Abstract
The heavy-fermion metal CePd1−x Rh x can be tuned from ferromagnetism at x = 0 to the nonmagnetic state at some critical concentration x c . The non-Fermi liquid behavior (NFL) at x ≃ x c is recognized by the power-law dependence of the specific heat C(T) given by the electronic contribution susceptibility X(T) and volume expansion coefficient α(T) at low temperatures: C/T ∝ X(T) ∝ α(T)/T∝ 1/ √T. We also demonstrate that the behavior of the normalized effective mass M *N observed in CePd1−x Rh x at x ≃ 0.8 agrees with that of M * N observed in paramagnetic CeRu2Si2 and conclude that these alloys exhibit the universal NFL thermodynamic behavior at their quantum critical points. We show that the NFL behavior of CePd1−x Rh x can be accounted for within the frameworks of the quasiparticle picture and fermion condensation quantum phase transition, while this alloy exhibits a universal thermodynamic NFL behavior that is independent of the characteristic features of the given alloy such as its lattice structure, magnetic ground state, dimension, etc.
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References
M. Vojta, Rep. Prog. Phys. 66, 2069 (2003).
H. von Löhneysen, A. Rosch, M. Vojta, and P. Wölfle, cond-mat/0606317.
J. S. Sereni et al., cond-mat/0602588.
A. P. Pikul et al., J. Phys.: Condens. Matter 18, L535 (2006).
R. Küchler et al., Phys. Rev. Lett. 96, 256403 (2006).
G. R. Stewart, Rev. Mod. Phys. 73, 797 (2001).
R. Küchler et al., Phys. Rev. Lett. 91, 066405 (2003).
T. R. Kirkpatrick and D. Belitz, Phys. Rev. B 67, 024419 (2003).
V. R. Shaginyan, JETP Lett. 79, 286 (2004).
J. Paglione et al., Phys. Rev. Lett. 97, 106606 (2006).
V. R. Shaginyan, A. Z. Msezane, V. A. Stephanovich, and E. V. Kirichenko, Europhys. Lett. 76, 898 (2006).
M. Ya. Amusia and V. R. Shaginyan, Phys. Rev. B 63, 224507 (2001).
M. Ya. Amusia and V. R. Shaginyan, JETP Lett. 73, 232 (2001).
E. M. Lifshitz and L. P. Pitaevskiĭ, Course of Theoretical Physics, Vol. 9: Statistical Physics, 2nd ed. (Fizmatlit, Moscow, 2001; Butterworth-Heinemann, Oxford, 1999), Part 2.
M. Pfitzner and P. Wölfle, Phys. Rev. B 33, 2003 (1986).
V. R. Shaginyan, JETP Lett. 77, 99 (2003).
E. M. Lifshitz and L. P. Pitaevskiĭ, Course of Theoretical Physics, Vol. 9: Statistical Physics, 2nd ed. (Fizmatlit, Moscow, 2002; Butterworth-Heinemann, Oxford, 2000), Part 1.
V. R. Shaginyan, JETP Lett. 80, 263 (2004).
P. Noziéres, J. Phys. I 2, 443 (1992).
M. V. Zverev, V. A. Khodel, and V. R. Shaginyan, JETP Lett. 65, 863 (1997).
M. Ya. Amusia, A. Z. Msezane, and V. R. Shaginyan, Phys. Lett. A 320, 459 (2004).
V. R. Shaginyan, JETP Lett. 77, 178 (2003).
J. W. Clark, V. A. Khodel, and M. V. Zverev, Phys. Rev. B 71, 012401 (2005).
D. Takahashi et al., Phys. Rey. B 67, R180407 (2003).
V. R. Shaginyan, JETP Lett. 79, 286 (2004).
V. R. Shaginyan, M. Ya. Amusia, and A. Z. Msezane, Phys. Lett. A 338, 393 (2005).
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Shaginyan, V.R., Popov, K.G. & Artamonov, S.A. Universal behavior of CePd1−x Rh x ferromagnet at the quantum critical point. Jetp Lett. 85, 398–403 (2007). https://doi.org/10.1134/S0021364007080115
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DOI: https://doi.org/10.1134/S0021364007080115