V., Aswin and Kumar, Pramod and Pal, Prabir and Dogra, Anjana (2016) Photo-resistive properties of LaAl0.6Cr0.4O3/SrTiO3 heterostructures: a comparative study with LaAlO3/SrTiO3. Optics Letters, 41 (6). pp. 1134-1137. ISSN 0146-9592

[img] PDF - Published Version
Restricted to Registered users only

Download (1552Kb) | Request a copy


We report photoconductivity measurements on LaAl1-x CrxO(3)/SrTiO3 (x = 0, 0.4) heterostructures. A polar layer modification of metallic LaAlO3/SrTiO3 heterostructure with Cr in the Al sites resulted in an increased photo-response (PR) and relaxation time, in addition to a distinct shift in the spectral weight toward the red end of the spectrum. The visible light photoconductivity is explained by d-d photoconductivity of Cr3+ valence states of the x = 0.4 sample. Besides the established UV sensitivity, we observe a weak peak in PR around 690 nm possibly emanating from the mid-gap states arising from oxygen vacancies. (C) 2016 Optical Society of America

Item Type: Article
Additional Information: Copyright for this article belongs to M/s Optical Society of America.
Subjects: Optics
Depositing User: Dr. Rajpal Walke
Date Deposited: 12 Apr 2018 06:52
Last Modified: 12 Apr 2018 06:52
URI: http://npl.csircentral.net/id/eprint/2321

Actions (login required)

View Item View Item