Possible Observation of a Luttinger-Liquid Behaviour from Photoemission Spectroscopy of One-Dimensional Organic Conductors

Dardel, B.; Malterre, D.; Grioni, M.; Weibel, P.; Baer, Y.; Voit, Johannes; Jérôme, D.

doi:10.1209/0295-5075/24/8/011

Cited by 139 publications

(64 citation statements)

References 34 publications

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“…This surprising decrease of the K ρ parameters should be put in context with values of the K ρ parameters found in photo-emission experiments on T M T SF and T M T T F quasi-one-dimensional organic compounds 21,22 . Indeed Zwick et al…”

Section: Discussionsupporting

confidence: 66%

Optical phonons in a quarter-filled one-dimensional Hubbard model

Maurel

Lepetit

2000

Phys. Rev. B

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The influence of dispersion-less quantum optical phonons on the phase diagram of a quarter-filled Hubbard chain is studied using the Density-matrix renormalization group technique. The ground state phase diagram is obtained for frequencies corresponding to the intramolecular vibrations in organic conductors. For high vibrational modes the system is only slightly affected by the electron-phonons coupling. It remains in a Lüttinger liquid phase as long as the electronic repulsion is larger than the polaronic binding energy. For low vibrational modes the phase diagram is very rich. A noticeable point is the existence of a 4kF CDW phase for small values of the correlation strength. For realistic values of the electron repulsion and of the electron-phonons coupling constant a large phonons-mediated reduction of the Lüttinger liquid parameter Kρ was found compared to the pure electronic model.

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Section: Discussionsupporting

confidence: 66%

Optical phonons in a quarter-filled one-dimensional Hubbard model

Maurel

Lepetit

2000

Phys. Rev. B

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“…By hopping of neighboring electrons, the hole moves to the right as time elapses while the excitation of two parallel spins next to each other remains in place Fig. 5 Temperature dependence of the electrical resistivity along the stacks of various TMTSF and TMTTF salts with different anions as indicated (Dressel et al 2001) The extremely small spectral weight agrees with the reduced density of states observed by photoemission experiments (Dardel et al 1993); instead of a stepfunction as for conventional metals, a power-law is found. The fingerprint of a quasi one-dimensional metal is the correlation-induced gap around 200 cm 1 , above which the optical conductivity of all TMTSF salts follows a power law s(w)/w 1.3 , corresponding to K%0.23 (Schwartz et al 1998).…”

Section: Charge Degree Of Freedomsupporting

confidence: 54%

Spin-charge separation in quasi one-dimensional organic conductors

Dressel

2003

Naturwissenschaften

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Matter is excited by adding an electron or extracting one. These excitations can move in the bulk material almost like a free particle, carrying an electronic charge and spin. The electrons try to avoid each other by Coulomb repulsion and also interact magnetically. If they are confined to one dimension, charge and spin excitations are separated and move independently due to the strong interaction. The unique properties of one-dimensional systems are revealed in a number of experiments on strongly anisotropic materials. Here we review the theoretical models and the experimental indications for the unusual behavior of quasi one-dimensional organic conductors.

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“…Other candidates are semiconductors whose valence and conduction bands touch at the Fermi level [4]. In quasi one-dimensional metals, which can be viewed as realizations of the Luttinger model, the exponent r is a function of the Coulomb interaction [5] and can take values between r << 1 and r > 1.…”

Section: Introductionmentioning

confidence: 99%

Anderson impurity in pseudo-gap Fermi systems

Bulla

Pruschke

Hewson

1997

J. Phys.: Condens. Matter

169

352

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We use the numerical renormalization group method to study an Anderson impurity in a conduction band with the density of states varying as ρ(ω) ∝ |ω| r with r > 0. We find two different fixed points: a local-moment fixed point with the impurity effectively decoupled from the band and a strong-coupling fixed point with a partially screened impurity spin. The specific heat and the spin-susceptibility show powerlaw behaviour with different exponents in strong-coupling and localmoment regime. We also calculate the impurity spectral function which diverges (vanishes) with |ω| −r (|ω| r ) in the strong-coupling (local moment) regime.PACS 75.20.Hr

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Possible Observation of a Luttinger-Liquid Behaviour from Photoemission Spectroscopy of One-Dimensional Organic Conductors

Abstract: High-resolution photoemission experiments have been carried out on one-

Cited by 139 publications

References 34 publications

Optical phonons in a quarter-filled one-dimensional Hubbard model

Optical phonons in a quarter-filled one-dimensional Hubbard model

Spin-charge separation in quasi one-dimensional organic conductors

Anderson impurity in pseudo-gap Fermi systems

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