The study of electronic structure in new Hg-based Sr-containing 1212-typed (Hg0.5Pb0.5)Sr2(Ca1-xY x)Cu2O7 superconductors

R. S. Liu; J. M. Chen; S. F. Hu

doi:10.1016/S0921-4534(97)00597-2

The study of electronic structure in new Hg-based Sr-containing 1212-typed (Hg_0.5Pb_0.5)Sr₂(Ca_1-xY _x)Cu₂O₇ superconductors

R. S. Liu^*
, J. M. Chen
, S. F. Hu

^*Corresponding author for this work

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

Abstract

High resolution O K-edge X-ray-absorption near-edge-structure (XANES) spectra for the series of new Hg-based Sr-containing 1212-typed (Hg_0.5Pb_0.5)Sr₂(Ca_1-xY _x)Cu₂O₇ superconductors (x = 0.3 ∼ 0.7) were measured using a bulk-sensitive total-X-ray-fluorescence-yield technique. Near the O 1s edge, the pre-edge peak with maxima at ∼ 528.3 eV is ascribed to transitions into O 2p holes located in the CuO₂ planes. The intensity of this pre-edge peak monotonically increases with increasing doping level of Ca²⁺ into the Y³⁺ sites. The effect of chemical substitution of Ca²⁺ for Y³⁺ in (Hg_0.5Pb_0.5)Sr₂(Ca_1-xY _x)Cu₂O₇ is to induce O 2p hole states in the CuO₂ planes near the Fermi level which cause an increase of T_c from 15 K for x = 0.6 to 90 K for x = 0.3. Moreover, the generation of O 2p holes within the CuO₂ planes is probably responsible for inducing a transition from a semiconductor to a superconductor.

Original language	English
Pages (from-to)	961-962
Number of pages	2
Journal	Physica C: Superconductivity and its Applications
Volume	282-287
Issue number	PART 2
DOIs	https://doi.org/10.1016/S0921-4534(97)00597-2
Publication status	Published - 1997 Aug
Externally published	Yes

ASJC Scopus subject areas

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

Access to Document

10.1016/S0921-4534(97)00597-2

Cite this

@article{558e77f4d99c4ece96f6345a6a39538d,

title = "The study of electronic structure in new Hg-based Sr-containing 1212-typed (Hg0.5Pb0.5)Sr2(Ca1-xY x)Cu2O7 superconductors",

abstract = "High resolution O K-edge X-ray-absorption near-edge-structure (XANES) spectra for the series of new Hg-based Sr-containing 1212-typed (Hg0.5Pb0.5)Sr2(Ca1-xY x)Cu2O7 superconductors (x = 0.3 ∼ 0.7) were measured using a bulk-sensitive total-X-ray-fluorescence-yield technique. Near the O 1s edge, the pre-edge peak with maxima at ∼ 528.3 eV is ascribed to transitions into O 2p holes located in the CuO2 planes. The intensity of this pre-edge peak monotonically increases with increasing doping level of Ca2+ into the Y3+ sites. The effect of chemical substitution of Ca2+ for Y3+ in (Hg0.5Pb0.5)Sr2(Ca1-xY x)Cu2O7 is to induce O 2p hole states in the CuO2 planes near the Fermi level which cause an increase of Tc from 15 K for x = 0.6 to 90 K for x = 0.3. Moreover, the generation of O 2p holes within the CuO2 planes is probably responsible for inducing a transition from a semiconductor to a superconductor.",

author = "Liu, \{R. S.\} and Chen, \{J. M.\} and Hu, \{S. F.\}",

note = "Funding Information: This research is financially supported by SRRC and National Science Council of the Republic of China under the Grant NSC-86-2113-M-002-020.",

year = "1997",

month = aug,

doi = "10.1016/S0921-4534(97)00597-2",

language = "English",

volume = "282-287",

pages = "961--962",

journal = "Physica C: Superconductivity and its Applications",

issn = "0921-4534",

publisher = "Elsevier BV",

number = "PART 2",

}

TY - JOUR

T1 - The study of electronic structure in new Hg-based Sr-containing 1212-typed (Hg0.5Pb0.5)Sr2(Ca1-xY x)Cu2O7 superconductors

AU - Liu, R. S.

AU - Chen, J. M.

AU - Hu, S. F.

N1 - Funding Information: This research is financially supported by SRRC and National Science Council of the Republic of China under the Grant NSC-86-2113-M-002-020.

PY - 1997/8

Y1 - 1997/8

N2 - High resolution O K-edge X-ray-absorption near-edge-structure (XANES) spectra for the series of new Hg-based Sr-containing 1212-typed (Hg0.5Pb0.5)Sr2(Ca1-xY x)Cu2O7 superconductors (x = 0.3 ∼ 0.7) were measured using a bulk-sensitive total-X-ray-fluorescence-yield technique. Near the O 1s edge, the pre-edge peak with maxima at ∼ 528.3 eV is ascribed to transitions into O 2p holes located in the CuO2 planes. The intensity of this pre-edge peak monotonically increases with increasing doping level of Ca2+ into the Y3+ sites. The effect of chemical substitution of Ca2+ for Y3+ in (Hg0.5Pb0.5)Sr2(Ca1-xY x)Cu2O7 is to induce O 2p hole states in the CuO2 planes near the Fermi level which cause an increase of Tc from 15 K for x = 0.6 to 90 K for x = 0.3. Moreover, the generation of O 2p holes within the CuO2 planes is probably responsible for inducing a transition from a semiconductor to a superconductor.

AB - High resolution O K-edge X-ray-absorption near-edge-structure (XANES) spectra for the series of new Hg-based Sr-containing 1212-typed (Hg0.5Pb0.5)Sr2(Ca1-xY x)Cu2O7 superconductors (x = 0.3 ∼ 0.7) were measured using a bulk-sensitive total-X-ray-fluorescence-yield technique. Near the O 1s edge, the pre-edge peak with maxima at ∼ 528.3 eV is ascribed to transitions into O 2p holes located in the CuO2 planes. The intensity of this pre-edge peak monotonically increases with increasing doping level of Ca2+ into the Y3+ sites. The effect of chemical substitution of Ca2+ for Y3+ in (Hg0.5Pb0.5)Sr2(Ca1-xY x)Cu2O7 is to induce O 2p hole states in the CuO2 planes near the Fermi level which cause an increase of Tc from 15 K for x = 0.6 to 90 K for x = 0.3. Moreover, the generation of O 2p holes within the CuO2 planes is probably responsible for inducing a transition from a semiconductor to a superconductor.

UR - https://www.scopus.com/pages/publications/0031212098

UR - https://www.scopus.com/pages/publications/0031212098#tab=citedBy

U2 - 10.1016/S0921-4534(97)00597-2

DO - 10.1016/S0921-4534(97)00597-2

M3 - Article

AN - SCOPUS:0031212098

SN - 0921-4534

VL - 282-287

SP - 961

EP - 962

JO - Physica C: Superconductivity and its Applications

JF - Physica C: Superconductivity and its Applications

IS - PART 2

ER -

The study of electronic structure in new Hg-based Sr-containing 1212-typed (Hg_0.5Pb_0.5)Sr₂(Ca_1-xY _x)Cu₂O₇ superconductors

Abstract

ASJC Scopus subject areas

Access to Document

Other files and links

Fingerprint

Cite this