Insulating-layer formation of metallic LaNiO3 on Nb-doped SrTiO3 substrate

Hyang Keun Yoo, Young Jun Chang, Luca Moreschini, Hyeong Do Kim, Chang Hee Sohn, Soobin Sinn, Ji Seop Oh, Cheng Tai Kuo, Aaron Bostwick, Eli Rotenberg, Tae Won Noh

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10 Scopus citations


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.

Original languageEnglish
Article number121601
JournalApplied Physics Letters
Issue number12
StatePublished - 23 Mar 2015


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