Plasmons in high-temperature superconductors

Jae Hoon Kim, I. Bozovic, J. S. Harris, W. Y. Lee, C. B. Eom, T. H. Geballe, E. S. Hellman

Research output: Contribution to journalArticle

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Abstract

Plasmon spectra of free carriers in high-Tc cuprates and bismates are investigated via their complex dielectric functions, which are accurately determined by combining reflectance and spectroellipsometric measurements. All five superconductors under study exhibit a single optic plasmon located at 0.8 eV for La1.85Sr0.15CuO4, 1.4 eV for YBa2Cu3O7, 1.0 eV for Bi2Sr2CaCu2O8, 1.2 eV for Tl2Ba2Ca2Cu3O10, and 1.5 eV for Ba0.54K 0.46BiO3. The low-energy part of the dielectric loss function of each system is quadratic with frequency: Im(-1/ε{lunate}) = βω2, nearly up to the screened plasma frequency. We propose that this characteristic quadratic frequency dependence is universally obeyed in all high-Tc superconductors.

Original languageEnglish
Pages (from-to)1019-1020
Number of pages2
JournalPhysica C: Superconductivity and its applications
Volume185-189
Issue numberPART 2
DOIs
Publication statusPublished - 1991 Dec 1

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Plasmons
High temperature superconductors
plasmons
high temperature superconductors
Superconducting materials
plasma frequencies
Dielectric losses
dielectric loss
cuprates
Optics
optics
reflectance
Plasmas
energy
barium copper yttrium oxide

All Science Journal Classification (ASJC) codes

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

Cite this

Kim, J. H., Bozovic, I., Harris, J. S., Lee, W. Y., Eom, C. B., Geballe, T. H., & Hellman, E. S. (1991). Plasmons in high-temperature superconductors. Physica C: Superconductivity and its applications, 185-189(PART 2), 1019-1020. https://doi.org/10.1016/0921-4534(91)91733-K
Kim, Jae Hoon ; Bozovic, I. ; Harris, J. S. ; Lee, W. Y. ; Eom, C. B. ; Geballe, T. H. ; Hellman, E. S. / Plasmons in high-temperature superconductors. In: Physica C: Superconductivity and its applications. 1991 ; Vol. 185-189, No. PART 2. pp. 1019-1020.
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Kim, JH, Bozovic, I, Harris, JS, Lee, WY, Eom, CB, Geballe, TH & Hellman, ES 1991, 'Plasmons in high-temperature superconductors', Physica C: Superconductivity and its applications, vol. 185-189, no. PART 2, pp. 1019-1020. https://doi.org/10.1016/0921-4534(91)91733-K

Plasmons in high-temperature superconductors. / Kim, Jae Hoon; Bozovic, I.; Harris, J. S.; Lee, W. Y.; Eom, C. B.; Geballe, T. H.; Hellman, E. S.

In: Physica C: Superconductivity and its applications, Vol. 185-189, No. PART 2, 01.12.1991, p. 1019-1020.

Research output: Contribution to journalArticle

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Kim JH, Bozovic I, Harris JS, Lee WY, Eom CB, Geballe TH et al. Plasmons in high-temperature superconductors. Physica C: Superconductivity and its applications. 1991 Dec 1;185-189(PART 2):1019-1020. https://doi.org/10.1016/0921-4534(91)91733-K