Related Experiment Videos
Non-fermi-liquid scaling in Ce(Ru0.5Rh)2Si2
Y Tabata1, D R Grempel, M Ocio
1Graduate School of Science, Osaka University, Toyonaka, Japan.
Physical Review Letters
|February 15, 2001
Summary
We investigated magnetic and transport properties of Ce(Ru0.5Rh0.5)2Si2, finding non-Fermi-liquid behavior driven by disorder at low fields and spin fluctuations at higher fields. This aligns with theories of Kondo alloys near a quantum critical point.
Area of Science:
- Condensed Matter Physics
- Quantum Materials Science
Background:
- Non-Fermi-liquid (NFL) behavior in heavy fermion compounds is a key area of research.
- Understanding the interplay of disorder, magnetic fluctuations, and electronic properties is crucial.
Purpose of the Study:
- To investigate the temperature and field dependence of magnetic and transport properties of Ce(Ru0.5Rh0.5)2Si2.
- To elucidate the mechanisms driving NFL behavior in this compound.
Main Methods:
- Experimental measurements of magnetic susceptibility and magnetoresistance.
- Analysis of temperature and field dependence of observed properties.
Main Results:
- At low fields (H < 0.1 T), NFL behavior is attributed to disorder.
- At higher fields, conduction electron coupling to critical spin fluctuations dominates.
- Observed susceptibility and magnetoresistance scaling agree with dynamical mean-field theories for Kondo alloys near a spin-glass quantum critical point.
Conclusions:
- The study reveals a field-dependent transition in the mechanism behind NFL behavior in Ce(Ru0.5Rh0.5)2Si2.
- Results support theoretical models describing quantum criticality in Kondo systems.