Insulating-layer formation of metallic LaNiO3 on Nb-doped SrTiO3 substrate
- Yoo, Hyang Keun
- Chang, Young Jun
- Moreschini, Luca
- Kim, Hyeong-Do
- Sohn, Chang Hee
- Sinn, Soobin
- Oh, Ji Seop
- Kuo, Cheng-Tai
- Bostwick, Aaron
- Rotenberg, Eli
- Noh, Tae Won
Publication date
March 2015
DOI Publisher
AIP Publishing ISSN
0003-6951 Journal
Applied Physics Letters Citation count (estimate)
3Abstract
We investigated the electronic structures of strongly correlated metallic LaNiO3 (LNO) and semiconducting Nb-doped SrTiO3 (Nb:STO) heterostructures by varying the LNO film thickness using in situ photoemission spectroscopy. We found that, contrary to other interfaces with SrTiO3 and LaAlO3, insulating LNO layers are formed between metallic LNO layers and Nb:STO. Such behavior seems to be related with an electron transfer from Nb:STO to LNO due to Schottky-barrier formation at the interface
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