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arXiv · 1801.01214

Direct observation of heavy quasiparticles in the Kondo lattice CeIn3

Y. Zhang·W. Feng·X. Lou·T. L. Yu·X. G. Zhu·S. Y. Tan·B. K. Yuan·Y. Liu·H. Y. Lu·D. H. Xie·Q. Liu·W. Zhang·X. B. Luo·Y. B. Huang·L. Z. Luo·Z. J. Zhang·X. C. Lai·Q. Y. Chen
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Abstract

The electronic structure of the Kondo lattice CeIn3 has been studied by on-resonant angle-resolved photoemission spectroscopy and scanning tunneling microscopy/spectroscopy. A weakly dispersive quasiparticle band has been observed directly with an energy dispersion of 4 meV by photoemission, implying the existence of weak hybridization between the f electrons and conduction electrons. The hybridization is further confirmed by the formation of the hybridization gap revealed by temperature-dependent scanning tunneling spectroscopy. Moreover, we find the hybridization strength in CeIn3 is much weaker than that in the more two-dimensional compounds CeCoIn5 and CeIrIn5. Our results may be essential for the complete microscopic understanding of this important compound and the related heavy-fermion systems.

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Y. Zhang, W. Feng, X. Lou, T. L. Yu, X. G. Zhu, S. Y. Tan, B. K. Yuan, Y. Liu, H. Y. Lu, D. H. Xie, Q. Liu, W. Zhang, X. B. Luo, Y. B. Huang, L. Z. Luo, Z. J. Zhang, X. C. Lai, Q. Y. Chen. 2018-01-04. Direct observation of heavy quasiparticles in the Kondo lattice CeIn3. https://doi.org/10.1103/physrevb.97.045128

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