The Plaquette Ground State of the ShastrySutherland Model
Abstract
I use the twostep densitymatrix renormalization group method based on twoleg ladder expansion to show numerical evidence of a plaquette ground state for $J_2=1.3J_1$ in the ShastrySutherland model. I argue that the DMRG method is very efficient in the strong frustration regime of twodimensional spin models where a spinPeierls ground state is expected to occur. It is thus complementary to quantum Monte Carlo algorithms, which are known to work well in the small frustration regime but which are plagued by the sign problem in the strong frustration regime.
 Publication:

arXiv eprints
 Pub Date:
 May 2008
 arXiv:
 arXiv:0805.0574
 Bibcode:
 2008arXiv0805.0574M
 Keywords:

 Condensed Matter  Strongly Correlated Electrons
 EPrint:
 4 pages, 5 figures