A unique photo charge behaviour of bare-KTaO3

Publikationstyp
Journal Article
Publikationsdatum
2021-10-15
Sprache
English
Author
Zeeshan, Hafiz Muhammad 
Rafiq, Mubashar
Butt, Mehwish K.
Yang, Ruishu
Wang, Shuanhu
Jin, Kexin
TORE-URI
https://hdl.handle.net/11420/45930
Enthalten in
Physica B: Condensed Matter 
Volume
619
Article Number
413220
Citation
Physica B: Condensed Matter 619: 413220 (2021-10-15)
Publisher DOI
10.1016/j.physb.2021.413220
Scopus ID
2-s2.0-85109209426
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.
Schlagworte
Complex oxides
KTaO 3
Photo-response
UV light
DDC Class
530: Physics