Quantum phases of the Shastry-Sutherland Kondo lattice: implications for the global phase diagram of heavy-fermion metals.

@article{Pixley2014QuantumPO,
  title={Quantum phases of the Shastry-Sutherland Kondo lattice: implications for the global phase diagram of heavy-fermion metals.},
  author={Jedediah H. Pixley and R Yu and Qimiao Si},
  journal={Physical review letters},
  year={2014},
  volume={113 17},
  pages={
          176402
        }
}
Considerable recent theoretical and experimental effort has been devoted to the study of quantum criticality and novel phases of antiferromagnetic heavy-fermion metals. In particular, quantum phase transitions have been discovered in heavy-fermion compounds with geometrical frustration. These developments have motivated us to study the competition between the Ruderman-Kittel-Kasuya-Yosida and Kondo interactions on the Shastry-Sutherland lattice. We determine the zero-temperature phase diagram… 
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References

SHOWING 1-10 OF 87 REFERENCES
Frustration and the Kondo Effect in Heavy Fermion Materials
The observation of a separation between the antiferromagnetic phase boundary and the small-large Fermi surface transition in recent experiments has led to the proposal that frustration is an
Global magnetic phase diagram and local quantum criticality in heavy fermion metals
We address the global magnetic phase diagram of Kondo lattice systems. Through the distinct Fermi surface properties of the various phases at zero temperature, we argue that the phase diagram
Quantum criticality and global phase diagram of magnetic heavy fermions
Quantum criticality describes the collective fluctuations of matter undergoing a second-order phase transition at zero temperature. It is being discussed in a number of strongly correlated electron
Destruction of the Kondo effect in the cubic heavy-fermion compound Ce3Pd20Si6.
TLDR
A cubic heavy-fermion material is identified as exhibiting a field-induced quantum phase transition, and it is shown how the material can be used to explore one extreme of the dimensionality axis, leading to a materials-based global phase diagram.
Approaching quantum criticality in a partially geometrically frustrated heavy-fermion metal
Quantum phase transitions have captured the interest of a large community in condensed-matter and atom physics research. The common feature of these very different material classes lies in the fact
Heavy Fermions and Quantum Phase Transitions
TLDR
Recent years have seen the identification of continuous quantum phase transitions, or quantum critical points, in a host of antiferromagnetic heavy-fermion compounds and quantum criticality has provided fresh insights into the electronic, magnetic, and superconducting properties of the heavy-FERmion metals.
Locally critical quantum phase transitions in strongly correlated metals
TLDR
The theoretical finding of a locally critical quantum phase transition in a model of heavy fermions is reported, and local criticality is proposed to be a phenomenon of general relevance to strongly correlated metals.
Frustration in the Kondo lattice model: Local versus extended singlet phases
We present a theoretical study of the frustrated Kondo lattice model on a Shastry-Sutherland-type lattice. Using a mean-field decoupling on both the Kondo and intersite exchange interactions, we
Quantum critical Kondo destruction in the Bose-Fermi Kondo model with a local transverse field
Recent studies of the global phase diagram of quantum-critical heavy-fermion metals prompt consideration of the interplay between the Kondo interactions and quantum fluctuations of the local moments
Onset of antiferromagnetism in heavy-fermion metals
TLDR
Evidence is found for an atomically local contribution to the magnetic correlations which develops at the critical gold concentration, corresponding to a magnetic ordering temperature of zero, which implies that a Fermi-liquid-destroying spin-localizing transition, unanticipated from the spin density wave description, coincides with the antiferromagnetic quantum critical point.
...
1
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3
4
5
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