Random spin-3/2 antiferromagnetic Heisenberg chains revisited
We revisit the spin-reduction transition in the random spin-$3/2$ antiferromagnetic Heisenberg chain using the tensor-network strong-disorder renormalization group (tSDRG). The predicted transition separates two random-singlet (RS) phases: one formed by effective spin-$1/2$ moments at weaker disorder and the other by f...