Bella Lake

Helmholtz Zentrum Berlin, Technical University Berlin

First exploration of novel Bethe String States in the model magnetic material SrCo₂V₂O₈

Complex bound states of magnetic excitations, known as Bethe strings, were predicted almost a century ago to exist in one-dimensional quantum magnets. The string states have so far remained the subject of intense theoretical studies but without experimental verification. Here, by performing neutron scattering experiments on the one-dimensional Heisenberg–Ising antiferromagnet SrCo₂V₂O₈ in high longitudinal magnetic fields, we reveal and explore the string states and find good agreement with calculations.

Zoom-link: https://ucph-ku.zoom.us/j/66299519490?pwd=cHlLS0pjYVRSQit2SW1NNFhHb0VBQT09

Zoom-password: NielsBohr