Year: 1994
Type: article
Abstract: We present results from an inelastic neutron scattering experiment on the candidate Heisenberg spin ladder vanadyl pyrophosphate, ${(\mathrm{VO})}_{2}$${\mathrm{P}}_{2}$${\mathrm{O}}_{7}$. We find evidence for a spin-wave excitation gap of ${E}_{\mathrm{gap}}=3.7\ifmmode\pm\else\textpm\fi{}0.2$ meV at a band minimum near $Q=0.8$ ${\mathrm{\AA{}}}^{\ensuremath{-}1}$. This is consistent with expectations for triplet spin waves in ${(\mathrm{VO})}_{2}$${\mathrm{P}}_{2}$${\mathrm{O}}_{7}$ in the spin-ladder model and represents the first confirmation in nature of a Heisenberg antiferromagnetic spin ladder.
Source: Physical Review Letters
Authors: R. S. Eccleston, T. Barnes, J. Brody, J. W. Johnson
Language: Latvian
Subfield: Condensed Matter Physics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: green
OpenAlex ID: W1997326771