Normal-state optical response functions of MgB2 superconductor

Mi Ock Mun; Young Jin Kim; Yu Park; Jae Hoon Kim; S. H. Moon; H. N. Lee; H. G. Kim; B. Oh

Normal-state optical response functions of MgB₂ superconductor

Mi Ock Mun, Young Jin Kim, Yu Park, Jae Hoon Kim, S. H. Moon, H. N. Lee, H. G. Kim, B. Oh

Department of Physics

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

6 Citations (Scopus)

Abstract

The reflectivity of superconducting MgB₂ (T_c = 39 K) has been measured on a randomly oriented thin film at room temperature over a wide-range of frequencies, 20 ≤ ω < 100000 cm^-1. The conductivity shows highly metallic behavior but cannot be explained with a simple Drude model alone. The electronic contribution is analyzed by a generalized Drude model. The scattering rate 1/τ(ω) and the mass renormalization ratio m*(ω)/m = 1 + λ(ω) exhibit clear frequency dependence. The electron-phonon coupling strength is estimated to be λ ∼ 1.5 ± 0.5 while the plasma frequency ω_p is 2.4 eV.

Original language	English
Pages (from-to)	475-477
Number of pages	3
Journal	Journal of Superconductivity and Novel Magnetism
Volume	15
Issue number	5
Publication status	Published - 2002

Bibliographical note

Funding Information:
This work was supported by Grant No. R03-2000-000-00001-0 from the Basic Research Program of the Korea Science & Engineering Foundation. JHK and BO were supported by the Electron Spin Science Center at POSTECH and the National Research Laboratory Project, funded by the Korea Science & Engineering Foundation(KOSEF), respectively.

All Science Journal Classification (ASJC) codes

Electronic, Optical and Magnetic Materials
Condensed Matter Physics

Cite this

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title = "Normal-state optical response functions of MgB2 superconductor",

abstract = "The reflectivity of superconducting MgB2 (Tc = 39 K) has been measured on a randomly oriented thin film at room temperature over a wide-range of frequencies, 20 ≤ ω < 100000 cm-1. The conductivity shows highly metallic behavior but cannot be explained with a simple Drude model alone. The electronic contribution is analyzed by a generalized Drude model. The scattering rate 1/τ(ω) and the mass renormalization ratio m*(ω)/m = 1 + λ(ω) exhibit clear frequency dependence. The electron-phonon coupling strength is estimated to be λ ∼ 1.5 ± 0.5 while the plasma frequency ωp is 2.4 eV.",

author = "Mun, {Mi Ock} and Kim, {Young Jin} and Yu Park and Kim, {Jae Hoon} and Moon, {S. H.} and Lee, {H. N.} and Kim, {H. G.} and B. Oh",

note = "Funding Information: This work was supported by Grant No. R03-2000-000-00001-0 from the Basic Research Program of the Korea Science & Engineering Foundation. JHK and BO were supported by the Electron Spin Science Center at POSTECH and the National Research Laboratory Project, funded by the Korea Science & Engineering Foundation(KOSEF), respectively.",

year = "2002",

language = "English",

volume = "15",

pages = "475--477",

journal = "Journal of Superconductivity and Novel Magnetism",

issn = "1557-1939",

publisher = "Springer New York",

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TY - JOUR

T1 - Normal-state optical response functions of MgB2 superconductor

AU - Mun, Mi Ock

AU - Kim, Young Jin

AU - Park, Yu

AU - Kim, Jae Hoon

AU - Moon, S. H.

AU - Lee, H. N.

AU - Kim, H. G.

AU - Oh, B.

N1 - Funding Information: This work was supported by Grant No. R03-2000-000-00001-0 from the Basic Research Program of the Korea Science & Engineering Foundation. JHK and BO were supported by the Electron Spin Science Center at POSTECH and the National Research Laboratory Project, funded by the Korea Science & Engineering Foundation(KOSEF), respectively.

PY - 2002

Y1 - 2002

N2 - The reflectivity of superconducting MgB2 (Tc = 39 K) has been measured on a randomly oriented thin film at room temperature over a wide-range of frequencies, 20 ≤ ω < 100000 cm-1. The conductivity shows highly metallic behavior but cannot be explained with a simple Drude model alone. The electronic contribution is analyzed by a generalized Drude model. The scattering rate 1/τ(ω) and the mass renormalization ratio m*(ω)/m = 1 + λ(ω) exhibit clear frequency dependence. The electron-phonon coupling strength is estimated to be λ ∼ 1.5 ± 0.5 while the plasma frequency ωp is 2.4 eV.

AB - The reflectivity of superconducting MgB2 (Tc = 39 K) has been measured on a randomly oriented thin film at room temperature over a wide-range of frequencies, 20 ≤ ω < 100000 cm-1. The conductivity shows highly metallic behavior but cannot be explained with a simple Drude model alone. The electronic contribution is analyzed by a generalized Drude model. The scattering rate 1/τ(ω) and the mass renormalization ratio m*(ω)/m = 1 + λ(ω) exhibit clear frequency dependence. The electron-phonon coupling strength is estimated to be λ ∼ 1.5 ± 0.5 while the plasma frequency ωp is 2.4 eV.

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M3 - Article

AN - SCOPUS:9644270336

SN - 1557-1939

VL - 15

SP - 475

EP - 477

JO - Journal of Superconductivity and Novel Magnetism

JF - Journal of Superconductivity and Novel Magnetism

IS - 5

ER -

Normal-state optical response functions of MgB₂ superconductor

Abstract

Bibliographical note

All Science Journal Classification (ASJC) codes

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