X-ray-induced persistent photoconductivity in vanadium dioxide

Dietze, S H and Marsh, M J and Mohanty, Jyoti Ranjan and et al, . (2014) X-ray-induced persistent photoconductivity in vanadium dioxide. Physical Review B, 90 (16). ISSN 1098-0121

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Abstract

The resistivity of vanadium dioxide (VO2) decreased by over one order of magnitude upon localized illumination with x rays at room temperature. Despite this reduction, the structure remained in the monoclinic phase and had no signature of the high-temperature tetragonal phase that is usually associated with the lower resistance. Once illumination ceased, relaxation to the insulating state took tens of hours near room temperature. However, a full recovery of the insulating state was achieved within minutes by thermal cycling. We show that this behavior is consistent with random local-potential fluctuations and random distribution of discrete recombination sites used to model residual photoconductivity.

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IITH Creators:
IITH CreatorsORCiD
Mohanty, Jyoti RanjanUNSPECIFIED
Item Type: Article
Subjects: Physics
Divisions: Department of Physics
Depositing User: Library Staff
Date Deposited: 13 Sep 2019 08:50
Last Modified: 13 Sep 2019 08:50
URI: http://raiith.iith.ac.in/id/eprint/6243
Publisher URL: http://doi.org/10.1103/PhysRevB.90.165109
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