Superconducting phase diagram in Ca2-xNaxCuO 2Cl2-yBry

Yuji Zenitani; Teruhiko Suzuki; Hirokazu Kawashima; Jun Akimitsu

doi:10.1016/j.physc.2004.12.002

Superconducting phase diagram in Ca_2-xNa_xCuO ₂Cl_2-yBr_y

Yuji Zenitani, Teruhiko Suzuki, Hirokazu Kawashima, Jun Akimitsu

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

4 Citations (Scopus)

Abstract

Ca₂CuO₂Cl_2-yBr_y (0 ≤ y ≤ 2) has the K₂NiF₄-type structure with halogens (Cl and Br) at their apical sites and superconductivity can be achieved by substituting Ca²⁺ sites with Na⁺. We have succeeded in making a comprehensive superconducting phase diagram of Ca_2-xNa _xCuO₂Cl_2-yBr_y by focusing on special attention to the relationship between the superconductivity and the Cu and Cl/Br distance in Ca_2-xNa_xCuO₂Cl _2-yBr_y. We were successful in continuously changing the length of c-axis, which is closely related to the distance between the apical site and the CuO₂ plane, or the distance between Cu and Cl/Br. Without changing the bonding distance between Cu and O in the CuO₂ plane. This is the first example of this kind of control in cuprate superconductors.

Original language	English
Pages (from-to)	32-40
Number of pages	9
Journal	Physica C: Superconductivity and its applications
Volume	419
Issue number	1-2
DOIs	https://doi.org/10.1016/j.physc.2004.12.002
Publication status	Published - Feb 15 2005
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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title = "Superconducting phase diagram in Ca2-xNaxCuO 2Cl2-yBry",

abstract = "Ca2CuO2Cl2-yBry (0 ≤ y ≤ 2) has the K2NiF4-type structure with halogens (Cl and Br) at their apical sites and superconductivity can be achieved by substituting Ca2+ sites with Na+. We have succeeded in making a comprehensive superconducting phase diagram of Ca2-xNa xCuO2Cl2-yBry by focusing on special attention to the relationship between the superconductivity and the Cu and Cl/Br distance in Ca2-xNaxCuO2Cl 2-yBry. We were successful in continuously changing the length of c-axis, which is closely related to the distance between the apical site and the CuO2 plane, or the distance between Cu and Cl/Br. Without changing the bonding distance between Cu and O in the CuO2 plane. This is the first example of this kind of control in cuprate superconductors.",

author = "Yuji Zenitani and Teruhiko Suzuki and Hirokazu Kawashima and Jun Akimitsu",

note = "Funding Information: This study was supported by a grant for scientific research, the 21st Century COE program of the Ministry of Education, Culture, Sports, Science and Technology.",

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T1 - Superconducting phase diagram in Ca2-xNaxCuO 2Cl2-yBry

AU - Zenitani, Yuji

AU - Suzuki, Teruhiko

AU - Kawashima, Hirokazu

AU - Akimitsu, Jun

N1 - Funding Information: This study was supported by a grant for scientific research, the 21st Century COE program of the Ministry of Education, Culture, Sports, Science and Technology.

PY - 2005/2/15

Y1 - 2005/2/15

N2 - Ca2CuO2Cl2-yBry (0 ≤ y ≤ 2) has the K2NiF4-type structure with halogens (Cl and Br) at their apical sites and superconductivity can be achieved by substituting Ca2+ sites with Na+. We have succeeded in making a comprehensive superconducting phase diagram of Ca2-xNa xCuO2Cl2-yBry by focusing on special attention to the relationship between the superconductivity and the Cu and Cl/Br distance in Ca2-xNaxCuO2Cl 2-yBry. We were successful in continuously changing the length of c-axis, which is closely related to the distance between the apical site and the CuO2 plane, or the distance between Cu and Cl/Br. Without changing the bonding distance between Cu and O in the CuO2 plane. This is the first example of this kind of control in cuprate superconductors.

AB - Ca2CuO2Cl2-yBry (0 ≤ y ≤ 2) has the K2NiF4-type structure with halogens (Cl and Br) at their apical sites and superconductivity can be achieved by substituting Ca2+ sites with Na+. We have succeeded in making a comprehensive superconducting phase diagram of Ca2-xNa xCuO2Cl2-yBry by focusing on special attention to the relationship between the superconductivity and the Cu and Cl/Br distance in Ca2-xNaxCuO2Cl 2-yBry. We were successful in continuously changing the length of c-axis, which is closely related to the distance between the apical site and the CuO2 plane, or the distance between Cu and Cl/Br. Without changing the bonding distance between Cu and O in the CuO2 plane. This is the first example of this kind of control in cuprate superconductors.

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Superconducting phase diagram in Ca_2-xNa_xCuO ₂Cl_2-yBr_y

Abstract

ASJC Scopus subject areas

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