Anisotropic compression in the high pressure regime of pure and Cr-doped vanadium dioxide

Abstract

We present structural studies of V${}_{1-x}$Cr${}_x$O${}_2$ (pure, 0.7% and 2.5% Cr doped) compounds at room temperature in a diamond anvil cell for pressures up to 20 GPa using synchrotron x-ray powder diffraction. All the samples studied show a persistence of the monoclinic $M_1$ symmetry between 4 and 12 GPa. Above 12 GPa, the monoclinic $M_1$ symmetry changes to isostructural $M_x$ phase (space group $P{2}_1/c$) with a significant anisotropy in lattice compression of the $b$-$c$ plane of the $M_1$ phase. This behavior can be reconciled invoking the pressure induced charge-delocalization.

References in corpus (6)

• Mott transition in VO2 revealed by infrared spectroscopy and nano-imaging
• Orbital-assisted metal-insulator transition in VO${}_2$
• VO2: A Novel View from Band Theory
• Ultrafast Insulator-Metal Phase Transition in VO2 Studied by Multiterahertz Spectroscopy
• Correlated metallic state of vanadium dioxide
• Nanoscale imaging of the electronic and structural transitions in vanadium dioxide

Cited by in corpus (4)

• Direct Observation of Decoupled Structural and Electronic Transitions and an Ambient Pressure Monoclinic-Like Metallic Phase of VO${}_2$
• VO${}_2$ under hydrostatic pressure: Isostructural phase transition close to a critical end-point
• Pressure induced isostructural phase transition in biskyrmion host hexagonal MnNiGa
• Identification of a monoclinic metallic state in VO2 from a modified first-principles approach