@article {LoVecchio2014,
	title = {Optical conductivity of V4O7 across its metal-insulator transition},
	journal = {Physical review. B, Condensed matter and materials physics},
	volume = {90},
	year = {2014},
	publisher = {Published by the American Physical Society through the American Institute of Physics,},
	address = {Woodbury, NY},
	abstract = {The optical properties of a V4O7 single crystal have been investigated from the high-temperature metallic phase down to the low-temperature antiferromagnetic insulating phase. The temperature-dependent behavior of the optical conductivity across the metal-to-insulator (MIT) transition can be explained in a polaronic scenario. Charge carriers form strongly localized polarons in the insulating phase, as suggested by a far-infrared charge gap abruptly opening at T-MIT approximate to 237 K. In the metallic phase, instead, the presence of a Drude term is indicative of fairly delocalized charges with a moderately renormalized mass m* approximate to 5m,. The electronic spectral weight is almost recovered on an energy scale of 1 eV, which is much narrower than in the VO2 and V2O3 cases. Those findings suggest that electron-lattice interaction rather than electronic correlation is the driving force for the V4O7 metal-insulator transition.},
	issn = {1098-0121},
	doi = {10.1103/PhysRevB.90.115149},
	author = {Lo Vecchio, I. and Autore, M. and DÁpuzzo, F. and Giorgianni, F. and Perucchi, A. and Schade, U. and Andreev, V. N. and Klimov, V. A. and Lupi, S.}
}
