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Quantum critical end point for the Kondo volume collapse model.
1Department of Physics and Astronomy, Iowa State University and Ames Laboratory, Ames, Iowa 50011, USA.
Physical Review Letters
|December 13, 2006
Summary
Quantum critical fluctuations in f-electron metals cause novel phase line bifurcations. Critical strain fluctuations near the quantum critical endpoint can induce superconductivity and non-Fermi liquid behavior.
Area of Science:
- Condensed Matter Physics
- Materials Science
Background:
- The Kondo volume collapse describes valence transitions in f-electron metals.
- These transitions are characterized by first-order phase lines in the pressure-temperature phase plane, terminating at critical endpoints.
Purpose of the Study:
- Analyze the quantum critical endpoint (T=0) of the Kondo volume collapse.
- Investigate the effects of quantum critical fluctuations on the phase diagram.
- Determine the impact of critical strain fluctuations on material properties.
Main Methods:
- Theoretical analysis of the quantum critical endpoint.
- Calculation of thermodynamic properties: specific heat, thermal expansion, and compressibility.
- Investigation of critical strain fluctuation effects.
Main Results:
- Quantum critical fluctuations lead to a novel bifurcation of the first-order phase line.
- Critical strain fluctuations can induce superconductivity near the critical point.
- Critical strain fluctuations can also lead to non-Fermi liquid behavior.
Conclusions:
- The study reveals new phenomena near the quantum critical endpoint of the Kondo volume collapse.
- Understanding these phenomena is crucial for designing novel f-electron materials.
- Quantum criticality and strain fluctuations play a significant role in exotic electronic behaviors.
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