Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Uniform hole doping in HgBa$_{2}$Ca$_{2}$Cu$_{3}$O$_{8+\delta}$ studied
  by $^{63}$Cu NMR   We studied local magnetic properties of triple-CuO$_2$-layer superconductors
HgBa$_2$Ca$_2$Cu$_3$O$_{8+\delta}$ with rich $^{63}$Cu isotope (underdoped
$T_\mathrm{c}$ = 124 K and optimally doped $T_\mathrm{c}$ = 134 K) by $^{63}$Cu
NMR spin-echo techniques. The temperature dependences of the $^{63}$Cu nuclear
spin-lattice relaxation rate $^{63}$(1/$T_1$) and the spin Knight shift
$^{63}K_\mathrm{spin}$ of the inner plane Cu(1) site were nearly the same as
those of the outer plane Cu(2) site in the normal states. The pseudogap
temperature $T^*$ defined as the maximum temperature of $^{63}$(1/$T_1T$) was
190 K for the underdoped $T_\mathrm{c}$ = 124 sample and 143 K for the
optimally doped $T_\mathrm{c}$ = 134 K sample. The NMR results indicate the
uniform hole distribution in the three layers, which is consistent with a
coalescence of three-derived Fermi surfaces predicted by a band theory. The
room temperature in-plane $^{63}K_\mathrm{spin}^{ab}$ depends on whether the
number of CuO$_2$ planes per unit cell is even or odd for the Hg-based
multilayer cuprate superconductors.

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The categories of this paper are: cmp-lg
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The categories of this paper are: ao-sci
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The categories of this paper are: physics
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The categories of this paper are: chem-ph
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The categories of this paper are: chao-dyn
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The categories of this paper are: hep-ex
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The categories of this paper are: cs
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The categories of this paper are: plasm-ph
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The categories of this paper are: patt-sol
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The categories of this paper are: hep-ph
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The categories of this paper are: hep-lat
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The categories of this paper are: bayes-an
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The categories of this paper are: acc-phys
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The categories of this paper are: funct-an
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The categories of this paper are: math-ph
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The categories of this paper are: stat