Correlation between Tc and the hole density at Cu and Oxygen

G. q. Zheng; E. Yanase; K. Ishida; Y. Kitaoka; K. Asayama; Y. Kodama; S. Endo

doi:10.1016/0921-4534(91)91607-6

Correlation between T_c and the hole density at Cu and Oxygen

G. q. Zheng, E. Yanase, K. Ishida, Y. Kitaoka, K. Asayama, Y. Kodama, S. Endo

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

Abstract

Dependence of NQR frequency, ν _Q(Cu) on pressure up to 1.3GPa is reported for La_1.85Sr_0.15CuO₄ and YBa₂Cu₄O₈. Correlations are found between some physical quantities and the ratio of the hole density in Cu2 to that in 02(3), n(Cu2)/n(O2,3) which is extracted from ν Q's. It is proposed that there exists an optimum of n(Cu2)/n(O2,3) for T_c and that the increase of T_c under pressure is due to the approach of n(Cu2)/n(O2,3) to the optimum through the local hole transfer.

Original language	English
Pages (from-to)	767-768
Number of pages	2
Journal	Physica C: Superconductivity and its applications
Volume	185-189
Issue number	PART 2
DOIs	https://doi.org/10.1016/0921-4534(91)91607-6
Publication status	Published - Dec 1 1991
Externally published	Yes

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics
Energy Engineering and Power Technology
Electrical and Electronic Engineering

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10.1016/0921-4534(91)91607-6

Cite this

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title = "Correlation between Tc and the hole density at Cu and Oxygen",

abstract = "Dependence of NQR frequency, ν Q(Cu) on pressure up to 1.3GPa is reported for La1.85Sr0.15CuO4 and YBa2Cu4O8. Correlations are found between some physical quantities and the ratio of the hole density in Cu2 to that in 02(3), n(Cu2)/n(O2,3) which is extracted from ν Q's. It is proposed that there exists an optimum of n(Cu2)/n(O2,3) for Tc and that the increase of Tc under pressure is due to the approach of n(Cu2)/n(O2,3) to the optimum through the local hole transfer.",

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T1 - Correlation between Tc and the hole density at Cu and Oxygen

AU - Zheng, G. q.

AU - Yanase, E.

AU - Ishida, K.

AU - Kitaoka, Y.

AU - Asayama, K.

AU - Kodama, Y.

AU - Endo, S.

PY - 1991/12/1

Y1 - 1991/12/1

N2 - Dependence of NQR frequency, ν Q(Cu) on pressure up to 1.3GPa is reported for La1.85Sr0.15CuO4 and YBa2Cu4O8. Correlations are found between some physical quantities and the ratio of the hole density in Cu2 to that in 02(3), n(Cu2)/n(O2,3) which is extracted from ν Q's. It is proposed that there exists an optimum of n(Cu2)/n(O2,3) for Tc and that the increase of Tc under pressure is due to the approach of n(Cu2)/n(O2,3) to the optimum through the local hole transfer.

AB - Dependence of NQR frequency, ν Q(Cu) on pressure up to 1.3GPa is reported for La1.85Sr0.15CuO4 and YBa2Cu4O8. Correlations are found between some physical quantities and the ratio of the hole density in Cu2 to that in 02(3), n(Cu2)/n(O2,3) which is extracted from ν Q's. It is proposed that there exists an optimum of n(Cu2)/n(O2,3) for Tc and that the increase of Tc under pressure is due to the approach of n(Cu2)/n(O2,3) to the optimum through the local hole transfer.

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Correlation between T_c and the hole density at Cu and Oxygen

Abstract

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