Heavy-fermion-like state in a transition metal oxide LiV2O4 single crystal: indication of Kondo resonance in the photoemission spectrum.
Heavy-fermion-like state in a transition metal oxide LiV2O4 single crystal: indication of Kondo resonance in the photoemission spectrum.
复制标题
DOI：
10.1103/physrevlett.96.026403
复制
发表时间：
2006-01
影响因子：
8.6
通讯作者：
A. Shimoyamada;S. Tsuda;K. Ishizaka;T. Kiss;T. Shimojima;Tadashi Togashi;S. Watanabe;C. Zhang;C. Chen;Yoshitaka Matsushita;H. Ueda;Y. Ueda;S. Shin
中科院分区：
文献类型：
--
作者：
A. Shimoyamada;S. Tsuda;K. Ishizaka;T. Kiss;T. Shimojima;Tadashi Togashi;S. Watanabe;C. Zhang;C. Chen;Yoshitaka Matsushita;H. Ueda;Y. Ueda;S. Shin
我们对d电子重费米子类材料LiV_2O_4单晶进行了真空紫外激光激发光电子能谱研究。我们观察到一个尖锐的峰结构的态密度在约4 meV以上的费米能级（E（F））。峰高的演化与在热性质和输运性质中观察到的重费米子态的交叉行为很好地对应。峰结构的位置、形状和温度（T）依赖性与在常规f电子重费米子化合物中观察到的近藤共振非常相似。
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.