Magnetic-field induced quantum critical point in YbRh(2)Si(2).

@article{Gegenwart2002MagneticfieldIQ,
  title={Magnetic-field induced quantum critical point in YbRh(2)Si(2).},
  author={Philipp Gegenwart and Jerome Custers and C Geibel and K R Neumaier and Takashi Tayama and Kenichi Tenya and O. Trovarelli and Frank Steglich},
  journal={Physical review letters},
  year={2002},
  volume={89 5},
  pages={056402}
}
We report low-temperature calorimetric, magnetic, and resistivity measurements on the antiferromagnetic (AF) heavy-fermion metal YbRh(2)Si(2) ( T(N)=70 mK) as a function of magnetic field B. While for fields exceeding the critical value B(c0) at which T(N)-->0 the low-temperature resistivity shows an AT2 dependence, a 1/(B-B(c0)) divergence of A(B) upon reducing B to B(c0) suggests singular scattering at the whole Fermi surface and a divergence of the heavy quasiparticle mass. The observations… CONTINUE READING

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