Effects of disorder on atomic density waves and spin-singlet dimers in one-dimensional optical lattices

Journal Article · Fri Aug 15 04:00:00 EDT 2008 · Physical Review. B, Condensed Matter and Materials Physics

DOI:https://doi.org/10.1103/PHYSREVB.78.085108· OSTI ID:21143628

Xianlong, Gao ^[1]

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1. Department of Physics, Zhejiang Normal University, Jinhua, Zhejiang Province 321004 (China)

Using the Bethe-ansatz density-functional theory, we study a one-dimensional Hubbard model of confined attractively interacting fermions in the presence of a uniformly distributed disorder. The strongly correlated Luther-Emery nature of the attractive one-dimensional Hubbard model is fully taken into account as the reference system in the density-functional theory. The effects of the disorder are investigated on the atomic density waves in the weak-to-intermediate attractive interaction and on the spin-singlet dimers of doubly occupied sites in the strongly attractive regime. It is found that atomic density waves are sensitive to the disorder and the spin-singlet dimers of doubly occupied sites are quite unstable against the disorder. We also show that a very weak disorder could smear the singularities in the stiffness, thus, suppresses the spin-singlet pairs.

• OSTI ID: 21143628
• Journal Information: Physical Review. B, Condensed Matter and Materials Physics, Journal Name: Physical Review. B, Condensed Matter and Materials Physics Journal Issue: 8 Vol. 78; ISSN 1098-0121
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
DENSITY
DENSITY FUNCTIONAL METHOD
DIMERS
FERMIONS
FLEXIBILITY
HUBBARD MODEL
INTERACTIONS
LATTICE FIELD THEORY
ONE-DIMENSIONAL CALCULATIONS
OPTICAL MODELS
SINGULARITY
SPIN