Uniform hole doping in HgBa$_{2}$Ca$_{2}$Cu$_{3}$O$_{8+δ}$ studied by $^{63}$Cu NMR

Y. Itoh; A. Ogawa; S. Adachi

doi:10.1088/1742-6596/1293/1/012010

paper

Uniform hole doping in HgBa $_{2}$ Ca $_{2}$ Cu $_{3}$ O $_{8 + δ}$ studied by $^{63}$ Cu NMR

arXiv:1903.01526 · doi:10.1088/1742-6596/1293/1/012010

Abstract

We studied local magnetic properties of triple-CuO $_{2}$ -layer superconductors HgBa $_{2}$ Ca $_{2}$ Cu $_{3}$ O $_{8 + δ}$ with rich $^{63}$ Cu isotope (underdoped $T_{c}$ = 124 K and optimally doped $T_{c}$ = 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 $^{63} K_{spin}$ 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/ $T_{1} T$ ) was 190 K for the underdoped $T_{c}$ = 124 sample and 143 K for the optimally doped $T_{c}$ = 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 $^{63} K_{spin}^{ab}$ depends on whether the number of CuO $_{2}$ planes per unit cell is even or odd for the Hg-based multilayer cuprate superconductors.

arXiv comment8 pages, 7 figures, to be published in J. Phys.: Conf. Ser. (2019)

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Quest for nuclear quadrupole relaxation in HgCa $_{2}$ Ba $_{2}$ Cu $_{3}$ O $_{8 + δ}$

Uniform hole doping in HgBa2​Ca2​Cu3​O8+δ​ studied by 63Cu NMR

Abstract

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Cited by in corpus (1)

Uniform hole doping in HgBa $_{2}$ Ca $_{2}$ Cu $_{3}$ O $_{8 + δ}$ studied by $^{63}$ Cu NMR