標題: Strange superconductivity near an antiferromagnetic heavy-fermion quantum critical point
作者: Chang, Y. Y.
Hsu, F.
Kirchner, S.
Mou, C. Y.
Lee, T. K.
Chung, C. H.
電子物理學系
Department of Electrophysics
公開日期: 15-三月-2019
摘要: The heavy fermion systems CeMIn5 with M = Co, Rh, Ir, the "115" family, provide a prototypical example of strange superconductivity with unconventional d-wave pairing and strange metal normal state, emerged near an antiferromagnetic quantum critical point. The microscopic origin of strange superconductivity and its link to antiferromagnetic quantum criticality of the strange metal state are still long-standing open issues. We propose a microscopic mechanism for strange superconductors, based on the coexistence and competition between the Kondo correlation and the quasi-2d short-ranged antiferromagnetic resonating-valence-bond spin-liquid near the antiferromagnetic quantum critical point via a large-N Kondo-Heisenberg model and renormalization group analysis beyond the mean-field level. The interplay of these two effects provides a qualitative understanding on how superconductivity emerges from the strange metal state and the observed superconducting phase diagrams for CeMIn5.
URI: http://dx.doi.org/10.1103/PhysRevB.99.094513
http://hdl.handle.net/11536/151614
ISSN: 2469-9950
DOI: 10.1103/PhysRevB.99.094513
期刊: PHYSICAL REVIEW B
Volume: 99
Issue: 9
起始頁: 0
結束頁: 0
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