Weakly coupled one-dimensional Mott insulators
Physical Review B 65:11 (2002) 115117 13pp
Spectral function of a quarter-filled one-dimensional charge density wave insulator.
Phys Rev Lett 88:9 (2002) 096403
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.Spectral Function of a Quarter-Filled One-Dimensional Charge Density Wave Insulator
Physical Review Letters 88 (2002) 096403 4pp
Dynamical density correlation function of one-dimensional Mott insulators in a magnetic field - art. no. 165112
PHYSICAL REVIEW B 66:16 (2002) ARTN 165112
Quantum criticalities in a two-leg antiferromagnetic S=1/2 ladder induced by a staggered magnetic field - art. no. 024412
PHYSICAL REVIEW B 66:2 (2002) ARTN 024412