Study of optical plasmons in La1.85Sr0.15Cu2O4

J. H. Kim; I. Bozovic; C. B. Eom; T. H. Geballe; J. S. Harris

doi:10.1016/0921-4534(91)91580-W

Study of optical plasmons in La_1.85Sr_0.15Cu₂O₄

J. H. Kim, I. Bozovic, C. B. Eom, T. H. Geballe, J. S. Harris

Department of Physics

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

11 Citations (Scopus)

Abstract

Reflectance and spectroellipsometric measurements were performed on a high-quality c-axis oriented La_1.85Sr_0.15CuO₄ film to determine accurately the relevant spectral functions. The plasmon spectrum of La_1.85CuO₄ consists of an optic plasmon at about 0.8 eV and possibility a broad band of acoustic plasmons. The charactristic quadratic frequency dependence of the loss function, Im (-1/ge)=βω² for ≤h{stroke}ω 〈 0.7 eV, has been observed. In view of similar behavior in YBa₂Cu₃O₇, Bi₂Sr ₂CaCu₂O₈ and Tl₂Ba₂Ca₂Cu₃O₁₀, this law seems to be universally obeyed in all high-T_c cuprate superconductors.

Original language	English
Pages (from-to)	435-439
Number of pages	5
Journal	Physica C: Superconductivity and its applications
Volume	174
Issue number	4-6
DOIs	https://doi.org/10.1016/0921-4534(91)91580-W
Publication status	Published - 1991 Mar 15

Bibliographical note

Funding Information:
This research was supported by the U.S. Defense Advanced Research Projects Agency-U.S. Office of Naval Research under contract No. N00014-88-0760, by the U.S. Air Force Office of Scientific Research under contract No. F49620-88-C-004, and by the Stanford Center for Materials Research under NSFMRL program.

All Science Journal Classification (ASJC) codes

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

Access to Document

10.1016/0921-4534(91)91580-W

Cite this

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title = "Study of optical plasmons in La1.85Sr0.15Cu2O4 ",

abstract = "Reflectance and spectroellipsometric measurements were performed on a high-quality c-axis oriented La1.85Sr0.15CuO4 film to determine accurately the relevant spectral functions. The plasmon spectrum of La1.85CuO4 consists of an optic plasmon at about 0.8 eV and possibility a broad band of acoustic plasmons. The charactristic quadratic frequency dependence of the loss function, Im (-1/ge)=βω2 for ≤h{stroke}ω 〈 0.7 eV, has been observed. In view of similar behavior in YBa2Cu3O7, Bi2Sr 2CaCu2O8 and Tl2Ba2Ca2Cu3O10, this law seems to be universally obeyed in all high-Tc cuprate superconductors.",

author = "Kim, {J. H.} and I. Bozovic and Eom, {C. B.} and Geballe, {T. H.} and Harris, {J. S.}",

note = "Funding Information: This research was supported by the U.S. Defense Advanced Research Projects Agency-U.S. Office of Naval Research under contract No. N00014-88-0760, by the U.S. Air Force Office of Scientific Research under contract No. F49620-88-C-004, and by the Stanford Center for Materials Research under NSFMRL program.",

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AU - Kim, J. H.

AU - Bozovic, I.

AU - Eom, C. B.

AU - Geballe, T. H.

AU - Harris, J. S.

N1 - Funding Information: This research was supported by the U.S. Defense Advanced Research Projects Agency-U.S. Office of Naval Research under contract No. N00014-88-0760, by the U.S. Air Force Office of Scientific Research under contract No. F49620-88-C-004, and by the Stanford Center for Materials Research under NSFMRL program.

PY - 1991/3/15

Y1 - 1991/3/15

N2 - Reflectance and spectroellipsometric measurements were performed on a high-quality c-axis oriented La1.85Sr0.15CuO4 film to determine accurately the relevant spectral functions. The plasmon spectrum of La1.85CuO4 consists of an optic plasmon at about 0.8 eV and possibility a broad band of acoustic plasmons. The charactristic quadratic frequency dependence of the loss function, Im (-1/ge)=βω2 for ≤h{stroke}ω 〈 0.7 eV, has been observed. In view of similar behavior in YBa2Cu3O7, Bi2Sr 2CaCu2O8 and Tl2Ba2Ca2Cu3O10, this law seems to be universally obeyed in all high-Tc cuprate superconductors.

AB - Reflectance and spectroellipsometric measurements were performed on a high-quality c-axis oriented La1.85Sr0.15CuO4 film to determine accurately the relevant spectral functions. The plasmon spectrum of La1.85CuO4 consists of an optic plasmon at about 0.8 eV and possibility a broad band of acoustic plasmons. The charactristic quadratic frequency dependence of the loss function, Im (-1/ge)=βω2 for ≤h{stroke}ω 〈 0.7 eV, has been observed. In view of similar behavior in YBa2Cu3O7, Bi2Sr 2CaCu2O8 and Tl2Ba2Ca2Cu3O10, this law seems to be universally obeyed in all high-Tc cuprate superconductors.

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