Autor(en): | Stolze, Joachim Hamacher, Kay Wenzel, Wolfgang |
Titel: | Disorder Induced Quantum Phase transitions in Random-Exchange Spin-1/2 Chains |
Sprache (ISO): | en |
Zusammenfassung: | We investigate the effect of quenched bond disorder on the anisotropic antiferromagnetic spin-1/2 (XXZ) chain as a model for disorder-induced quantum phase transitions. We find nonuniversal behavior of the average correlation functions for weak disorder, followed by a quantum phase transition into a strongly disordered phase with only short-range xy correlations. We find no evidence for the universal strong-disorder fixed point predicted by the real-space renormalization group, suggesting a qualitatively different view of the relationship between quantum fluctuations and disorder. |
URI: | http://hdl.handle.net/2003/25450 http://dx.doi.org/10.17877/DE290R-2804 |
Erscheinungsdatum: | 2002-08-28 |
Provinienz: | The American Physical Society |
URL: | http:/dx.doi.org/10.1103/PhysRevLett.89.127202 |
Zitierform: | Hamacher, Kay; Stolze, Joachim; Wenzel, Wolfgang: Disorder Induced Quantum Phase transitions in Random-Exchange Spin-1/2 Chains. In: Physical Review Letters Nr. 12, Jg. 89(2002), 127202, doi: 10.1103/PhysRevLett.89.127202. |
Enthalten in den Sammlungen: | Stolze, Joachim Prof. Dr. |
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