On the spin-liquid phase of one-dimensional spin-1 bosons
JOURNAL OF STATISTICAL MECHANICS-THEORY AND EXPERIMENT (2009) ARTN P02027
Local density of states of one-dimensional Mott insulators and charge-density wave states with a boundary.
Phys Rev Lett 101:8 (2008) 086403
Abstract:
We determine the local density of states of one-dimensional incommensurate charge-density wave states in the presence of a strong impurity potential, which is modeled by a boundary. We find that the charge-density wave gets pinned at the impurity, which results in a singularity in the Fourier transform of the local density of states at momentum 2k_{F}. At energies above the spin gap we observe dispersing features associated with the spin and charge degrees of freedom, respectively. In the presence of an impurity magnetic field we observe the formation of a bound state localized at the impurity. All of our results carry over to the case of 1D Mott insulators by exchanging the roles of spin and charge degrees of freedom. We discuss the implications of our result for scanning tunneling microscopy experiments on spin-gap systems such as two-leg ladder cuprates.Finite-temperature dynamical structure factor of alternating Heisenberg chains
PHYSICAL REVIEW B 78:9 (2008) ARTN 094411
Finite-temperature lineshapes in gapped quantum spin chains
PHYSICAL REVIEW B 78:10 (2008) ARTN 100403
Modeling magnetic fluctuations in the stripe ordered state
PHYSICAL REVIEW B 78:21 (2008) ARTN 214509