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Three-Dimensional Non-Fermi-Liquid Behavior from One-Dimensional Quantum Critical Local Moments
Laura Classen1, Igor Zaliznyak1, Alexei M Tsvelik1
1Condensed Matter Physics and Materials Science Division, Brookhaven National Laboratory, Upton, New York 11973-5000, USA.
Physical Review Letters
|May 15, 2018
Summary
This study investigates electrical resistivity in Yb2Pt2Pb, revealing non-Fermi liquid behavior due to critical spin chains. Researchers established a quasilinear temperature dependence of resistivity in this magnetic field-driven system.
Area of Science:
- Condensed Matter Physics
- Quantum Materials
- Magnetism
Background:
- The Yb2Pt2Pb system features itinerant electrons interacting with localized Yb ion spins (S=1/2).
- These spins exhibit a predominantly one-dimensional exchange interaction, forming critical spin chains under an external magnetic field.
Purpose of the Study:
- To investigate the temperature dependence of electrical resistivity in a system with critical spin chains and conduction electrons.
- To theoretically examine a Kondo lattice model with varying dimensionalities of interacting subsystems.
- To characterize non-Fermi liquid behavior arising from spin criticality.
Main Methods:
- Theoretical examination of a Kondo lattice model.
- Calculation of electronic relaxation rate.
- Calculation of DC resistivity.
Main Results:
- Established a quasilinear temperature dependence of the DC resistivity.
- Characterized non-Fermi liquid behavior driven by spin criticality.
- The spin subsystem behaves as a Luttinger liquid at criticality.
Conclusions:
- The interplay between critical spin chains and conduction electrons leads to non-Fermi liquid behavior.
- The theoretical model successfully captures the observed resistivity dependence.
- External magnetic fields are crucial for driving the system to criticality.
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