Ferromagnetic insulator induced by Peierls instability at orbital order transition

Orbital Peierls state in a magnetic insulator

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 quantitative description of the neutron data is obtained by a theoretical analysis of the spin and orbital correlations of a realistic ...

Orbital order induced ferromagnetic insulating properties

At temperatures below the metal–insulator transition of La1−xSrxMnO3 with 0.1 < x < 0.15, a peculiar ferromagnetic and insulating phase is observed which has been intensively discussed over the last few years. We present a detailed investigation of this phase by means of resonant and high energy x-ray scattering along with measurements of the electrical resistivity, thermal expansion, magnetiza...

Explorer Metal - Insulator Transition and Orbital Order in PbRuO 3

Metal-insulator transition in VO2: a Peierls-Mott-Hubbard mechanism

The electronic structure of VO2 is studied in the frameworks of local density approximation (LDA) and LDA+U to give a quantitative description of the metal-insulator (MI) transition in this system. It is found that, both structural distortion and the local Coulomb interaction, play important roles in the transition. An optical gap, comparable to the experimental value has been obtained in the m...

Proximity-Driven Enhanced Magnetic Order at Ferromagnetic-Insulator-Magnetic-Topological-Insulator Interface.

Magnetic exchange driven proximity effect at a magnetic-insulator-topological-insulator (MI-TI) interface provides a rich playground for novel phenomena as well as a way to realize low energy dissipation quantum devices. Here we report a dramatic enhancement of proximity exchange coupling in the MI/magnetic-TI EuS/Sb(2-x)V(x)Te3 hybrid heterostructure, where V doping is used to drive the TI (Sb...