Raman studies on single-phasic HgBa2CuO4+δ superconductors

Nam H. Hur; Hye Gyong Lee; Jung Hae Park; Hye Soo Shin; In Sang Yang

doi:10.1016/0921-4534(93)90037-Q

Raman studies on single-phasic HgBa₂CuO_4+δ superconductors

Nam H. Hur, Hye Gyong Lee, Jung Hae Park, Hye Soo Shin, In Sang Yang

Department of Physics

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

32 Scopus citations

Abstract

Polycrystalline samples of HgBa₂CuO_4+δ superconductors were prepared by solid state reaction of HgO and Ba₂CuO_3+x precursor in an evacuated silica tube. The HgBa₂CuO₄₊δ has a T_c of 92 K and has a tetragonal cell (P 4/mmm) with lattice parameters a and c with the values of 3.8868 (2) Å and 9.4886 (1) Å, respectively. Raman spectra of polycrystalline HgBa₂CuO_4+δ show four peaks at 108 cm^-1, 158 cm^-1, 570 cm^-1 and 592 cm^-1. Using a factor group analysis and Raman spectral data of the cuprate superconductors, these modes are assigned as E_g and A_1g modes of Ba atoms and O(2) oxygens. The higher peaks at 570 cm^-1 and 592 cm^-1 are assigned to E_g and A_1g modes of O(2) oxygen, respectively. The lower two modes at 108 cm^-1 and 158 cm^-1 are ascribed to vibrations of Ba atoms. Details of mode assignments are discussed based on symmetry and local structure.

Original language	English
Pages (from-to)	365-368
Number of pages	4
Journal	Physica C: Superconductivity and its Applications
Volume	218
Issue number	3-4
DOIs	https://doi.org/10.1016/0921-4534(93)90037-Q
State	Published - 15 Dec 1993

Bibliographical note

Funding Information:
NHH is grateful to the Ministry of Science and Technology in Korea for financial support and also thanks S.K. Lee, N.H. Kim and J.H. Yeom for their assistance. ISY appreciates the support from KOSEF under grant No. 931-0200-032-2 and from the instrumental facility center of Ewha Womans University in measuring the Raman spectra.

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10.1016/0921-4534(93)90037-Q

Cite this

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title = "Raman studies on single-phasic HgBa2CuO4+δ superconductors",

abstract = "Polycrystalline samples of HgBa2CuO4+δ superconductors were prepared by solid state reaction of HgO and Ba2CuO3+x precursor in an evacuated silica tube. The HgBa2CuO4+δ has a Tc of 92 K and has a tetragonal cell (P 4/mmm) with lattice parameters a and c with the values of 3.8868 (2) {\AA} and 9.4886 (1) {\AA}, respectively. Raman spectra of polycrystalline HgBa2CuO4+δ show four peaks at 108 cm-1, 158 cm-1, 570 cm-1 and 592 cm-1. Using a factor group analysis and Raman spectral data of the cuprate superconductors, these modes are assigned as Eg and A1g modes of Ba atoms and O(2) oxygens. The higher peaks at 570 cm-1 and 592 cm-1 are assigned to Eg and A1g modes of O(2) oxygen, respectively. The lower two modes at 108 cm-1 and 158 cm-1 are ascribed to vibrations of Ba atoms. Details of mode assignments are discussed based on symmetry and local structure.",

author = "Hur, {Nam H.} and Lee, {Hye Gyong} and Park, {Jung Hae} and Shin, {Hye Soo} and Yang, {In Sang}",

note = "Funding Information: NHH is grateful to the Ministry of Science and Technology in Korea for financial support and also thanks S.K. Lee, N.H. Kim and J.H. Yeom for their assistance. ISY appreciates the support from KOSEF under grant No. 931-0200-032-2 and from the instrumental facility center of Ewha Womans University in measuring the Raman spectra.",

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T1 - Raman studies on single-phasic HgBa2CuO4+δ superconductors

AU - Hur, Nam H.

AU - Lee, Hye Gyong

AU - Park, Jung Hae

AU - Shin, Hye Soo

AU - Yang, In Sang

N1 - Funding Information: NHH is grateful to the Ministry of Science and Technology in Korea for financial support and also thanks S.K. Lee, N.H. Kim and J.H. Yeom for their assistance. ISY appreciates the support from KOSEF under grant No. 931-0200-032-2 and from the instrumental facility center of Ewha Womans University in measuring the Raman spectra.

PY - 1993/12/15

Y1 - 1993/12/15

N2 - Polycrystalline samples of HgBa2CuO4+δ superconductors were prepared by solid state reaction of HgO and Ba2CuO3+x precursor in an evacuated silica tube. The HgBa2CuO4+δ has a Tc of 92 K and has a tetragonal cell (P 4/mmm) with lattice parameters a and c with the values of 3.8868 (2) Å and 9.4886 (1) Å, respectively. Raman spectra of polycrystalline HgBa2CuO4+δ show four peaks at 108 cm-1, 158 cm-1, 570 cm-1 and 592 cm-1. Using a factor group analysis and Raman spectral data of the cuprate superconductors, these modes are assigned as Eg and A1g modes of Ba atoms and O(2) oxygens. The higher peaks at 570 cm-1 and 592 cm-1 are assigned to Eg and A1g modes of O(2) oxygen, respectively. The lower two modes at 108 cm-1 and 158 cm-1 are ascribed to vibrations of Ba atoms. Details of mode assignments are discussed based on symmetry and local structure.

AB - Polycrystalline samples of HgBa2CuO4+δ superconductors were prepared by solid state reaction of HgO and Ba2CuO3+x precursor in an evacuated silica tube. The HgBa2CuO4+δ has a Tc of 92 K and has a tetragonal cell (P 4/mmm) with lattice parameters a and c with the values of 3.8868 (2) Å and 9.4886 (1) Å, respectively. Raman spectra of polycrystalline HgBa2CuO4+δ show four peaks at 108 cm-1, 158 cm-1, 570 cm-1 and 592 cm-1. Using a factor group analysis and Raman spectral data of the cuprate superconductors, these modes are assigned as Eg and A1g modes of Ba atoms and O(2) oxygens. The higher peaks at 570 cm-1 and 592 cm-1 are assigned to Eg and A1g modes of O(2) oxygen, respectively. The lower two modes at 108 cm-1 and 158 cm-1 are ascribed to vibrations of Ba atoms. Details of mode assignments are discussed based on symmetry and local structure.

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