4 papers · 1 filter
Spin-stiffness of anisotropic Heisenberg model on square lattice and possible mechanism for pinning of the electronic liquid crystal direction in YBCO
T. Pardini, R. R. P. Singh, A. Katanin +1
Using series expansions and spin-wave theory we calculate the spin-stiffness anisotropy in Heisenberg models on the square lattice with anisotropic couplings $J_x,J…
Magnetic order in coupled spin-half and spin-one Heisenberg chains in anisotropic triangular-lattice geometry
T. Pardini, R. R. P. Singh
We study spin-half and spin-one Heisenberg models in the limit where one dimensional (1-D) linear chains, with exchange constant J1, are weakly coupled in an anisotropic triangular…
Mediation of Long Range Charge Transfer by Kondo Bound States
R. G. Endres, D. L. Cox, R. R. P. Singh +1
We present a theory of non-equilibrium long range charge transfer between donor and acceptor centers in a model polymer mediated by magnetic exciton (Kondo) bound states. Our model…
Some Recent Issues in Quantum Magnetism
R. R. P. Singh, W. E. Pickett, D. W. Hone +1
Summary of Quantum Magnetism Conference, Institute for Theoretical Physics, University of California, Santa Barbara, California, August 16-20, 1999.