Physics – Condensed Matter – Strongly Correlated Electrons
Scientific paper
2008-06-03
Phys. Rev. Lett. 102, 056401 (2009)
Physics
Condensed Matter
Strongly Correlated Electrons
4 pages, 4 figures
Scientific paper
10.1103/PhysRevLett.102.056401
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.
Batlogg Bertram
Mattenberger Kurt
Ott Hans-Rudolf
Sacchetti Andrea
Weller Manfred
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