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Article overview
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Spin Reduction Transition in Spin-3/2 Random Heisenberg Chains | | Gil Refael
; Stefan Kehrein
; Daniel S. Fisher
; | | Date: |
15 Nov 2001 | | Journal: | Phys. Rev. B, Vol. 66, 060402 (2002) | | Subject: | Disordered Systems and Neural Networks; Strongly Correlated Electrons | cond-mat.dis-nn cond-mat.str-el | | 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 S_eff=3/2, while in the weak randomness phase the effective spins are S_eff=1/2. Separating them is a quantum critical point near which there is a non-trivial mixture of S=1/2, S=1, and S=3/2 effective spins at low temperatures. | | Source: | arXiv, cond-mat/0111295 | | Services: | Forum | Review | PDF | Favorites | |
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