Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Spin-Dynamics in the Carrier-Doped $S=1/2$ Triangular-Lattice of
  Na$_{x}$CoO$_{2}$-yH$_{2}$O   We probed the local electronic properties of the mixed-valent Co(+4-x)
triangular-lattice in Na{x}CoO{2}-yH{2}O by 59-Co NMR. We observed two distinct
types of Co sites for x>=1/2, but the valence seems averaged out for x~1/3.
Local spin fluctuations exhibit qualitatively the same trend down to ~100 K
regardless of the carrier-concentration x, and hence the nature of the
electronic ground state. A canonical Fermi-liquid behavior emerges below ~100 K
only for x~1/3.

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The categories of this paper are: stat
33
The categories of this paper are: plasm-ph
0
The categories of this paper are: hep-ph
31
The categories of this paper are: ao-sci
24
The categories of this paper are: dg-ga
8
The categories of this paper are: hep-ex
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The categories of this paper are: nucl-th
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The categories of this paper are: math-ph
20
The categories of this paper are: acc-phys
32
The categories of this paper are: atom-ph
9
The categories of this paper are: nlin
23
The categories of this paper are: solv-int
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The categories of this paper are: q-bio
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The categories of this paper are: patt-sol
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The categories of this paper are: chao-dyn
13
The categories of this paper are: quant-ph