The αγ Transition of Cerium Is Entropy Driven

B. Amadon, S. Biermann, A. Georges, and F. Aryasetiawan
Phys. Rev. Lett. 96, 066402 – Published 15 February 2006

Abstract

We emphasize, on the basis of experimental data and theoretical calculations, that the entropic stabilization of the γ phase is the main driving force of the αγ transition of cerium in a wide temperature range below the critical point. Using a formulation of the total energy as a functional of the local density and of the f-orbital local Green’s functions, we perform dynamical mean-field theory calculations within a new implementation based on the multiple linear muffin tin orbital (LMTO) method, which allows us to include semicore states. Our results are consistent with the experimental energy differences and with the qualitative picture of an entropy-driven transition, while also confirming the appearance of a stabilization energy of the α phase as the quasiparticle Kondo resonance develops.

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  • Received 27 April 2005

DOI:https://doi.org/10.1103/PhysRevLett.96.066402

©2006 American Physical Society

Authors & Affiliations

B. Amadon1, S. Biermann2, A. Georges2, and F. Aryasetiawan3,4

  • 1Département de Physique Théorique et Appliquée, CEA, BP 12, 91680 Bruyères-le-Châtel, France
  • 2Ecole Polytechnique, Centre de Physique Théorique, 91128 Palaiseau Cedex, France
  • 3Research Institute for Computational Sciences, AIST, 1-1-1 Umezono, Tsukuba Central 2, Ibaraki 305-8568, Japan
  • 4CREST, Japan Science and Technology Agency, Japan

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Issue

Vol. 96, Iss. 6 — 17 February 2006

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