Emergence of One-Dimensional Physics in the Distorted Shastry-Sutherland Lattice

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Date/Time:Tuesday, 29 Mar 2011 - Thursday, 31 Mar 2011
Location:ROOM 19, PHYSICS Hall
Phone:515-294-5630
Channel:Condensed Matter Physics
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Dr. I. Rousochatzakis
Max-Planck-Institut fur Physik komplexer Systeme, Notnitzer Straße 38, 01187 Dresden, Germany

Motivated by the on-going investigation of SrCu2(BO3)2 under pressure,
we study a variant of the two-dimensional Shastry-Sutherland (SS) spin-1/2 model with two types of dimers.
In a large parameter range. This modification induces a dimensional reduction at low energies, with nearly decoupled
effective S=1 Haldane chains forming along one of the diagonals of the lattice.
We also present evidence that the intermediate plaquette solid phase
of the undistorted SS model remains stable in a finite region of the phase diagram

In collaboration with:
M. Moliner (Karlsruhe Institute of Technology) & F. Mila (Ecole Polytechnique Federale de Lausanne)