Melting of the Na layers in solid Na0.8CoO2

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Data of 23Na NMR spectra- and relaxation measurements are interpreted as suggesting that, upon increasing temperature the Na layers in Na0.8CoO2 adopt a 2D liquid state at T=291 K. The corresponding first order phase transition is preceded by a rapidly increasing mobility and diffusion of Na ions above 200K. Above 291 K the 23Na NMR response is similar to that previously observed in superionic conductors with planar Na layers.
4 pages, 4 figures

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Strongly Correlated Electrons

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http://salesiana.dossiersoluciones.com/handle/123456789/218441

Consulte el texto completo en el siguiente enlace:

https://arxiv.org/abs/0806.0493
 http://arxiv.org/abs/0806.0493
 Phys. Rev. Lett. 102, 056401 (2009)
 doi:10.1103/PhysRevLett.102.056401

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arXiv