New aspects of non-Fermi-liquid behaviour in Q1D metals

A. G. Lebed

doi:10.1016/s0379-6779(97)80372-4

New aspects of non-Fermi-liquid behaviour in Q1D metals

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

Abstract

The second order corrections to magnetic moment, M, magnetic susceptibility, χ, and specific heat, C, due to electron-electron ("e-e") interactions are calculated in a Q1D conductor (TMTSF)₂ClO₄ in a metallic phase. Strong magnetic oscillations of these thermodynamical quantities are found to exist due to the oscillations of matrix elements of "e-e" interactions in the Peierls channel under the condition of magnetic breakdown. We note that the frequency of the oscillations corresponds to open ("interference") orbits that contradicts Fermi liquid description of quasiparticles. We demonstrate that the relative magnitudes of these forbidden oscillations are anomalously large: δχ/χ₀ ∼ 1 - 10, δM/M₀ ∼ 10^-1, and δC/C₀ ∼ 10^-2.

Original language	English (US)
Pages (from-to)	1615-1616
Number of pages	2
Journal	Synthetic Metals
Volume	85
Issue number	1-3
DOIs	https://doi.org/10.1016/s0379-6779(97)80372-4
State	Published - Mar 15 1997
Externally published	Yes

Keywords

Many-body and quasiparticle theories
Organic superconductors

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics
Mechanics of Materials
Mechanical Engineering
Metals and Alloys
Materials Chemistry

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10.1016/s0379-6779(97)80372-4

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title = "New aspects of non-Fermi-liquid behaviour in Q1D metals",

abstract = "The second order corrections to magnetic moment, M, magnetic susceptibility, χ, and specific heat, C, due to electron-electron ({"}e-e{"}) interactions are calculated in a Q1D conductor (TMTSF)2ClO4 in a metallic phase. Strong magnetic oscillations of these thermodynamical quantities are found to exist due to the oscillations of matrix elements of {"}e-e{"} interactions in the Peierls channel under the condition of magnetic breakdown. We note that the frequency of the oscillations corresponds to open ({"}interference{"}) orbits that contradicts Fermi liquid description of quasiparticles. We demonstrate that the relative magnitudes of these forbidden oscillations are anomalously large: δχ/χ0 ∼ 1 - 10, δM/M0 ∼ 10-1, and δC/C0 ∼ 10-2.",

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T1 - New aspects of non-Fermi-liquid behaviour in Q1D metals

AU - Lebed, A. G.

PY - 1997/3/15

Y1 - 1997/3/15

N2 - The second order corrections to magnetic moment, M, magnetic susceptibility, χ, and specific heat, C, due to electron-electron ("e-e") interactions are calculated in a Q1D conductor (TMTSF)2ClO4 in a metallic phase. Strong magnetic oscillations of these thermodynamical quantities are found to exist due to the oscillations of matrix elements of "e-e" interactions in the Peierls channel under the condition of magnetic breakdown. We note that the frequency of the oscillations corresponds to open ("interference") orbits that contradicts Fermi liquid description of quasiparticles. We demonstrate that the relative magnitudes of these forbidden oscillations are anomalously large: δχ/χ0 ∼ 1 - 10, δM/M0 ∼ 10-1, and δC/C0 ∼ 10-2.

AB - The second order corrections to magnetic moment, M, magnetic susceptibility, χ, and specific heat, C, due to electron-electron ("e-e") interactions are calculated in a Q1D conductor (TMTSF)2ClO4 in a metallic phase. Strong magnetic oscillations of these thermodynamical quantities are found to exist due to the oscillations of matrix elements of "e-e" interactions in the Peierls channel under the condition of magnetic breakdown. We note that the frequency of the oscillations corresponds to open ("interference") orbits that contradicts Fermi liquid description of quasiparticles. We demonstrate that the relative magnitudes of these forbidden oscillations are anomalously large: δχ/χ0 ∼ 1 - 10, δM/M0 ∼ 10-1, and δC/C0 ∼ 10-2.

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KW - Organic superconductors

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New aspects of non-Fermi-liquid behaviour in Q1D metals

Abstract

Keywords

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