Superconductivity in the LnNi2B2C intermetallics via boron A1g phonons

L. F. Mattheiss; T. Siegrist; R. J. Cava

doi:10.1016/0038-1098(94)90551-7

Superconductivity in the LnNi₂B₂C intermetallics via boron A_1g phonons

L. F. Mattheiss
, T. Siegrist
, R. J. Cava

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

150 Scopus citations

Abstract

The superconducting properties of the lanthanide LnNi₂B₂C phases are attributed to an electron-phonon mechanism in which high frequency boron a_1g optical phonons dynamically modulate the tetrahedral NiB₄ bond angles. We identify a key energy-band feature within the NiBC s-p manifold whose position relative to E_F is particularly sensitive to the NiB₄ tetrahedral geometry and which exhibits strong electron-phonon coupling. Favorable superconducting properties are expected for compounds where the NiB₄ tetrahedra are nearly "ideal" since this happens to optimize the alignment of this special s-p band with the Fermi level.

Original language	English (US)
Pages (from-to)	587-590
Number of pages	4
Journal	Solid State Communications
Volume	91
Issue number	8
DOIs	https://doi.org/10.1016/0038-1098(94)90551-7
State	Published - Aug 1994
Externally published	Yes

All Science Journal Classification (ASJC) codes

General Chemistry
Condensed Matter Physics
Materials Chemistry

Keywords

A. superconductors
D. electronic band structure
D. phonons

Access to Document

10.1016/0038-1098(94)90551-7

Cite this

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abstract = "The superconducting properties of the lanthanide LnNi2B2C phases are attributed to an electron-phonon mechanism in which high frequency boron a1g optical phonons dynamically modulate the tetrahedral NiB4 bond angles. We identify a key energy-band feature within the NiBC s-p manifold whose position relative to EF is particularly sensitive to the NiB4 tetrahedral geometry and which exhibits strong electron-phonon coupling. Favorable superconducting properties are expected for compounds where the NiB4 tetrahedra are nearly {"}ideal{"} since this happens to optimize the alignment of this special s-p band with the Fermi level.",

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T1 - Superconductivity in the LnNi2B2C intermetallics via boron A1g phonons

AU - Mattheiss, L. F.

AU - Siegrist, T.

AU - Cava, R. J.

PY - 1994/8

Y1 - 1994/8

N2 - The superconducting properties of the lanthanide LnNi2B2C phases are attributed to an electron-phonon mechanism in which high frequency boron a1g optical phonons dynamically modulate the tetrahedral NiB4 bond angles. We identify a key energy-band feature within the NiBC s-p manifold whose position relative to EF is particularly sensitive to the NiB4 tetrahedral geometry and which exhibits strong electron-phonon coupling. Favorable superconducting properties are expected for compounds where the NiB4 tetrahedra are nearly "ideal" since this happens to optimize the alignment of this special s-p band with the Fermi level.

AB - The superconducting properties of the lanthanide LnNi2B2C phases are attributed to an electron-phonon mechanism in which high frequency boron a1g optical phonons dynamically modulate the tetrahedral NiB4 bond angles. We identify a key energy-band feature within the NiBC s-p manifold whose position relative to EF is particularly sensitive to the NiB4 tetrahedral geometry and which exhibits strong electron-phonon coupling. Favorable superconducting properties are expected for compounds where the NiB4 tetrahedra are nearly "ideal" since this happens to optimize the alignment of this special s-p band with the Fermi level.

KW - A. superconductors

KW - D. electronic band structure

KW - D. phonons

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DO - 10.1016/0038-1098(94)90551-7

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