Superconductivity-induced B2u phonon anomalies of YBa2Cu3O6+x and symmetry of the order parameter. Neutron inelastic scattering studies

H. Harashina; K. Kodama; S. Shamoto; M. Sato; K. Kakurai; M. Nishi

doi:10.1016/0921-4534(95)00792-X

Superconductivity-induced B_2u phonon anomalies of YBa₂Cu₃O_6+x and symmetry of the order parameter. Neutron inelastic scattering studies

H. Harashina
, K. Kodama
, S. Shamoto
, M. Sato
, K. Kakurai
, M. Nishi

Department of Physics

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

16 Citations (Scopus)

Abstract

Superconductivity-induced phonon anomalies have been observed by neutron scattering for a c-axis polarized B_2u mode with out-of-phase motions of O(2) and O(3) within a plane in YBa₂Cu₃O_6+x (x = 1.0 and 0.7). A mode which has in-phase motions of these oxygens with respect to Cu atoms within a Cu0₂-plane does not show any appreciable anomaly. Based on these results and recent theoretical arguments, the symmetry of the superconducting order parameter is pointed out to be (x² - y²)-like. In YBa₂Cu₃O_6.7 the B_2u mode also exhibits phonon anomalies associated with the so-called spin-gap phenomena.

Original language	English
Pages (from-to)	257-259
Number of pages	3
Journal	Physica C: Superconductivity and its Applications
Volume	263
Issue number	1-4
DOIs	https://doi.org/10.1016/0921-4534(95)00792-X
Publication status	Published - 1996 May

All Science Journal Classification (ASJC) codes

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

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10.1016/0921-4534(95)00792-X

Cite this

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abstract = "Superconductivity-induced phonon anomalies have been observed by neutron scattering for a c-axis polarized B2u mode with out-of-phase motions of O(2) and O(3) within a plane in YBa2Cu3O6+x (x = 1.0 and 0.7). A mode which has in-phase motions of these oxygens with respect to Cu atoms within a Cu02-plane does not show any appreciable anomaly. Based on these results and recent theoretical arguments, the symmetry of the superconducting order parameter is pointed out to be (x2 - y2)-like. In YBa2Cu3O6.7 the B2u mode also exhibits phonon anomalies associated with the so-called spin-gap phenomena.",

author = "H. Harashina and K. Kodama and S. Shamoto and M. Sato and K. Kakurai and M. Nishi",

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AU - Harashina, H.

AU - Kodama, K.

AU - Shamoto, S.

AU - Sato, M.

AU - Kakurai, K.

AU - Nishi, M.

PY - 1996/5

Y1 - 1996/5

N2 - Superconductivity-induced phonon anomalies have been observed by neutron scattering for a c-axis polarized B2u mode with out-of-phase motions of O(2) and O(3) within a plane in YBa2Cu3O6+x (x = 1.0 and 0.7). A mode which has in-phase motions of these oxygens with respect to Cu atoms within a Cu02-plane does not show any appreciable anomaly. Based on these results and recent theoretical arguments, the symmetry of the superconducting order parameter is pointed out to be (x2 - y2)-like. In YBa2Cu3O6.7 the B2u mode also exhibits phonon anomalies associated with the so-called spin-gap phenomena.

AB - Superconductivity-induced phonon anomalies have been observed by neutron scattering for a c-axis polarized B2u mode with out-of-phase motions of O(2) and O(3) within a plane in YBa2Cu3O6+x (x = 1.0 and 0.7). A mode which has in-phase motions of these oxygens with respect to Cu atoms within a Cu02-plane does not show any appreciable anomaly. Based on these results and recent theoretical arguments, the symmetry of the superconducting order parameter is pointed out to be (x2 - y2)-like. In YBa2Cu3O6.7 the B2u mode also exhibits phonon anomalies associated with the so-called spin-gap phenomena.

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Superconductivity-induced B_2u phonon anomalies of YBa₂Cu₃O_6+x and symmetry of the order parameter. Neutron inelastic scattering studies

Abstract

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