Author
Listed:
- Yasuhiro Shimizu
(Graduate School of Science, Nagoya University)
- Hikaru Takeda
(Graduate School of Science, Nagoya University)
- Moe Tanaka
(Graduate School of Science, Nagoya University)
- Masayuki Itoh
(Graduate School of Science, Nagoya University)
- Seiji Niitaka
(RIKEN Advanced Science Institute)
- Hidenori Takagi
(RIKEN Advanced Science Institute)
Abstract
The pronounced enhancement of the effective mass is the primary phenomenon associated with strongly correlated electrons. In the presence of local moments, the large effective mass is thought to arise from Kondo coupling, the interaction between itinerant and localized electrons. However, in d electron systems, the origin is not clear because of the competing Hund's rule coupling. Here we experimentally address the microscopic origin for the heaviest d fermion in a vanadium spinel LiV2O4 having geometrical frustration. Utilizing orbital-selective 51V NMR, we elucidate the orbital-dependent local moment that exhibits no long-range magnetic order despite persistent antiferromagnetic correlations. A frustrated spin liquid, Hund-coupled to itinerant electrons, has a crucial role in forming heavy fermions with large residual entropy. Our method is important for the microscopic observation of the orbital-selective localization in a wide range of materials including iron pnictides, cobaltates, manganites and ruthnates.
Suggested Citation
Yasuhiro Shimizu & Hikaru Takeda & Moe Tanaka & Masayuki Itoh & Seiji Niitaka & Hidenori Takagi, 2012.
"An orbital-selective spin liquid in a frustrated heavy fermion spinel LiV2O4,"
Nature Communications, Nature, vol. 3(1), pages 1-5, January.
Handle:
RePEc:nat:natcom:v:3:y:2012:i:1:d:10.1038_ncomms1979
DOI: 10.1038/ncomms1979
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