Disorder, inhomogeneity and spin dynamics in f-electron non-Fermi liquid systems
| Autor: | Jeff Sonier, D. E. MacLaughlin, G. R. Stewart, Oscar Bernal, G. J. Nieuwenhuys, R. H. Heffner, M. B. Maple, Kenji Ishida |
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| Rok vydání: | 2004 |
| Předmět: |
Physics
Condensed matter physics Strongly Correlated Electrons (cond-mat.str-el) Relaxation (NMR) FOS: Physical sciences 02 engineering and technology Electron Muon spin spectroscopy 021001 nanoscience & nanotechnology Condensed Matter Physics Rotation 01 natural sciences Condensed Matter::Disordered Systems and Neural Networks Condensed Matter - Strongly Correlated Electrons Singularity 0103 physical sciences General Materials Science Condensed Matter::Strongly Correlated Electrons Fermi liquid theory 010306 general physics 0210 nano-technology Scaling Spin-½ |
| DOI: | 10.48550/arxiv.cond-mat/0404118 |
| Popis: | Muon spin rotation and relaxation ($\mu$SR) experiments have yielded evidence that structural disorder is an important factor in many f-electron-based non-Fermi-liquid (NFL) systems. Disorder-driven mechanisms for NFL behaviour are suggested by the observed broad and strongly temperature-dependent $\mu$SR (and NMR) linewidths in several NFL compounds and alloys. Local disorder-driven theories (Kondo disorder, Griffiths-McCoy singularity) are, however, not capable of describing the time-field scaling seen in muon spin relaxation experiments, which suggest cooperative and critical spin fluctuations rather than a distribution of local fluctuation rates. A strong empirical correlation is established between electronic disorder and slow spin fluctuations in NFL materials Comment: 24 pages, 15 figures, submitted to J. Phys.: Condens. Matter |
| Databáze: | OpenAIRE |
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