-437766