First-order superconducting transition near a ferromagnetic quantum critical point

Andrey V. Chubukov, Alexander M. Finkel'stein, Robert Haslinger, Dirk K. Morr

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We address the issue of how triplet superconductivity emerges in an electronic system near a ferromagnetic quantum critical point (FQCP). Previous studies found that the superconducting transition is of second order, and [Formula presented] is strongly reduced near the FQCP due to pair-breaking effects from thermal spin fluctuations. In contrast, we demonstrate that near the FQCP, the system avoids pair-breaking effects by undergoing a first order transition at a much larger [Formula presented]. A second order superconducting transition emerges only at some distance from the FQCP.

Original languageEnglish (US)
Article number077002
Pages (from-to)077002/1-077002/4
Number of pages1
JournalPhysical Review Letters
Issue number7
StatePublished - Feb 21 2003

Bibliographical note

Funding Information:
It is our pleasure to thank A. Abanov, D. Khveschenko, D. Pines, A. Tsvelik, and Z. Wang for useful discussions. The research was supported by NSF DMR-9979749 (A. Ch.), BSF-1999354 (A. C. and A. F.), and by DR Project No. 200153 and the Department of Energy, under Contract No. W-7405-ENG-36 (R. H.). A. C. and D. M. thank Los Alamos National Laboratory for its hospitality.


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