1 research outputs found
Electron-phonon and spin-phonon coupling in NaVO: charge fluctuations effect
We show that the asymmetric crystal environment of the V site in the ladder
compound NaVO leads to a strong coupling of vanadium 3d electrons
to phonons. This coupling causes fluctuations of the charge on the V ions, and
favors a transition to a charge-ordered state at low temperatures. In the low
temperature phase the charge fluctuations modulate the spin-spin superexchange
interaction, resulting in a strong spin-phonon coupling.Comment: Europhysics Letters, to be publishe