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Автор(ы) : Cao G. X., Korshunov M. M., Gao Y. Z., Le Tacon M., Singh D. J., Lin C. T.
Заглавие : Anomalous in-plane electronic scattering in charge ordered Na 0.41CoO 2•0.6H 2O
Место публикации : Phys. Rev. Lett.: American Physical Society, 2012. - Vol. 108, Is. 23. - Ст.236401. - ISSN 0031-9007, DOI 10.1103/PhysRevLett.108.236401
Примечания : Cited References: 41. - We thank H. Habermeier, D. Mandrus, B. C. Sales, I. Eremin, I. I. Mazin, and P. J. Hirschfeld for useful discussions. G. Cao acknowledges support from NSFC (No. 10804068, 10774097). M. M. K. acknowledges support from RFBR (Grant No. 09-02-00127), Presisium of RAS program "Quantum physics of condensed matter" N5.7, Integration Grant of SBRAS-UrBRAS N40, and Russian FCP (GK 16.740.12.0731), and The Dynasty Foundation and ICFPM. Work at ORNL was supported by the Department of Energy, BES, Materials Science and Engineering Division.
Предметные рубрики: SUPERCONDUCTIVITY
TRIPLET
FLUCTUATIONS
IONS
Аннотация: We report electronic transport measurements on high quality floating zone grown NaxCoO2 and Na0.41CoO2·0.6H2O single crystals. We find an in-plane electronic scattering minimum near 11 K and a clear charge ordering at approximately 50 K. The electronic and magnetic properties in hydrated and nonhydrated Na0.41CoO2 samples are similar at higher temperature, but evolve in markedly different ways below ∼50 K, where a strong ferromagnetic tendency is observed in the hydrated sample. Model calculations show the relationship of this tendency to the structure of the Fermi surface. The results, particularly the clear differences between the hydrated and nonhydrated material show a substantially enhanced ferromagnetic tendency upon hydration. Implications for superconductivity are discussed.
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