Absence of Quasiparticles in the Photoemission Spectra of Quasi-one-dimensional Bechgaard Salts

Zwick, F.; Brown, Sydney Park; Margaritondo, G.; Merlic, Craig A.; Onellion, M.; Voit, Johannes; Grioni, M.

doi:10.1103/physrevlett.79.3982

Cited by 107 publications

(103 citation statements)

References 24 publications

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“…Similar features are also observed in some quasi-two-dimensional high-T c superconductors whose ARPES spectra have the so-called peak-dip-hump structure where the hump spreads up to energies far from the Fermi surface [2]. As far as wide frequency scale is considered the measurements [1] are in qualitative agreement with our RPA result for strictly one-dimensional band dispersion [3]. Physically the origin of wide feature in the spectral density A(k,ω) is a plasmon collective mode which, due to its anisotropic acoustic dispersion, prevents the appearance of quasi-particle peaks.…”

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confidence: 54%

“…The angle resolved photoemission (ARPES) experiments in some quasi-one-dimensional materials, particularly in Bechgaard salts like (TMTSF) 2 PF 6 , show a wide feature in the spectral density at frequency scale of the order of plasmon frequency, and do not show quasi-particle peaks, main ingredients in spectra of three-dimensional Fermi liquids [1]. Similar features are also observed in some quasi-two-dimensional high-T c superconductors whose ARPES spectra have the so-called peak-dip-hump structure where the hump spreads up to energies far from the Fermi surface [2].…”

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confidence: 99%

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Effects of transverse electron dispersion on photo-emission spectra of quasi-one-dimensional systems

2004

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Abstract. The random phase approximation (RPA) spectral function of the one-dimensional electron band with the three dimensional long range Coulomb interaction shows a broad feature which is spread on the scale of the plasmon energy and vanishes at the chemical potential. The fact that there are no quasi-particle δ-peaks is the direct consequence of the acoustic nature of the collective plasmon mode. This behaviour of the spectral function is in the qualitative agreement with the angle resolved photo-emission spectra of some Bechgaard salts. In the present work we consider the modifications in the spectral function due to finite transverse electron dispersion. The transverse bandwidth is responsible for the appearance of an optical gap in the long wavelength plasmon mode. The plasmon dispersion of such kind introduces the quasi-particle δ-peak into the spectral function at the chemical potential. The cross-over from the Fermi liquid to the non-Fermi liquid regime by decreasing the transverse bandwidth takes place through the decrease of the quasi-particle weight as the optical gap in the long wavelength plasmon mode is closing.

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confidence: 54%

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confidence: 99%

Effects of transverse electron dispersion on photo-emission spectra of quasi-one-dimensional systems

2004

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“…11,22 One-quarter-filled bands in other quasi-onedimensional compounds, such as the Bechgaard salts, have produced strongly correlated Mott states, charge-densitywave phases with spinon and soliton excitations, and hints of Luttinger liquid behavior. 5,[52][53][54][55][56][57][58] The abundance of gold chain reconstructions on silicon suggests the promise of a large degree of control over the electronic structure, which should make it possible to explore a large region of the electronic phase diagram and to find some of the exotic states predicted for one-dimensional electrons.…”

Section: Discussionmentioning

confidence: 99%

Chains of gold atoms with tailored electronic states

et al. 2004

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A combination of angle-resolved photoemission and scanning tunneling microscopy is used to explore the possibilities for tailoring the electronic structure of gold atom chains on silicon surfaces. It is shown that the interchain coupling and the band filling can be adjusted systematically by varying the step spacing via the tilt angle from Si͑111͒. Planes with odd Miller indices are stabilized by chains of gold atoms. Metallic bands and Fermi surfaces are observed. These findings suggest that atomic chains at stepped semiconductor substrates make a highly flexible class of solids approaching the one-dimensional limit.

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“…ARPES measurements on the Bechgaard salts 12 , the transition metalchalcogenides 13 , the blue bronzes 14 and the cuprates 15 have provided evidence in favor of correlated one-dimensional physics although full agreement with the predicted theoretical picture is still lacking.…”

Section: Introductionmentioning

confidence: 99%

Spectral functions for the tomonaga-luttinger and luther-emery liquids

Orgad

2001

Philosophical Magazine B

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We calculate the finite temperature single hole spectral function and the spin dynamic structure factor of spinfull one-dimensional Tomonaga-Luttinger liquid. Analytical expressions are obtained for a number of special cases. We also calculate the single hole spectral function of a spin gapped Luther-Emery liquid and obtain exact results at the free fermion point Ks = 1/2. These results may be applied to the analysis of angle resolved photoemission and neutron scattering experiments on quasi-one-dimensional materials.

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Absence of Quasiparticles in the Photoemission Spectra of Quasi-one-dimensional Bechgaard Salts

Cited by 107 publications

References 24 publications

Effects of transverse electron dispersion on photo-emission spectra of quasi-one-dimensional systems

Effects of transverse electron dispersion on photo-emission spectra of quasi-one-dimensional systems

Chains of gold atoms with tailored electronic states

Spectral functions for the tomonaga-luttinger and luther-emery liquids

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