Abstract
We present a non-perturbative theory of paramagnetically-driven superconducting (SC) phase transitions in heavy-fermion metals, which reliably determines their stable SC phases, treats properly the corresponding finite jumps of the order parameter, and can account for unusual features reported recently for this type of materials. It is found that for quasi-2D heavy-fermion metals, such as CeCoIn5, at high magnetic fields oriented perpendicular to the highly conducting planes, the effect of the Fulde-Ferrel (FF) modulation is too weak to prevent a direct first-order phase transition from the normal to the uniform SC state. For 3D heavy-fermion metals, such as URu2Si2, the FF modulation stabilizes, under a decreasing magnetic field, a non-uniform SC state via a second-order phase transition from the normal state. However, at a slightly lower field the modulated phase becomes unstable, transforming to a uniform SC state via a first-order transition.
Similar content being viewed by others
References
R. Settai et al., J. Phys.: Condens. Matter. 13, L627–634 (2001)
H. Ohkuni et al., Philos. Mag. B 79, 1045 (1999)
G. Sarma, J. Phys. Chem. Solids 24, 1029 (1963)
K. Maki, T. Tsuneto, Prog. Theor. Phys. 31, 945 (1964)
L.W. Gruenberg, L. Gunter, Phys. Rev. Lett. 16, 966 (1966)
P. Fulde, R.A. Ferrell, Phys. Rev. 135, A550 (1964)
A.I. Larkin, Yu.N. Ovchinnikov, Zh. Eksp. Teor. Fiz. 47, 1136 (1964) [Sov. Phys. JETP 20, 762 (1965)]
T. Maniv, V. Zhuravlev, Phys. Rev. B 77, 134511 (2008)
A. Bianchi et al., Phys. Rev. Lett. 89, 137002 (2002)
A. Bianchi et al., Phys. Rev. Lett. 91, 187004 (2003)
K. Kumagai et al., Phys. Rev. Lett. 97, 227002 (2006)
X. Gratens et al., cond-mat/0608722
Y. Kasahara et al., Phys. Rev. Lett. 99, 116402 (2007)
V. Zhuravlev, T. Maniv, Phys. Rev. B 80, 174520 (2009)
R. Ikeda, Phys. Rev. B 76, 134504 (2007)
Author information
Authors and Affiliations
Corresponding author
Rights and permissions
About this article
Cite this article
Zhuravlev, V., Maniv, T. & Wosnitza, J. Theory of Unusual Superconducting Phase Transitions in Heavy Fermion Metals at High Magnetic Fields. J Low Temp Phys 159, 138–142 (2010). https://doi.org/10.1007/s10909-009-0111-9
Received:
Accepted:
Published:
Issue Date:
DOI: https://doi.org/10.1007/s10909-009-0111-9