Published August 1, 2002
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Journal Article
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Spin reduction transition in spin-3/2 random Heisenberg chains
- Creators
- Refael, Gil
- Kehrein, Stefan
- Fisher, Daniel S.
Abstract
Random spin-3/2 antiferromagnetic Heisenberg chains are investigated using an asymptotically exact renormalization group. Randomness is found to induce a quantum phase transition between two random-singlet phases. In the strong randomness phase the effective spins at low energies are Seff=3/2, while in the weak randomness phase the effective spins are Seff=1/2. Separating them is a quantum critical point near which there is a nontrivial mixture of spin-1/2, spin-1, and spin-3/2 effective spins at low temperatures.
Additional Information
©2002 The American Physical Society Received 6 June 2002; published 2 August 2002 This work has been supported in part by the National Science Foundation via Grant Nos. DMR-9976621 and DMR-9809334. S.K. was also supported by a DFG Fellowship and through Grant No. SFB 484 of the DFG. G.R. would like to thank J. P. Sethna for useful discussions.Files
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Additional details
- Eprint ID
- 7132
- Resolver ID
- CaltechAUTHORS:REFprb02
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2007-01-09Created from EPrint's datestamp field
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2021-11-08Created from EPrint's last_modified field