Abstract
The effects of quenched disorder on the critical properties of itinerant quantum magnets are considered. Particular attention is paid to locally ordered rare regions that are formed in the presence of quenched disorder even when the bulk system is still in the nonmagnetic phase. It is shown that these local moments or instantons destroy the previously found critical fixed point in the case of antiferromagnets. In the case of itinerant ferromagnets, the critical behavior is unaffected by the rare regions due to an effective long-range interaction between the order parameter fluctuations.
Recommended Citation
R. S. Narayanan et al., "Influence of Rare Regions on Magnetic Quantum Phase Transitions," Physical Review Letters, vol. 82, no. 25, pp. 5132 - 5135, American Physical Society (APS), Jun 1999.
The definitive version is available at https://doi.org/10.1103/PhysRevLett.82.5132
Department(s)
Physics
International Standard Serial Number (ISSN)
0031-9007
Document Type
Article - Journal
Document Version
Final Version
File Type
text
Language(s)
English
Rights
© 1999 American Physical Society (APS), All rights reserved.
Publication Date
01 Jun 1999
