A unique photo charge behaviour of bare-KTaO3

Hafiz M. Zeeshan; Mubashar Rafiq; Mehwish K. Butt; Ruishu Yang; Shuanhu Wang; Kexin Jin

doi:10.1016/j.physb.2021.413220

A unique photo charge behaviour of bare-KTaO3

Hafiz M. Zeeshan, Mubashar Rafiq, Mehwish K. Butt, Ruishu Yang, Shuanhu Wang, Kexin Jin

School of Physical Science and Technology

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

3 Scopus citations

Abstract

A deep understanding of UV light response of KTaO₃ (KTO) has been explored by means of temperature dependent UV treatment. Two different temperature dependent measurement schemes have been utilized to differentiate between the shallow carriers and deep carriers. A fake transition at 220 K is found, which is actually due to the UV-induced oxygen sub-bands, resulting in the transition in photo-response from transient to persistent. Giant change in the resistance is observed for cooling as compared to heating of substrate, which is credited to the small recombination rate at low temperatures. This temperature dependent resistance response of KTaO₃ under UV light provides an importance of the measurement way of photo-charge carriers in KTaO₃.

Original language	English
Article number	413220
Journal	Physica B: Condensed Matter
Volume	619
DOIs	https://doi.org/10.1016/j.physb.2021.413220
State	Published - 15 Oct 2021

Keywords

Complex oxides
KTaO
Photo-response
UV light

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title = "A unique photo charge behaviour of bare-KTaO3",

abstract = "A deep understanding of UV light response of KTaO3 (KTO) has been explored by means of temperature dependent UV treatment. Two different temperature dependent measurement schemes have been utilized to differentiate between the shallow carriers and deep carriers. A fake transition at 220 K is found, which is actually due to the UV-induced oxygen sub-bands, resulting in the transition in photo-response from transient to persistent. Giant change in the resistance is observed for cooling as compared to heating of substrate, which is credited to the small recombination rate at low temperatures. This temperature dependent resistance response of KTaO3 under UV light provides an importance of the measurement way of photo-charge carriers in KTaO3.",

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AU - Zeeshan, Hafiz M.

AU - Rafiq, Mubashar

AU - Butt, Mehwish K.

AU - Yang, Ruishu

AU - Wang, Shuanhu

AU - Jin, Kexin

PY - 2021/10/15

Y1 - 2021/10/15

N2 - A deep understanding of UV light response of KTaO3 (KTO) has been explored by means of temperature dependent UV treatment. Two different temperature dependent measurement schemes have been utilized to differentiate between the shallow carriers and deep carriers. A fake transition at 220 K is found, which is actually due to the UV-induced oxygen sub-bands, resulting in the transition in photo-response from transient to persistent. Giant change in the resistance is observed for cooling as compared to heating of substrate, which is credited to the small recombination rate at low temperatures. This temperature dependent resistance response of KTaO3 under UV light provides an importance of the measurement way of photo-charge carriers in KTaO3.

AB - A deep understanding of UV light response of KTaO3 (KTO) has been explored by means of temperature dependent UV treatment. Two different temperature dependent measurement schemes have been utilized to differentiate between the shallow carriers and deep carriers. A fake transition at 220 K is found, which is actually due to the UV-induced oxygen sub-bands, resulting in the transition in photo-response from transient to persistent. Giant change in the resistance is observed for cooling as compared to heating of substrate, which is credited to the small recombination rate at low temperatures. This temperature dependent resistance response of KTaO3 under UV light provides an importance of the measurement way of photo-charge carriers in KTaO3.

KW - Complex oxides

KW - KTaO

KW - Photo-response

KW - UV light

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DO - 10.1016/j.physb.2021.413220

M3 - 文章

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SN - 0921-4526

VL - 619

JO - Physica B: Condensed Matter

JF - Physica B: Condensed Matter

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ER -

A unique photo charge behaviour of bare-KTaO3

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Keywords

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