Spin canting in RbCoCl3·2H2O, a Dzyaloshinsky-Moriya linear cha

Spin-Peierls instability in a quantum spin chain with Dzyaloshinskii-Moriya interaction

“…[16], however, the spin-Peierls instability was discussed only in one limiting case (see below) in the absence of an external field. DM interaction was found to be present in a number of quasi-one-dimensional magnets (see, e.g., [17,18] and also [19] in which RbCoCl 3 ·2H 2 O is described as a pure DM chain) and a study of one-dimensional DM Hamiltonians seems to be of great importance.…”

Crystallographic and magnetic structure of RbCoCl3 · 2 D2O

“…One of these belongs to a neighbouring chain in the bc-plane, the other one to the nearest CoO2 C14-octahedron within the chain. The above criteria have also been used by McElearney and Merchant to indicate the most probable hydrogen-bond pattern in the hydrated compound [4]. The expected isomorphism with RbCoC13 • 2 H20 (space group C 2/c) was confirmed in the refinement procedure, which yielded the final structural parameters listed in table I.…”

“…The relative orientation of the ferromagnetic components was assumed to be parallel within a bc-plane and antiparallel in adjacent bc-planes. The same canted antiferromagnetic model (with ferromagnetic components close to the c*-direction) has been used by McElearney and Merchant [4] to analyse the results of their zerofield susceptibility and heat-capacity measurements. They conclude that the intrachain exchange inter~t Present address: Philips Medical Systems Division, Best, The Netherlands.…”

Entanglement in Two Qubit Magnetic Models With Dm Antisymmetric Anisotropic Exchange Interaction

“…41 It was found that even the compound RbCoCl 3 ·2H 2 O is described as a pure DM chain. 39 The low-temperature magnetic behavior of this compound gives strong evidence that the material consists of weakly interacting linear chains with predominant DM interaction. In addition, study of the DM interaction influence on dynamics of the one-dimensional quantum antiferromagnet shows the big difference in the behavior, depending on whether the coupling D is smaller or larger than the exchange interaction J.…”

“…1, some realistic quasi-one-dimensional compounds with predominance of DM interaction can be described as a pure DM model. 39 Here we consider the main characteristic properties of the DM coupling between two qubits and its influence on the entanglement. If in Hamiltonian (2) we put J x = J y = J z = 0 and B = b = 0 then the model is determined completely by the DM term (1).…”