Electrical and structural properties of VO2 in an electric field

In Hui Hwang; Zhenlan Jin; Chang In Park; Cheng Jun Sun; Dale L. Brewe; Sang Wook Han

doi:10.1016/j.cap.2021.05.010

Electrical and structural properties of VO₂ in an electric field

In Hui Hwang
, Zhenlan Jin
, Chang In Park
, Cheng Jun Sun
, Dale L. Brewe
, Sang Wook Han^*

^*Corresponding author for this work

Physics Education

Research output: Contribution to journal › Journal article › peer-review

12 Scopus citations

Abstract

We examined the electrical and local structural properties of a VO₂ film at different electric fields using electrical resistance and x-ray absorption fine structure (XAFS) measurements at the V K edge in the temperature range of 30–100 °C. The T_c value of the metal-to-insulator transition (MIT) during both heating and cooling decreases with electric field. When the electric field exceeds a certain value, the MIT becomes sharper due to Joule heating. The MIT, the structural phase transition (SPT), and the pre-edge peak transition of the VO₂ do not congruently occur at a uniform temperature. A metallic VO₂ is observed in only the rutile (or M2) symmetry. An electric field induces a substantial amount of conduction electrons in insulating VO₂. Simultaneously measured resistance and XAFS reveal that Joule heating caused by an external electric field significantly affects the MIT and SPT of VO₂.

Original language	English
Pages (from-to)	77-84
Number of pages	8
Journal	Current Applied Physics
Volume	30
DOIs	https://doi.org/10.1016/j.cap.2021.05.010
State	Published - 2021.10

Keywords

Critical
Electric field
Metal insulator transition
Structural phase transition
Temperature
VO2
XAFS

Quacquarelli Symonds(QS) Subject Topics

Materials Science
Physics & Astronomy

Access to Document

10.1016/j.cap.2021.05.010

Cite this

@article{2b40079a642f48da9a3f67e245cdde37,

title = "Electrical and structural properties of VO2 in an electric field",

abstract = "We examined the electrical and local structural properties of a VO2 film at different electric fields using electrical resistance and x-ray absorption fine structure (XAFS) measurements at the V K edge in the temperature range of 30–100 °C. The Tc value of the metal-to-insulator transition (MIT) during both heating and cooling decreases with electric field. When the electric field exceeds a certain value, the MIT becomes sharper due to Joule heating. The MIT, the structural phase transition (SPT), and the pre-edge peak transition of the VO2 do not congruently occur at a uniform temperature. A metallic VO2 is observed in only the rutile (or M2) symmetry. An electric field induces a substantial amount of conduction electrons in insulating VO2. Simultaneously measured resistance and XAFS reveal that Joule heating caused by an external electric field significantly affects the MIT and SPT of VO2.",

keywords = "Critical, Electric field, Metal insulator transition, Structural phase transition, Temperature, VO2, XAFS",

author = "Hwang, \{In Hui\} and Zhenlan Jin and Park, \{Chang In\} and Sun, \{Cheng Jun\} and Brewe, \{Dale L.\} and Han, \{Sang Wook\}",

note = "Publisher Copyright: {\textcopyright} 2021 Korean Physical Society",

year = "2021",

month = oct,

doi = "10.1016/j.cap.2021.05.010",

language = "English",

volume = "30",

pages = "77--84",

journal = "Current Applied Physics",

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}

TY - JOUR

T1 - Electrical and structural properties of VO2 in an electric field

AU - Hwang, In Hui

AU - Jin, Zhenlan

AU - Park, Chang In

AU - Sun, Cheng Jun

AU - Brewe, Dale L.

AU - Han, Sang Wook

PY - 2021/10

Y1 - 2021/10

N2 - We examined the electrical and local structural properties of a VO2 film at different electric fields using electrical resistance and x-ray absorption fine structure (XAFS) measurements at the V K edge in the temperature range of 30–100 °C. The Tc value of the metal-to-insulator transition (MIT) during both heating and cooling decreases with electric field. When the electric field exceeds a certain value, the MIT becomes sharper due to Joule heating. The MIT, the structural phase transition (SPT), and the pre-edge peak transition of the VO2 do not congruently occur at a uniform temperature. A metallic VO2 is observed in only the rutile (or M2) symmetry. An electric field induces a substantial amount of conduction electrons in insulating VO2. Simultaneously measured resistance and XAFS reveal that Joule heating caused by an external electric field significantly affects the MIT and SPT of VO2.

AB - We examined the electrical and local structural properties of a VO2 film at different electric fields using electrical resistance and x-ray absorption fine structure (XAFS) measurements at the V K edge in the temperature range of 30–100 °C. The Tc value of the metal-to-insulator transition (MIT) during both heating and cooling decreases with electric field. When the electric field exceeds a certain value, the MIT becomes sharper due to Joule heating. The MIT, the structural phase transition (SPT), and the pre-edge peak transition of the VO2 do not congruently occur at a uniform temperature. A metallic VO2 is observed in only the rutile (or M2) symmetry. An electric field induces a substantial amount of conduction electrons in insulating VO2. Simultaneously measured resistance and XAFS reveal that Joule heating caused by an external electric field significantly affects the MIT and SPT of VO2.

KW - Critical

KW - Electric field

KW - Metal insulator transition

KW - Structural phase transition

KW - Temperature

KW - VO2

KW - XAFS

UR - https://www.scopus.com/pages/publications/85107734347

U2 - 10.1016/j.cap.2021.05.010

DO - 10.1016/j.cap.2021.05.010

M3 - Journal article

AN - SCOPUS:85107734347

SN - 1567-1739

VL - 30

SP - 77

EP - 84

JO - Current Applied Physics

JF - Current Applied Physics

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