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 › peer-review

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 - 1999

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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@article{8f8f02f07ad349b0acee62eb3a164706,

title = "NMR study of magnetic excitations and pseudogap in HgBa2Ca3Cu4Oy",

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",

note = "Funding Information: This work has been partially supported by a Grant-in-Aid for Scientific Research on Priority Areas “Anomalous Metallic Phase near Mott Insulators” from the Ministry of Education, Science, Sports and Culture. One of authors (Y.T) have been supported by JSPS Research Fellowships for Young Scientists.",

year = "1999",

doi = "10.1016/S0921-4526(98)01066-7",

language = "English",

volume = "259-261",

pages = "571--572",

journal = "Physica B: Condensed Matter",

issn = "0921-4526",

publisher = "Elsevier",

}

TY - JOUR

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.

N1 - Funding Information: This work has been partially supported by a Grant-in-Aid for Scientific Research on Priority Areas “Anomalous Metallic Phase near Mott Insulators” from the Ministry of Education, Science, Sports and Culture. One of authors (Y.T) have been supported by JSPS Research Fellowships for Young Scientists.

PY - 1999

Y1 - 1999

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*.

KW - High-T superconductor

KW - NMR

KW - Pseudogap

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U2 - 10.1016/S0921-4526(98)01066-7

DO - 10.1016/S0921-4526(98)01066-7

M3 - Article

AN - SCOPUS:9344271522

VL - 259-261

SP - 571

EP - 572

JO - Physica B: Condensed Matter

JF - Physica B: Condensed Matter

SN - 0921-4526

ER -