Condensed Matter Theory

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Weakly coupled one-dimensional Mott insulators

Physical Review B 65:11 (2002) 115117 13pp

Authors:

FH Essler, Tsvelik, A
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Joule heating of dilute 2D holes in a GaAs quantum well

(2002)

Authors:

Xuan PA Gao, Allen P Mills,, Arthur P Ramirez, Steven H Simon, Loren N Pfeiffer, Kenneth W West
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Polymer induced depletion potentials in polymer-colloid mixtures

(2002)

Authors:

AA Louis, PG Bolhuis, EJ Meijer, JP Hansen
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Lattice Boltzmann simulations of contact line motion in a liquid-gas system

(2002)

Authors:

AJ Briant, P Papatzacos, JM Yeomans
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Spectral function of a quarter-filled one-dimensional charge density wave insulator.

Phys Rev Lett 88:9 (2002) 096403

Authors:

Fabian HL Essler, Alexei M Tsvelik

Abstract:

We consider a one-dimensional charge density wave insulator formed by umklapp processes in a quarter-filled band. The spectrum of the model consists of gapless, uncharged excitations carrying spin +/- 1/2 (spinons) and gapped, spinless excitations carrying charge -/+ signe/2 (solitons and antisolitons). We calculate the low-energy behavior of the single-electron Green's function at zero temperature. The spectral function exhibits a featureless scattering continuum of two solitons and many spinons. The theory predicts that the gap observed by angle resolved photoemission is twice the activation gap in the dc conductivity. We comment on possible applications to PrBa(2)Cu(3)O(7) and to the Bechgaard salts.
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