The superconductivity up to 95 K by tuning order state in Sr2CuO3+δ

Q. Q. Liu; H. Yang; Y. Yu; L. X. Yang; R. C. Yu; F. Y. Li; C. Q. Jin; S. Uchida

doi:10.1016/j.physc.2007.05.012

The superconductivity up to 95 K by tuning order state in Sr₂CuO_3+δ

Q. Q. Liu
, H. Yang
, Y. Yu
, L. X. Yang
, R. C. Yu
, F. Y. Li
, C. Q. Jin^*
, S. Uchida

^*Corresponding author for this work

CAS - Institute of Physics
The University of Tokyo

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

3 Scopus citations

Abstract

We have synthesized a single-phase Sr₂CuO_3+δ superconductor of T_c 75 K with K₂NiF₄ structure under high-pressure showing so far rarely formed partially occupied "apical oxygen" which also acts as the dopant. After post annealing the as-prepared sample from 150 °C to 300 °C at ambient, the superconducting transition temperature (T_c) could be systematically enhanced up to 95 K. Transmission electron microscopy (TEM) measurements on the Sr₂CuO_3+δ superconductors revealed a series of modulated structure phenomena resulting from dopant ordering. The distribution geometry of dopant such as the partially occupied apical oxygen here can be an additional route to reach further higher T_c.

Original language	English
Pages (from-to)	100-102
Number of pages	3
Journal	Physica C: Superconductivity and its Applications
Volume	463-465
Issue number	SUPPL.
DOIs	https://doi.org/10.1016/j.physc.2007.05.012
State	Published - 1 Oct 2007
Externally published	Yes

Keywords

Apical oxygen ordering
High T superconductor
High-pressure synthesis

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10.1016/j.physc.2007.05.012

Cite this

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title = "The superconductivity up to 95 K by tuning order state in Sr2CuO3+δ",

abstract = "We have synthesized a single-phase Sr2CuO3+δ superconductor of Tc 75 K with K2NiF4 structure under high-pressure showing so far rarely formed partially occupied {"}apical oxygen{"} which also acts as the dopant. After post annealing the as-prepared sample from 150 °C to 300 °C at ambient, the superconducting transition temperature (Tc) could be systematically enhanced up to 95 K. Transmission electron microscopy (TEM) measurements on the Sr2CuO3+δ superconductors revealed a series of modulated structure phenomena resulting from dopant ordering. The distribution geometry of dopant such as the partially occupied apical oxygen here can be an additional route to reach further higher Tc.",

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author = "Liu, \{Q. Q.\} and H. Yang and Y. Yu and Yang, \{L. X.\} and Yu, \{R. C.\} and Li, \{F. Y.\} and Jin, \{C. Q.\} and S. Uchida",

year = "2007",

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doi = "10.1016/j.physc.2007.05.012",

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TY - JOUR

T1 - The superconductivity up to 95 K by tuning order state in Sr2CuO3+δ

AU - Liu, Q. Q.

AU - Yang, H.

AU - Yu, Y.

AU - Yang, L. X.

AU - Yu, R. C.

AU - Li, F. Y.

AU - Jin, C. Q.

AU - Uchida, S.

PY - 2007/10/1

Y1 - 2007/10/1

N2 - We have synthesized a single-phase Sr2CuO3+δ superconductor of Tc 75 K with K2NiF4 structure under high-pressure showing so far rarely formed partially occupied "apical oxygen" which also acts as the dopant. After post annealing the as-prepared sample from 150 °C to 300 °C at ambient, the superconducting transition temperature (Tc) could be systematically enhanced up to 95 K. Transmission electron microscopy (TEM) measurements on the Sr2CuO3+δ superconductors revealed a series of modulated structure phenomena resulting from dopant ordering. The distribution geometry of dopant such as the partially occupied apical oxygen here can be an additional route to reach further higher Tc.

AB - We have synthesized a single-phase Sr2CuO3+δ superconductor of Tc 75 K with K2NiF4 structure under high-pressure showing so far rarely formed partially occupied "apical oxygen" which also acts as the dopant. After post annealing the as-prepared sample from 150 °C to 300 °C at ambient, the superconducting transition temperature (Tc) could be systematically enhanced up to 95 K. Transmission electron microscopy (TEM) measurements on the Sr2CuO3+δ superconductors revealed a series of modulated structure phenomena resulting from dopant ordering. The distribution geometry of dopant such as the partially occupied apical oxygen here can be an additional route to reach further higher Tc.

KW - Apical oxygen ordering

KW - High T superconductor

KW - High-pressure synthesis

UR - https://www.scopus.com/pages/publications/34548427505

U2 - 10.1016/j.physc.2007.05.012

DO - 10.1016/j.physc.2007.05.012

M3 - 文章

AN - SCOPUS:34548427505

SN - 0921-4534

VL - 463-465

SP - 100

EP - 102

JO - Physica C: Superconductivity and its Applications

JF - Physica C: Superconductivity and its Applications

IS - SUPPL.

ER -

The superconductivity up to 95 K by tuning order state in Sr₂CuO_3+δ

Abstract

Keywords

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