Angle-resolved photoemission of quasi-one-dimensional metals

Evidence for luttinger liquid behavior

R. Claessen, G. H. Gweon, F. Reinert, J. W. Allen, W. P. Ellis, Z. X. Shen, C. G. Olson, Lynn Schneemeyer, F. Lévy

Research output: Contribution to journalArticleResearchpeer-review

34 Citations (Scopus)

Abstract

We present angular resolved photoemission data of the quasi-one-dimensional metals K0.3MoO3 and (TaSe4)2I. The measured conduction band dispersions reflect the highly anisotropic nature of these materials. However, no clear Fermi-Dirac cutoff is observed in the spectra above the Peierls transition, being due to either charge density wave (CDW) fluctuations or due to electronic correlation effects in one dimension. The experimental conduction band width of (TaSe4)2I agrees well with a tight-binding calculation, suggesting a description as a conventional Peierls system with CDW fluctuations suppressing the spectral weight at the Fermi energy. In contrast, the spectra of K0.3MoO3 show an excitation which along the direction of highest conductivity ("easy axis") disperses 5 times faster than expected from band theory. This anomalous increase cannot be explained by electron-electron or electron-phonon interactions in a Fermi liquid scenario, but can be accounted for as holon dispersion in a Luttinger liquid framework, which need not conflict with the material's CDW properties.

Original languageEnglish
Pages (from-to)121-126
Number of pages6
JournalJournal of Electron Spectroscopy and Related Phenomena
Volume76
Issue numberC
DOIs
StatePublished - 29 Dec 1995

Fingerprint

Charge density waves
Photoemission
photoelectric emission
Metals
Conduction bands
conduction bands
Liquids
liquids
metals
Fermi liquids
Electron-phonon interactions
Electrons
electron phonon interactions
Fermi level
Dispersions
electrons
cut-off
bandwidth
Bandwidth
conductivity

Cite this

Claessen, R. ; Gweon, G. H. ; Reinert, F. ; Allen, J. W. ; Ellis, W. P. ; Shen, Z. X. ; Olson, C. G. ; Schneemeyer, Lynn ; Lévy, F. / Angle-resolved photoemission of quasi-one-dimensional metals : Evidence for luttinger liquid behavior. In: Journal of Electron Spectroscopy and Related Phenomena. 1995 ; Vol. 76, No. C. pp. 121-126.
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abstract = "We present angular resolved photoemission data of the quasi-one-dimensional metals K0.3MoO3 and (TaSe4)2I. The measured conduction band dispersions reflect the highly anisotropic nature of these materials. However, no clear Fermi-Dirac cutoff is observed in the spectra above the Peierls transition, being due to either charge density wave (CDW) fluctuations or due to electronic correlation effects in one dimension. The experimental conduction band width of (TaSe4)2I agrees well with a tight-binding calculation, suggesting a description as a conventional Peierls system with CDW fluctuations suppressing the spectral weight at the Fermi energy. In contrast, the spectra of K0.3MoO3 show an excitation which along the direction of highest conductivity ({"}easy axis{"}) disperses 5 times faster than expected from band theory. This anomalous increase cannot be explained by electron-electron or electron-phonon interactions in a Fermi liquid scenario, but can be accounted for as holon dispersion in a Luttinger liquid framework, which need not conflict with the material's CDW properties.",
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Angle-resolved photoemission of quasi-one-dimensional metals : Evidence for luttinger liquid behavior. / Claessen, R.; Gweon, G. H.; Reinert, F.; Allen, J. W.; Ellis, W. P.; Shen, Z. X.; Olson, C. G.; Schneemeyer, Lynn; Lévy, F.

In: Journal of Electron Spectroscopy and Related Phenomena, Vol. 76, No. C, 29.12.1995, p. 121-126.

Research output: Contribution to journalArticleResearchpeer-review

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T2 - Evidence for luttinger liquid behavior

AU - Claessen, R.

AU - Gweon, G. H.

AU - Reinert, F.

AU - Allen, J. W.

AU - Ellis, W. P.

AU - Shen, Z. X.

AU - Olson, C. G.

AU - Schneemeyer, Lynn

AU - Lévy, F.

PY - 1995/12/29

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N2 - We present angular resolved photoemission data of the quasi-one-dimensional metals K0.3MoO3 and (TaSe4)2I. The measured conduction band dispersions reflect the highly anisotropic nature of these materials. However, no clear Fermi-Dirac cutoff is observed in the spectra above the Peierls transition, being due to either charge density wave (CDW) fluctuations or due to electronic correlation effects in one dimension. The experimental conduction band width of (TaSe4)2I agrees well with a tight-binding calculation, suggesting a description as a conventional Peierls system with CDW fluctuations suppressing the spectral weight at the Fermi energy. In contrast, the spectra of K0.3MoO3 show an excitation which along the direction of highest conductivity ("easy axis") disperses 5 times faster than expected from band theory. This anomalous increase cannot be explained by electron-electron or electron-phonon interactions in a Fermi liquid scenario, but can be accounted for as holon dispersion in a Luttinger liquid framework, which need not conflict with the material's CDW properties.

AB - We present angular resolved photoemission data of the quasi-one-dimensional metals K0.3MoO3 and (TaSe4)2I. The measured conduction band dispersions reflect the highly anisotropic nature of these materials. However, no clear Fermi-Dirac cutoff is observed in the spectra above the Peierls transition, being due to either charge density wave (CDW) fluctuations or due to electronic correlation effects in one dimension. The experimental conduction band width of (TaSe4)2I agrees well with a tight-binding calculation, suggesting a description as a conventional Peierls system with CDW fluctuations suppressing the spectral weight at the Fermi energy. In contrast, the spectra of K0.3MoO3 show an excitation which along the direction of highest conductivity ("easy axis") disperses 5 times faster than expected from band theory. This anomalous increase cannot be explained by electron-electron or electron-phonon interactions in a Fermi liquid scenario, but can be accounted for as holon dispersion in a Luttinger liquid framework, which need not conflict with the material's CDW properties.

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