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  Routes to heavy-fermion superconductivity

Steglich, F., Stockert, O., Wirth, S., Geibel, C., Yuan, H. Q., Kirchner, S., et al. (2013). Routes to heavy-fermion superconductivity. Journal of Physics Conference Series, 449: 012028, pp. 1-10. doi:10.1088/1742-6596/449/1/012028.

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Item Permalink: http://hdl.handle.net/11858/00-001M-0000-0015-1EFE-8 Version Permalink: http://hdl.handle.net/11858/00-001M-0000-0027-A279-E
Genre: Journal Article

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 Creators:
Steglich, F.1, Author              
Stockert, O.2, Author              
Wirth, S.3, Author              
Geibel, C.4, Author              
Yuan, H. Q.5, Author              
Kirchner, S.6, Author              
Si, Q., Author
Affiliations:
1Frank Steglich, Physics of Quantum Materials, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863467              
2Oliver Stockert, Physics of Quantum Materials, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863476              
3Steffen Wirth, Physics of Correlated Matter, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863460              
4Christoph Geibel, Physics of Quantum Materials, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863465              
5Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863404              
6Stefan Kirchner, cross-PKS/CPfS theory group, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863475              

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 Abstract: Superconductivity in lanthanide-and actinide-based heavy-fermion (HF) metals can have different microscopic origins. Among others, Cooper pair formation based on fluctuations of the valence, of the quadrupole moment or of the spin of the localized 4f/5f shell have been proposed. Spin-fluctuation mediated superconductivity in CeCu2Si2 was demonstrated by inelastic neutron scattering to exist in the vicinity of a spin-density-wave (SDW) quantum critical point (QCP). The isostructural HF compound YbRh2Si2 which is prototypical for a Kondo-breakdown QCP has so far not shown any sign of superconductivity down to T approximate to 10 mK. In contrast, results of de-Haas-van-Alphen experiments by Shishido et al. (J. Phys. Soc. Jpn. 74, 1103 (2005)) suggest superconductivity in CeRhIn5 close to an antiferromagnetic QCP beyond the SDW type, at which the Kondo effect breaks down. For the related compound CeCoIn5 however, a field-induced QCP of SDW type is extrapolated to exist inside the superconducting phase.

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Language(s): eng - English
 Dates: 2013-03-24
 Publication Status: Published in print
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Title: Journal of Physics Conference Series
Source Genre: Journal
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Pages: - Volume / Issue: 449 Sequence Number: 012028 Start / End Page: 1 - 10 Identifier: ISSN: 1742-6588

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Title: 10TH INTERNATIONAL CONFERENCE ON MATERIALS AND MECHANISMS OF SUPERCONDUCTIVITY (M2S-X)
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