Cu-NMR Study on Bilayer High-Tc Cuprate La1.89Ca1.11Cu2O6+δ (La2126)

Takayuki Goto; Takao Watanabe; Kyoichi Kinoshita; Azusa Matsuda; Masafumi Sera; Shinichi Sakatsume; Tetsuo Fukase

doi:10.1143/JPSJ.65.2768

Cu-NMR Study on Bilayer High-T_c Cuprate La_1.89Ca_1.11Cu₂O_6+δ (La2126)

Takayuki Goto^*, Takao Watanabe, Kyoichi Kinoshita, Azusa Matsuda, Masafumi Sera, Shinichi Sakatsume, Tetsuo Fukase

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

2 Citations (Scopus)

Abstract

The temperature dependence of the ^63/65Cu-NMR relaxation rate T₁^-1 and the spectrum of the lightly doped high-T_c cuprate La_1.89Ca_1.11Cu₂O_6+δ (La2126) with bilayer CuO planes have been studied. The field-swept spectrum was explained by assuming that there are two Cu sites with quadrupole frequencies of ⁶³νΩ = 25.6 and 32 MHz. The Knight shift decreased monotonically with decreasing temperature in the normal state, which is consistent with the reported result that the system belongs to the lightly doped region where the hole content is less than the optimum value. The Curie-Weiss temperature dependence of (T₁T)^-1 = 2600/(T + 110) (K - s)^-1 in the normal state down to T_c indicates that the pseudo-spin gap does not always exist in lightly doped bilayer systems.

Original language	English
Pages (from-to)	2768-2771
Number of pages	4
Journal	journal of the physical society of japan
Volume	65
Issue number	9
DOIs	https://doi.org/10.1143/JPSJ.65.2768
Publication status	Published - 1996
Externally published	Yes

Keywords

LaCaCuO (La2126)
NMR
Pseudo-spin gap
T

ASJC Scopus subject areas

Physics and Astronomy(all)

Access to Document

10.1143/JPSJ.65.2768

Cite this

@article{0439a057570f49899039861f6d13a5be,

title = "Cu-NMR Study on Bilayer High-Tc Cuprate La1.89Ca1.11Cu2O6+δ (La2126)",

abstract = "The temperature dependence of the 63/65Cu-NMR relaxation rate T1-1 and the spectrum of the lightly doped high-Tc cuprate La1.89Ca1.11Cu2O6+δ (La2126) with bilayer CuO planes have been studied. The field-swept spectrum was explained by assuming that there are two Cu sites with quadrupole frequencies of 63νΩ = 25.6 and 32 MHz. The Knight shift decreased monotonically with decreasing temperature in the normal state, which is consistent with the reported result that the system belongs to the lightly doped region where the hole content is less than the optimum value. The Curie-Weiss temperature dependence of (T1T)-1 = 2600/(T + 110) (K - s)-1 in the normal state down to Tc indicates that the pseudo-spin gap does not always exist in lightly doped bilayer systems.",

keywords = "LaCaCuO (La2126), NMR, Pseudo-spin gap, T",

author = "Takayuki Goto and Takao Watanabe and Kyoichi Kinoshita and Azusa Matsuda and Masafumi Sera and Shinichi Sakatsume and Tetsuo Fukase",

year = "1996",

doi = "10.1143/JPSJ.65.2768",

language = "English",

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pages = "2768--2771",

journal = "journal of the physical society of japan",

issn = "0031-9015",

publisher = "Physical Society of Japan",

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T1 - Cu-NMR Study on Bilayer High-Tc Cuprate La1.89Ca1.11Cu2O6+δ (La2126)

AU - Goto, Takayuki

AU - Watanabe, Takao

AU - Kinoshita, Kyoichi

AU - Matsuda, Azusa

AU - Sera, Masafumi

AU - Sakatsume, Shinichi

AU - Fukase, Tetsuo

PY - 1996

Y1 - 1996

N2 - The temperature dependence of the 63/65Cu-NMR relaxation rate T1-1 and the spectrum of the lightly doped high-Tc cuprate La1.89Ca1.11Cu2O6+δ (La2126) with bilayer CuO planes have been studied. The field-swept spectrum was explained by assuming that there are two Cu sites with quadrupole frequencies of 63νΩ = 25.6 and 32 MHz. The Knight shift decreased monotonically with decreasing temperature in the normal state, which is consistent with the reported result that the system belongs to the lightly doped region where the hole content is less than the optimum value. The Curie-Weiss temperature dependence of (T1T)-1 = 2600/(T + 110) (K - s)-1 in the normal state down to Tc indicates that the pseudo-spin gap does not always exist in lightly doped bilayer systems.

AB - The temperature dependence of the 63/65Cu-NMR relaxation rate T1-1 and the spectrum of the lightly doped high-Tc cuprate La1.89Ca1.11Cu2O6+δ (La2126) with bilayer CuO planes have been studied. The field-swept spectrum was explained by assuming that there are two Cu sites with quadrupole frequencies of 63νΩ = 25.6 and 32 MHz. The Knight shift decreased monotonically with decreasing temperature in the normal state, which is consistent with the reported result that the system belongs to the lightly doped region where the hole content is less than the optimum value. The Curie-Weiss temperature dependence of (T1T)-1 = 2600/(T + 110) (K - s)-1 in the normal state down to Tc indicates that the pseudo-spin gap does not always exist in lightly doped bilayer systems.

KW - LaCaCuO (La2126)

KW - NMR

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KW - T

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