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Minimal model for the frustrated spin ladder system BiCu$_2$PO$_6$ | | Leanna Splinter
; Nils A. Drescher
; Holger Krull
; Götz S. Uhrig
; | | Date: |
14 Jul 2016 | | Abstract: | To establish the microscopic model of the compound BiCu$_2$PO$_6$ is a
challenging task. Inelastic neutron scattering experiments showed that the
dispersion of this material is non-degenerate suggesting the existence of
anisotropic interactions. Here we present a quantitative description of the
excitation spectrum for BiCu$_2$PO$_6$ on the one-particle level. The solution
of the isotropic frustrated spin ladder by continuous unitary transformations
is the starting point of our approach. Further couplings such as isotropic
interladder couplings and anisotropic interactions are included on the
mean-field level. Our aim is to establish a minimal model built on the symmetry
allowed interactions and to find a set of parameters, which allow us to
describe the low-energy part of the dispersion without assuming unrealistic
couplings. | | Source: | arXiv, 1607.4120 | | Services: | Forum | Review | PDF | Favorites | |
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