High resolution study of magnetic ordering at absolute zero.

@article{Lee2004HighRS,
  title={High resolution study of magnetic ordering at absolute zero.},
  author={M. Lee and Anke Husmann and Thomas F. Rosenbaum and Gabriel Aeppli},
  journal={Physical review letters},
  year={2004},
  volume={92 18},
  pages={
          187201
        }
}
High resolution pressure measurements in the zero-temperature limit provide a unique opportunity to study the behavior of strongly interacting, itinerant electrons with coupled spin and charge degrees of freedom. Approaching the precision that has become the hallmark of experiments on classical critical phenomena, we characterize the quantum critical behavior of the model, elemental antiferromagnet chromium, lightly doped with vanadium. We resolve the sharp doubling of the Hall coefficient at… 

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References

SHOWING 1-10 OF 50 REFERENCES
Strongly enhanced magnetic excitations near the quantum critical point of Cr1-xVx and why strong exchange enhancement need not imply heavy fermion behavior.
TLDR
A large exchange enhancement is deduced, more than an order of magnitude larger than the corresponding enhancement of the low-temperature electronic heat capacity gammaT, of the wave vector-averaged spin relaxation rate gammaave for magnetically correlated metals.
Hall effect in nested antiferromagnets near the quantum critical point.
TLDR
It is found that the Hall coefficient should abruptly increase with the onset of magnetism, as recently observed in vanadium doped chromium, which is consistent with available data.
Magnetic Field-Tuned Quantum Criticality in the Metallic Ruthenate Sr3Ru2O7
TLDR
It is argued that observations on the itinerant metamagnet Sr3Ru2O7 represent good evidence for a new class of quantum critical point, arising when the critical end point terminating a line of first-order transitions is depressed toward zero temperature.
Quantum Critical Behavior for a Model Magnet.
TLDR
The phase diagram in the H_t−T plane is determined via magnetic susceptibility measurements and a solution of the full mean-field Hamiltonian using the known LiHoF_4 crystal-field wave functions, including nuclear hyperfine terms, accurately matches experiment.
New phase boundary in highly correlated, barely metallic V2O3.
TLDR
Analysis of the T→0 diffusive metallic conductivity at the approach to the insulator-metal transition indicates a different role for correlations depending upon the means employed to effect the transition.
Sharp signature of a dx2-y2 quantum critical point in the Hall coefficient of cuprate superconductors.
TLDR
There is a kink in n(Hall) at the critical value of the carrier concentration, x(c); as the critical point is approached from the ordered side, the slope of n( Hall) diverges, and Hall transport experiments in the cuprates should reveal this effect.
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.
Effect of a nonzero temperature on quantum critical points in itinerant fermion systems.
  • Millis
  • Physics
    Physical review. B, Condensed matter
  • 1993
TLDR
I reexamine the work of Hertz on quantum phase transitions in itinerant fermion systems and obtains different regimes of behavior of the correlation length and free energy in the disordered phase of the effective bosonic theory.
Quantum Phase Transitions
Abstract We give a general introduction to quantum phase transitions in strongly correlated electron systems. These transitions, which occur at zero temperature when a non-thermal parameter g such as
Non-Fermi-liquid behavior in d - and f -electron metals
A relatively new class of materials has been found in which the basic assumption of Landau Fermi-liquid theory—that at low energies the electrons in a metal should behave essentially as a collection
...
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