Unconventional state with two coexisting long-range orders for frustrated Heisenberg model at quantum phase transition

Details Unconventional state with two coexisting long-range orders for frustrated Heisenberg model at quantum phase transition Unconventional state with two coexisting long-range orders for frustrated Heisenberg model at quantum phase transition

2009-12-20

arxiv.org/abs/0912.4008v1

Physics

Condensed Matter

Strongly Correlated Electrons

11 pages, 5 figures

Scientific paper

For the frustrated two-dimensional $S=1/2$ antiferromagnetic Heisenberg model close to quantum phase transition we consider the singlet ground states retaining both translational and SU(2) symmetry. Besides usually discussed checkerboard, spin-liquid and stripe states an unconventional state with two coexisting long-range orders appears to be possible at sufficiently large damping of spin excitations. The problem is treated in the frames of self-consistent spherically symmetric approach.

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