Co59NMR Evidence for Charge Ordering belowTCO∼51  KinNa0.5CoO2 Academic Article uri icon

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abstract

  • The CoO2 layers in NaxCoO2 may be viewed as a spin S=1/2 triangular-lattice doped with charge carriers. The underlying physics of the cobaltates is very similar to that of the high T_(c) cuprates. We will present unequivocal 59Co NMR evidence that below T_(CO) approximately 51 K, the insulating ground state of the itinerant antiferromagnet Na0.5CoO2 (T_(N) approximately 86 K) is induced by charge ordering.

authors

publication date

  • February 29, 2008