Physics – Condensed Matter – Strongly Correlated Electrons
Scientific paper
2009-03-09
Phys. Rev. B 79, 235120 (2009)
Physics
Condensed Matter
Strongly Correlated Electrons
6 pages, 1 figure
Scientific paper
10.1103/PhysRevB.79.235120
We study effects of nonmagnetic impurities in a Spin Bose-Metal (SBM) phase discovered in a two-leg triangular strip spin-1/2 model with ring exchanges (D. N. Shenget al, arXiv:0902.4210). This phase is a quasi-1D descendant of a 2D spin liquid with spinon Fermi sea, and the present study aims at interpolating between the 1D and 2D cases. Different types of defects can be treated as local energy perturbations, which we find are always relevant. As a result, a nonmagnetic impurity generically cuts the system into two decoupled parts. We calculate bond energy and local spin susceptibility near the defect, both of which can be measured in experiments. The Spin Bose-Metal has dominant correlations at characteristic incommensurate wavevectors that are revealed near the defect. Thus, the bond energy shows a static texture oscillating as a function of distance from the defect and decaying as a slow power law. The local spin susceptibility also oscillates and actually {\it increases} as a function of distance from the defect, similar to the effect found in the 1D chain [S. Eggert and I. Affleck, Phys. Rev. Lett. {\bf 75}, 934 (1995)]. We calculate the corresponding power law exponents for the textures as a function of one Luttinger parameter of the SBM theory.
Lai Hsin-Hua
Motrunich Olexei I.
No associations
LandOfFree
Effects of impurities in Spin Bose-Metal phase on a two-leg triangular strip does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Effects of impurities in Spin Bose-Metal phase on a two-leg triangular strip, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Effects of impurities in Spin Bose-Metal phase on a two-leg triangular strip will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-95359