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Pressure dependence of the level in rare-earth systems
Phys. Rev. B 14, 361 – Published 15 July, 1976
DOI: https://doi.org/10.1103/PhysRevB.14.361
Abstract
The pressure dependence of the position of a localized level relatie to the Fermi level is treated theoretically. For a rare-earth system (say divalent) a model is applied which treats the excited state as a trivalent impurity site in an otherwise divalent rare-earth ionic array. Special attention is paid to the pressure dependence of this excitation energy. In a calculation for metallic europium, the excitation is found to become unstable at 180 kbar, signaling an instability of the system towards an intermediate valence state. Similarly, the high-pressur trivalent europium phase is found unstable upon releasing the pressure below 350 kbar.
References (21)
- B. Johansson and A. Rosengran, Phys. Rev. B 11, 2836 (1975)
- B. Johansson, J. Phys. F 5, 1241 (1975)
- A. Jayaraman, V. Narayanamurti, E. Bucher, and R. G. Maines, Phys. Rev. Lett. 25, 1430 (1970)
- A. Jayaraman, A. K. Singh, A. Chatterjee, and S. Usha Devi, Phys. Rev. B 9, 2513 (1974)
- D. K. Wohlleben and B. R. Coles, in Magnetism, edited by H. Suhl (Academic, New York, 1973), Vol. V, p. 3
- P. Wachter, Solid State Commun. 7, 693 (1969)
- V. Narayanamurti, A. Jayaraman, and E. Bucher, Phys. Rev. B 9, 2521 (1974)
- L. M. Falicov and J. C. Kimball, Phys. Rev. Lett. 22, 997 (1969) R. Ramirez, L. M. Falicov, and J. C. Kimball, Phys. Rev. B 2, 3383 (1970) R. Ramirez and L. M. Falicov, ibid. 3, 2425 (1971)
- L. L. Hirst, J. Phys. Chem. Solids 35, 1285 (1974)
- J. F. Herbst, R. E. Watson, and J. W. Wilkins, Solid State Commun. 13, 1771 (1973)
- J. F. Herbst, D. N. Lowy, and R. E. Watson, Phys. Rev. B 6, 1913 (1972)
- B. Johansson, Phys. Rev. B 12, 3253 (1975)
- A. Rosengren and B. Johansson, Phys. Rev. B 13, 1468 (1976)
- Z. D. Popović, J. P. Carbotte, and G. R. Piercy, J. Phys. F 4, 351 (1974)
- K. S. Singwi, A. Sjölander, M. P. Tosi, and R. H. Land, Phys. Rev. B 1, 1044 (1970)
- D. Pines and P. Nozier̀es, The Theory of Quantum Liquids (Benjamin, New York, 1968), Vol. I
- P. O. Hedén, H. Löfgren, and S. B. M. Hagström, Phys. Status Solidi B 39, 721 (1972)
- J.-M. Mariot, R. C. Karnatak, and C. Bonnelle, J. Phys. Chem. Solids 35, 657 (1974)
- R. A. Stager and H. G. Drickamer, Phys. Rev. 133, A830 (1964) H. G. Drickamer and C. W. Frank, Electronic Transitions and the High Pressure Chemistry and Physics of Solids (Chapman and Hall, London, 1973)
- W. H. Gust and E. B. Royce, Phys. Rev. B 8, 3395 (1973)