LETTER TO THE EDITOR: Firstorder valence transition in YbInCu_{4} in the (B,T)plane
Abstract
The puzzling properties of the firstorder phase transition in YbInCu_{4} and its alloys in the wide range of magnetic fields and temperatures are perfectly described in terms of a simple entropy transition for free Yb ions. In particular, it turns out that the transition line in the (B,T)plane is very close to the elliptic shape, as it has been observed experimentally. Similar calculations are done, and the experiments are proposed for the (γα) phase transition in Ce in Megagauss fields. We speculate, that in the case of YbInCu_{4} the firstorder transition is a Mott transition between a higher temperature phase in which localized moments are stabilized by the entropy terms in the free energy, and a bandlike nonmagnetic ground state of the felectrons.
 Publication:

Journal of Physics Condensed Matter
 Pub Date:
 November 2000
 DOI:
 10.1088/09538984/12/47/102
 arXiv:
 arXiv:condmat/0008134
 Bibcode:
 2000JPCM...12L.711D
 Keywords:

 Condensed Matter  Strongly Correlated Electrons
 EPrint:
 RevTeX, 5 pages, 2 figures