Magnetic neutron scattering study of YVO3: evidence for an orbital Peierls state.
Neutron spectroscopy has revealed a highly unusual magnetic structure and dynamics in YVO3, an insulating pseudocubic perovskite that undergoes a series of temperature-induced phase transitions between states with different spin and orbital ordering patterns. A good description of the neutron data is obtained by a theoretical analysis of the spin and orbital correlations of a quasi-one-dimensional model. This leads to the tentative identification of one of the phases of YVO3 with the "orbital Peierls state," a theoretically proposed many-body state comprised of orbital singlet bonds.
Ulrich
C
C
Max-Planck-Institut für Festkörperforschung, 70569 Stuttgart, Germany.
Khaliullin
G
G
Sirker
J
J
Reehuis
M
M
Ohl
M
M
Miyasaka
S
S
Tokura
Y
Y
Keimer
B
B