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  • Title: Heavy-fermion-like state in a transition metal oxide LiV2O4 single crystal: indication of Kondo resonance in the photoemission spectrum.
    Author: Shimoyamada A, Tsuda S, Ishizaka K, Kiss T, Shimojima T, Togashi T, Watanabe S, Zhang CQ, Chen CT, Matsushita Y, Ueda H, Ueda Y, Shin S.
    Journal: Phys Rev Lett; 2006 Jan 20; 96(2):026403. PubMed ID: 16486605.
    Abstract:
    We have performed a vacuum ultraviolet laser excited photoemission spectroscopy on a d-electron heavy-fermion-like material LiV2O4 single crystal. We observed a sharp peak structure in the density of states at approximately 4 meV above the Fermi level (E(F)). The evolution of the peak height corresponds well with the crossover behavior to the heavy-fermion-like state as observed in the thermal and transport properties. The position, shape, and temperature (T) dependence of the peak structure is quite similar to the Kondo resonance observed in conventional f-electron heavy Fermion compounds.
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