Locally critical point in an anisotropic Kondo lattice

Details Locally critical point in an anisotropic Kondo lattice Locally critical point in an anisotropic Kondo lattice

2002-07-22

arxiv.org/abs/cond-mat/0207493v6

Phys. Rev. Lett. 91, 026401 (2003)

Physics

Condensed Matter

Strongly Correlated Electrons

4 pages, 3 figures; published version

Scientific paper

10.1103/PhysRevLett.91.026401

We report the first numerical identification of a locally quantum critical point, at which the criticality of the local Kondo physics is embedded in that associated with a magnetic ordering. We are able to numerically access the quantum critical behavior by focusing on a Kondo-lattice model with Ising anisotropy. We also establish that the critical exponent for the q-dependent dynamical spin susceptibility is fractional and compares well with the experimental value for heavy fermions.

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