Field-induced chirality in a frustrated quantum spin ladder

Two Coupled Chains are Simpler than One: Field-induced Chirality in a Frustrated Quantum Spin Ladder

“…1 (see also Ref. 55). Future experimental identification of these interactions is crucial to unraveling the precise nature of defects in BiCu 2 PO 6 .…”

“…To study the effect of the DM interactions, we augmented parameter set A by individual symmetry-allowed DM terms (D b 55,27). For historical reasons and following standard practice, [59][60][61][62][63] we set Γ i j = 0 in these calculations.…”

“…66. 55 Approximate C 2v -symmetry 66 of the CuO 4 plaquettes 25 is assumed. We further assume that the g-tensors are symmetric and positive.…”

“…2(b)], can be estimated from the angular dependence of the NMR shift in the paramagnetic state of pristine and slightly Zn-doped BiCu 2 PO 6 . 55,66 We assume that the corresponding matrices are symmetric. 66 The dipole couplings D i are treated by means of a plane-wise summation technique, 68,69 using the crystal structure reported in Ref.…”

“…By repeating the analysis with J 2 = J 2 = 0.75 J 1 , we estimate uncertainties up to the order of 25% for the elements of the matrices A i g i , and 10% for those of g i . 55 Note, however, that more pessimistic considerations suggest errors of order 100% and more. 55 The details of the above analyses are beyond the scope of this work and have been documented in Refs.…”