Correlation-driven heavy-fermion formation in LiV2O4

被引：45

作者：

Joensson, P. E.

Takenaka, K.

Niitaka, S.

Sasagawa, T.

Sugai, S.

Takagi, H.

机构：

[1] RIKEN, Wako, Saitama 3510198, Japan

[2] CREST, Japan Sci & Technol Agency, Kawagoe, Saitama 3320012, Japan

[3] Univ Tokyo, Dept Adv Mat Sci, Kashiwa, Chiba 2778581, Japan

[4] Nagoya Univ, Dept Phys, Chikusa Ku, Nagoya, Aichi 4648602, Japan

来源：

PHYSICAL REVIEW LETTERS | 2007年 / 99卷 / 16期

关键词：

D O I：

10.1103/PhysRevLett.99.167402

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Optical reflectivity measurements were performed on a single crystal of the d-electron heavy-fermion (HF) metal LiV2O4. Our results evidence the highly incoherent charge dynamics above T-*approximate to 20 K and the redistribution of the spectral weight of the optical conductivity over broad energy scales (similar to 5 eV) as the quantum coherence of the charge carriers is recovered. This reveals that LiV2O4 is close to a correlation-driven insulating state and indicates that, in sharp contrast to f-electron HF Kondo-lattice systems, strong electronic correlation effects dominate the heavy quasiparticle formation in LiV2O4.

引用

页数：4

共 39 条

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