Neutron and Raman scattering studies of HgBa2CuO4+δ

S. H. Liou; R. Li; Q. Cai; M. Chandrasekhar; H. Luo; M. Chen; W. B. Yelon; A. L. Vasiliev; E. P. Kvam

doi:10.1023/A:1022677711855

Neutron and Raman scattering studies of HgBa₂CuO_4+δ

S. H. Liou, R. Li, Q. Cai, M. Chandrasekhar, H. Luo, M. Chen, W. B. Yelon, A. L. Vasiliev, E. P. Kvam

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

2 Scopus citations

Abstract

The HgBa₂CuO_4+δ sample was characterized by Neutron diffraction and magnetic measurements. Both of the measurements indicate a high purity of the sample. Raman measurement was performed on a HgBa₂CuO_4+δ compound of T_c = 96 K. The apical oxygen vibration at 592 cm^-1 was found to show (a) an above T_c anomaly, and (b) frequency hardening and linewidth broadening below the superconducting phase transition. The latter is attributed to the coupling of the phonon to the electronic excitation and related to the opening of the superconducting gap below the phonon frequency.

Original language	English (US)
Pages (from-to)	59-62
Number of pages	4
Journal	Journal of Superconductivity
Volume	11
Issue number	1
DOIs	https://doi.org/10.1023/A:1022677711855
State	Published - 1998

Keywords

Neutron diffraction
Raman scattering
Superconductors

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics
Physics and Astronomy (miscellaneous)

Access to Document

10.1023/A:1022677711855

Cite this

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title = "Neutron and Raman scattering studies of HgBa2CuO4+δ",

abstract = "The HgBa2CuO4+δ sample was characterized by Neutron diffraction and magnetic measurements. Both of the measurements indicate a high purity of the sample. Raman measurement was performed on a HgBa2CuO4+δ compound of Tc = 96 K. The apical oxygen vibration at 592 cm-1 was found to show (a) an above Tc anomaly, and (b) frequency hardening and linewidth broadening below the superconducting phase transition. The latter is attributed to the coupling of the phonon to the electronic excitation and related to the opening of the superconducting gap below the phonon frequency.",

keywords = "Neutron diffraction, Raman scattering, Superconductors",

author = "Liou, {S. H.} and R. Li and Q. Cai and M. Chandrasekhar and H. Luo and M. Chen and Yelon, {W. B.} and Vasiliev, {A. L.} and Kvam, {E. P.}",

note = "Funding Information: This work was supported by DOE Grant #DE-FG02-90ER45427 through the Midwest Superconductivity Consortium.",

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TY - JOUR

T1 - Neutron and Raman scattering studies of HgBa2CuO4+δ

AU - Liou, S. H.

AU - Li, R.

AU - Cai, Q.

AU - Chandrasekhar, M.

AU - Luo, H.

AU - Chen, M.

AU - Yelon, W. B.

AU - Vasiliev, A. L.

AU - Kvam, E. P.

N1 - Funding Information: This work was supported by DOE Grant #DE-FG02-90ER45427 through the Midwest Superconductivity Consortium.

PY - 1998

Y1 - 1998

N2 - The HgBa2CuO4+δ sample was characterized by Neutron diffraction and magnetic measurements. Both of the measurements indicate a high purity of the sample. Raman measurement was performed on a HgBa2CuO4+δ compound of Tc = 96 K. The apical oxygen vibration at 592 cm-1 was found to show (a) an above Tc anomaly, and (b) frequency hardening and linewidth broadening below the superconducting phase transition. The latter is attributed to the coupling of the phonon to the electronic excitation and related to the opening of the superconducting gap below the phonon frequency.

AB - The HgBa2CuO4+δ sample was characterized by Neutron diffraction and magnetic measurements. Both of the measurements indicate a high purity of the sample. Raman measurement was performed on a HgBa2CuO4+δ compound of Tc = 96 K. The apical oxygen vibration at 592 cm-1 was found to show (a) an above Tc anomaly, and (b) frequency hardening and linewidth broadening below the superconducting phase transition. The latter is attributed to the coupling of the phonon to the electronic excitation and related to the opening of the superconducting gap below the phonon frequency.

KW - Neutron diffraction

KW - Raman scattering

KW - Superconductors

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