期刊
PHYSICAL REVIEW LETTERS
卷 110, 期 14, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.110.146406
关键词
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资金
- DFG [PR293/13-1]
- BMBF [IND 10/067, FOR 960, GRK 1621]
- ARRS [P1-0044]
- Office Of The Director
- Office Of Internatl Science &Engineering [952300] Funding Source: National Science Foundation
The explanation of heavy-fermion superconductivity is a long-standing challenge to theory. It is commonly thought to be connected to nonlocal fluctuations of either spin or charge degrees of freedom and therefore of unconventional type. Here we present results for the Kondo-lattice model, a paradigmatic model to describe heavy-fermion compounds, obtained from dynamical mean-field theory which captures local correlation effects only. Unexpectedly, we find robust s-wave superconductivity in the heavy-fermion state. We argue that this novel type of pairing is tightly connected to the formation of heavy quasiparticle bands and the presence of strong local spin fluctuations. DOI: 10.1103/PhysRevLett.110.146406
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