The evolution of the local structure of VO2was investigated across the pressure-induced insulator to metaltransition (IMT) by means of pair distribution function measurements. The pressure behavior of the V-V and V-Obond lengths have been determined. The data demonstrated that the pressure-driven IMT is not activated by thesuppression of the Peierls-type distortion. A clear octahedra symmetrization is observed in the metallic phase,suggesting a link between structural degree of freedom and the metallization process.
Pair distribution function analysis: The role of structural degrees of freedom in the high-pressure insulator to metal transition of VO2 / Baldini, M; Postorino, Paolo; Malavasi, L.; Marini, C.; Chapman, K. W.; Mao, Ho Kwang. - In: PHYSICAL REVIEW. B. - ISSN 2469-9950. - STAMPA. - 93:24(2016), pp. 2451471-2451475. [10.1103/PhysRevB.93.245137]
Pair distribution function analysis: The role of structural degrees of freedom in the high-pressure insulator to metal transition of VO2
POSTORINO, Paolo;
2016
Abstract
The evolution of the local structure of VO2was investigated across the pressure-induced insulator to metaltransition (IMT) by means of pair distribution function measurements. The pressure behavior of the V-V and V-Obond lengths have been determined. The data demonstrated that the pressure-driven IMT is not activated by thesuppression of the Peierls-type distortion. A clear octahedra symmetrization is observed in the metallic phase,suggesting a link between structural degree of freedom and the metallization process.| File | Dimensione | Formato | |
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