Manifestation of electron-phonon interaction in phonon anomaly, superconductivity and transport properties of layered 2H-NbS2

K. Motizuki; Y. Nishio; M. Shirai; N. Suzuki

doi:10.1016/0921-4526(95)00657-5

Manifestation of electron-phonon interaction in phonon anomaly, superconductivity and transport properties of layered 2H-NbS₂

K. Motizuki, Y. Nishio, M. Shirai, N. Suzuki

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

1 Citation (Scopus)

Abstract

Role of electron-phonon interaction in physical properties of 2H-NbS₂ is elucidated microscopically. Characteristic mode and wave vector dependences of the electron-phonon interaction cause remarkable frequency renormalization of the Σ₁ phonon modes around q = 2/3ΓM, which consist mainly of the Nb vibrations. The superconducting and the transport spectral functions have significant values only in the low-frequency range (ω < 20 meV) corresponding to the Nb vibrations. The superconducting transition temperature and the tunneling spectra are obtained by solving the Eliashberg equation. The electrical and thermal resistivities calculated by solving the Boltzmann equation with the use of the transport spectral function agree with observations.

Original language	English
Pages (from-to)	83-85
Number of pages	3
Journal	Physica B: Condensed Matter
Volume	219-220
Issue number	1-4
DOIs	https://doi.org/10.1016/0921-4526(95)00657-5
Publication status	Published - 1996 Apr 1
Externally published	Yes

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics
Electrical and Electronic Engineering

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10.1016/0921-4526(95)00657-5

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abstract = "Role of electron-phonon interaction in physical properties of 2H-NbS2 is elucidated microscopically. Characteristic mode and wave vector dependences of the electron-phonon interaction cause remarkable frequency renormalization of the Σ1 phonon modes around q = 2/3ΓM, which consist mainly of the Nb vibrations. The superconducting and the transport spectral functions have significant values only in the low-frequency range (ω < 20 meV) corresponding to the Nb vibrations. The superconducting transition temperature and the tunneling spectra are obtained by solving the Eliashberg equation. The electrical and thermal resistivities calculated by solving the Boltzmann equation with the use of the transport spectral function agree with observations.",

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AU - Motizuki, K.

AU - Nishio, Y.

AU - Shirai, M.

AU - Suzuki, N.

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N2 - Role of electron-phonon interaction in physical properties of 2H-NbS2 is elucidated microscopically. Characteristic mode and wave vector dependences of the electron-phonon interaction cause remarkable frequency renormalization of the Σ1 phonon modes around q = 2/3ΓM, which consist mainly of the Nb vibrations. The superconducting and the transport spectral functions have significant values only in the low-frequency range (ω < 20 meV) corresponding to the Nb vibrations. The superconducting transition temperature and the tunneling spectra are obtained by solving the Eliashberg equation. The electrical and thermal resistivities calculated by solving the Boltzmann equation with the use of the transport spectral function agree with observations.

AB - Role of electron-phonon interaction in physical properties of 2H-NbS2 is elucidated microscopically. Characteristic mode and wave vector dependences of the electron-phonon interaction cause remarkable frequency renormalization of the Σ1 phonon modes around q = 2/3ΓM, which consist mainly of the Nb vibrations. The superconducting and the transport spectral functions have significant values only in the low-frequency range (ω < 20 meV) corresponding to the Nb vibrations. The superconducting transition temperature and the tunneling spectra are obtained by solving the Eliashberg equation. The electrical and thermal resistivities calculated by solving the Boltzmann equation with the use of the transport spectral function agree with observations.

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