Charge and spin dynamics in VO2 nanorods

Kyu Won Lee; Hyocheon Kweon; Jitae Park; Cheol Eui Lee

doi:10.1063/1.3152780

Charge and spin dynamics in VO2 nanorods

Kyu Won Lee, Hyocheon Kweon, Jitae Park, Cheol Eui Lee

Department of Physics

Research output: Contribution to journal › Article › peer-review

11 Citations (Scopus)

Abstract

Electrical conductivity and photoconductivity measurements were carried out on vanadium dioxide (VO2) nanorods prepared by the hydrothermal treatment of vanadium pentoxide gels. While the structural properties of the nanorods resembled those of the Cr-doped VO2, the charge and spin dynamics appears to resemble those of the Nb-doped VO2. The magnetic and (photo)electrical properties of the nanorods can be understood in terms of localization of itinerant electrons giving rise to a spin-polarized (S=3/2) V4+ pair, dominant at higher temperatures, or to a (S=1) V3+ ion out of a V4+ ion pair, dominant at lower temperatures.

Original language	English
Article number	233111
Journal	Applied Physics Letters
Volume	94
Issue number	23
DOIs	https://doi.org/10.1063/1.3152780
Publication status	Published - 2009

Bibliographical note

Funding Information:
This work was supported by the Korean Ministry of Education, Science and Technology (NRL Program R0A-2008-000-20066-0, User Program of Proton Engineering Frontier Project, Grant No. KRF-2006-005-J03601) and by the Seoul Research and Business Development Program (Grant No. 10583). The measurements at the Korean Basic Science Institute (KBSI) are acknowledged.

ASJC Scopus subject areas

Physics and Astronomy (miscellaneous)

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Cite this

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title = "Charge and spin dynamics in VO2 nanorods",

abstract = "Electrical conductivity and photoconductivity measurements were carried out on vanadium dioxide (VO2) nanorods prepared by the hydrothermal treatment of vanadium pentoxide gels. While the structural properties of the nanorods resembled those of the Cr-doped VO2, the charge and spin dynamics appears to resemble those of the Nb-doped VO2. The magnetic and (photo)electrical properties of the nanorods can be understood in terms of localization of itinerant electrons giving rise to a spin-polarized (S=3/2) V4+ pair, dominant at higher temperatures, or to a (S=1) V3+ ion out of a V4+ ion pair, dominant at lower temperatures.",

author = "Lee, {Kyu Won} and Hyocheon Kweon and Jitae Park and Lee, {Cheol Eui}",

note = "Funding Information: This work was supported by the Korean Ministry of Education, Science and Technology (NRL Program R0A-2008-000-20066-0, User Program of Proton Engineering Frontier Project, Grant No. KRF-2006-005-J03601) and by the Seoul Research and Business Development Program (Grant No. 10583). The measurements at the Korean Basic Science Institute (KBSI) are acknowledged.",

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doi = "10.1063/1.3152780",

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T1 - Charge and spin dynamics in VO2 nanorods

AU - Lee, Kyu Won

AU - Kweon, Hyocheon

AU - Park, Jitae

AU - Lee, Cheol Eui

N1 - Funding Information: This work was supported by the Korean Ministry of Education, Science and Technology (NRL Program R0A-2008-000-20066-0, User Program of Proton Engineering Frontier Project, Grant No. KRF-2006-005-J03601) and by the Seoul Research and Business Development Program (Grant No. 10583). The measurements at the Korean Basic Science Institute (KBSI) are acknowledged.

PY - 2009

Y1 - 2009

N2 - Electrical conductivity and photoconductivity measurements were carried out on vanadium dioxide (VO2) nanorods prepared by the hydrothermal treatment of vanadium pentoxide gels. While the structural properties of the nanorods resembled those of the Cr-doped VO2, the charge and spin dynamics appears to resemble those of the Nb-doped VO2. The magnetic and (photo)electrical properties of the nanorods can be understood in terms of localization of itinerant electrons giving rise to a spin-polarized (S=3/2) V4+ pair, dominant at higher temperatures, or to a (S=1) V3+ ion out of a V4+ ion pair, dominant at lower temperatures.

AB - Electrical conductivity and photoconductivity measurements were carried out on vanadium dioxide (VO2) nanorods prepared by the hydrothermal treatment of vanadium pentoxide gels. While the structural properties of the nanorods resembled those of the Cr-doped VO2, the charge and spin dynamics appears to resemble those of the Nb-doped VO2. The magnetic and (photo)electrical properties of the nanorods can be understood in terms of localization of itinerant electrons giving rise to a spin-polarized (S=3/2) V4+ pair, dominant at higher temperatures, or to a (S=1) V3+ ion out of a V4+ ion pair, dominant at lower temperatures.

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Charge and spin dynamics in VO2 nanorods

Abstract

Bibliographical note

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