NMR study of magnetic excitations and pseudogap in HgBa2Ca3Cu4Oy

Y. Tokunaga; K. Ishida; K. Magishi; S. Ohsugi; G. Q. Zheng; Y. Kitaoka; K. Asayama; A. Iyo; K. Tokiwa; H. Ihara

doi:10.1016/S0921-4526(98)01066-7

NMR study of magnetic excitations and pseudogap in HgBa₂Ca₃Cu₄O_y

Y. Tokunaga, K. Ishida, K. Magishi, S. Ohsugi, G. Q. Zheng, Y. Kitaoka, K. Asayama, A. Iyo, K. Tokiwa, H. Ihara

Research output: Contribution to journal › Article

10 Citations (Scopus)

Abstract

We report systematic Cu-NMR study on HgBa₂Ca₃Cu₄O_10+y with T_c = 123K comprising respective 4-fold and 5-fold two CuO₂ planes surrounded by square and pyramidal oxygens. Possible structure and temperature dependence of the normal-state pseudogap have been extracted from the steep decrease of the spin contribution in the Knight shift, K_s below T_K* ∼ 220 K. By assuming the linear increase of a size of pseudogap between T_K* and T_c with the d_x2-y2 symmetry, the T-dependence of K_s/K_n in both 4- and 5-fold is reproduced below T_K*.

Original language	English
Pages (from-to)	571-572
Number of pages	2
Journal	Physica B: Condensed Matter
Volume	259-261
DOIs	https://doi.org/10.1016/S0921-4526(98)01066-7
Publication status	Published - Jan 1 1999
Externally published	Yes

Keywords

High-T superconductor
NMR
Pseudogap

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics
Electrical and Electronic Engineering

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Tokunaga, Y., Ishida, K., Magishi, K., Ohsugi, S., Zheng, G. Q., Kitaoka, Y., Asayama, K., Iyo, A., Tokiwa, K., & Ihara, H. (1999). NMR study of magnetic excitations and pseudogap in HgBa₂Ca₃Cu₄O_y. Physica B: Condensed Matter, 259-261, 571-572. https://doi.org/10.1016/S0921-4526(98)01066-7

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abstract = "We report systematic Cu-NMR study on HgBa2Ca3Cu4O10+y with Tc = 123K comprising respective 4-fold and 5-fold two CuO2 planes surrounded by square and pyramidal oxygens. Possible structure and temperature dependence of the normal-state pseudogap have been extracted from the steep decrease of the spin contribution in the Knight shift, Ks below TK* ∼ 220 K. By assuming the linear increase of a size of pseudogap between TK* and Tc with the dx2-y2 symmetry, the T-dependence of Ks/Kn in both 4- and 5-fold is reproduced below TK*.",

keywords = "High-T superconductor, NMR, Pseudogap",

author = "Y. Tokunaga and K. Ishida and K. Magishi and S. Ohsugi and Zheng, {G. Q.} and Y. Kitaoka and K. Asayama and A. Iyo and K. Tokiwa and H. Ihara",

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T1 - NMR study of magnetic excitations and pseudogap in HgBa2Ca3Cu4Oy

AU - Tokunaga, Y.

AU - Ishida, K.

AU - Magishi, K.

AU - Ohsugi, S.

AU - Zheng, G. Q.

AU - Kitaoka, Y.

AU - Asayama, K.

AU - Iyo, A.

AU - Tokiwa, K.

AU - Ihara, H.

PY - 1999/1/1

Y1 - 1999/1/1

N2 - We report systematic Cu-NMR study on HgBa2Ca3Cu4O10+y with Tc = 123K comprising respective 4-fold and 5-fold two CuO2 planes surrounded by square and pyramidal oxygens. Possible structure and temperature dependence of the normal-state pseudogap have been extracted from the steep decrease of the spin contribution in the Knight shift, Ks below TK* ∼ 220 K. By assuming the linear increase of a size of pseudogap between TK* and Tc with the dx2-y2 symmetry, the T-dependence of Ks/Kn in both 4- and 5-fold is reproduced below TK*.

AB - We report systematic Cu-NMR study on HgBa2Ca3Cu4O10+y with Tc = 123K comprising respective 4-fold and 5-fold two CuO2 planes surrounded by square and pyramidal oxygens. Possible structure and temperature dependence of the normal-state pseudogap have been extracted from the steep decrease of the spin contribution in the Knight shift, Ks below TK* ∼ 220 K. By assuming the linear increase of a size of pseudogap between TK* and Tc with the dx2-y2 symmetry, the T-dependence of Ks/Kn in both 4- and 5-fold is reproduced below TK*.

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