Plasmons in high-temperature superconductors

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

doi:10.1016/0921-4534(91)91733-K

Plasmons in high-temperature superconductors

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

Department of Physics

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

4 Citations (Scopus)

Abstract

Plasmon spectra of free carriers in high-T_c 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 La_1.85Sr_0.15CuO₄, 1.4 eV for YBa₂Cu₃O₇, 1.0 eV for Bi₂Sr₂CaCu₂O₈, 1.2 eV for Tl₂Ba₂Ca₂Cu₃O₁₀, and 1.5 eV for Ba_0.54K _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-T_c superconductors.

Original language	English
Pages (from-to)	1019-1020
Number of pages	2
Journal	Physica C: Superconductivity and its applications
Volume	185-189
Issue number	PART 2
DOIs	https://doi.org/10.1016/0921-4534(91)91733-K
Publication status	Published - 1991 Dec 1

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)91733-K

Cite this

@article{83dfe9fc5c8f40228a3c92a79833f937,

title = "Plasmons in high-temperature superconductors",

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.",

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

year = "1991",

month = dec,

day = "1",

doi = "10.1016/0921-4534(91)91733-K",

language = "English",

volume = "185-189",

pages = "1019--1020",

journal = "Physica C: Superconductivity and its applications",

issn = "0921-4534",

publisher = "Elsevier",

number = "PART 2",

}

TY - JOUR

T1 - Plasmons in high-temperature superconductors

AU - Kim, J. H.

AU - Bozovic, I.

AU - Harris, J. S.

AU - Lee, W. Y.

AU - Eom, C. B.

AU - Geballe, T. H.

AU - Hellman, E. S.

PY - 1991/12/1

Y1 - 1991/12/1

N2 - 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.

AB - 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.

UR - http://www.scopus.com/inward/record.url?scp=0026402716&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0026402716&partnerID=8YFLogxK

U2 - 10.1016/0921-4534(91)91733-K

DO - 10.1016/0921-4534(91)91733-K

M3 - Article

AN - SCOPUS:0026402716

SN - 0921-4534

VL - 185-189

SP - 1019

EP - 1020

JO - Physica C: Superconductivity and its applications

JF - Physica C: Superconductivity and its applications

IS - PART 2

ER -

Plasmons in high-temperature superconductors

Abstract

All Science Journal Classification (ASJC) codes

Access to Document

Other files and links

Fingerprint

Cite this