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Spin dynamics in the carrier-doped S=1/2 triangular lattice of NaxCoO2.yH2O | | F L Ning
; T Imai
; B W Statt
; F C Chou
; | | Date: |
3 Dec 2004 | | Journal: | Phys Rev Lett, 93 (23), 237201 | | Abstract: | We probed the local electronic properties of the mixed-valent Co+4-x triangular lattice in NaxCoO2.yH(2)O by 59Co NMR. We observed two distinct types of Co sites for x > or =1/2, but the valence seems averaged out for x approximately 1/3. Local spin fluctuations exhibit qualitatively the same trend down to approximately 100 K regardless of the carrier concentration x, and hence the nature of the electronic ground state. A canonical Fermi-liquid behavior emerges below approximately 100 K only for x approximately 1/3. | | Source: | PubMed, pmid15601195 | | Services: | Forum | Review | Favorites | |
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