59Co NMR evidence for charge ordering below T_(CO) approximately 51 K in Na0.5CoO2 |
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| Authors: | Ning F L Golin S M Ahilan K Imai T Shu G J Chou F C |
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| Institution: | Department of Physics and Astronomy, McMaster University, Hamilton, Ontario L8S 4M1, Canada. |
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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. |
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