Spin-3/2 random quantum antiferromagnetic chains

Abstract

We use a modified perturbative renormalization group approach to study the random quantum antiferromagnetic spin-3/2 chain. We find that in the case of rectangular distributions there is a quantum Griffiths phase and we obtain the dynamical critical exponent $Z$ as a function of disorder. Only in the case of extreme disorder, characterized by a power law distribution of exchange couplings, we find evidence that a random singlet phase could be reached. We discuss the differences between our results and those obtained by other approaches.

4 pages

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Cited by in corpus (11)

• Rare region effects at classical, quantum, and non-equilibrium phase transitions
• Strong disorder RG approach of random systems
• Disorder-Driven Non-Fermi Liquid Behavior of Correlated Electrons
• Experimental observation of quantum entanglement in low dimensional spin systems
• Nonadditive entropy for random quantum spin-S chains
• Entanglement Entropy in Random Quantum Spin-S Chains
• Disorder Induced Phases in Higher Spin Antiferromagnetic Heisenberg Chains
• Disorder-induced phases in the S=1 antiferromagnetic Heisenberg chain
• Random SU(2)-symmetric spin-$S$ chains
• Dynamical properties of the Haldane chain with bond disorder
• Renormalization-group investigation of the S=1 random antiferromagnetic Heisenberg Chain